December 2023 - Linux-stable-mirror

stable-rc/queue/5.10 build: 19 builds: 0 failed, 19 passed, 5 warnings (v5.10.204-60-g55a7662a657f)

by kernelci.org bot

stable-rc/queue/5.10 build: 19 builds: 0 failed, 19 passed, 5 warnings (v5.10.204-60-g55a7662a657f) Full Build Summary: https://kernelci.org/build/stable-rc/branch/queue%2F5.10/kernel/v5.10.204-6… Tree: stable-rc Branch: queue/5.10 Git Describe: v5.10.204-60-g55a7662a657f Git Commit: 55a7662a657ff853af91cde3dd39e2200d958ac9 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git Built: 7 unique architectures Warnings Detected: arc: arm64: arm: i386: mips: 32r2el_defconfig (gcc-10): 1 warning riscv: rv32_defconfig (gcc-10): 4 warnings x86_64: Warnings summary: 2 <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp] 2 <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp] 1 WARNING: modpost: Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped. ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- 32r2el_defconfig (mips, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: WARNING: modpost: Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped. -------------------------------------------------------------------------------- allnoconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- allnoconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+arm64-chromebook (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- haps_hs_smp_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- imx_v6_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v5_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nommu_k210_defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- omap2plus_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rv32_defconfig (riscv, gcc-10) — PASS, 0 errors, 4 warnings, 0 section mismatches Warnings: <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp] <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp] <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp] <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp] -------------------------------------------------------------------------------- tinyconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tinyconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vexpress_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+x86-board (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

2 years

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Request to revert lt9611uxc fixes from v5.15.y

by Amit Pundir

Hi Greg, The following lt9611uxc fixes in v5.15.139 broke display on RB5 devboard. drm/bridge: lt9611uxc: fix the race in the error path drm/bridge: lt9611uxc: Register and attach our DSI device at probe drm/bridge: lt9611uxc: Switch to devm MIPI-DSI helpers Reverting them (git revert -s d0d01bb4a560 29aba28ea195 f53a04579328 #5.15 SHA Ids) fix the following errors on RB5 and get the display working again on v5.15.143. lt9611uxc 5-002b: LT9611 revision: 0x17.04.93 lt9611uxc 5-002b: LT9611 version: 0x43 lt9611uxc 5-002b: failed to find dsi host msm ae00000.mdss: bound ae01000.mdp (ops dpu_ops [msm]) msm_dsi_manager_register: failed to register mipi dsi host for DSI 0: -517 Regards, Amit Pundir

2 years

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patch "bus: mhi: host: Drop chan lock before queuing buffers" added to char-misc-next

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled bus: mhi: host: Drop chan lock before queuing buffers to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-next branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will also be merged in the next major kernel release during the merge window. If you have any questions about this process, please let me know. From 01bd694ac2f682fb8017e16148b928482bc8fa4b Mon Sep 17 00:00:00 2001 From: Qiang Yu <quic_qianyu(a)quicinc.com> Date: Mon, 11 Dec 2023 14:42:52 +0800 Subject: bus: mhi: host: Drop chan lock before queuing buffers Ensure read and write locks for the channel are not taken in succession by dropping the read lock from parse_xfer_event() such that a callback given to client can potentially queue buffers and acquire the write lock in that process. Any queueing of buffers should be done without channel read lock acquired as it can result in multiple locks and a soft lockup. Cc: <stable(a)vger.kernel.org> # 5.7 Fixes: 1d3173a3bae7 ("bus: mhi: core: Add support for processing events from client device") Signed-off-by: Qiang Yu <quic_qianyu(a)quicinc.com> Reviewed-by: Jeffrey Hugo <quic_jhugo(a)quicinc.com> Tested-by: Jeffrey Hugo <quic_jhugo(a)quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org> Link: https://lore.kernel.org/r/1702276972-41296-3-git-send-email-quic_qianyu@qui… [mani: added fixes tag and cc'ed stable] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org> --- drivers/bus/mhi/host/main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index ad7807e4b523..abb561db9ae1 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -644,6 +644,8 @@ static int parse_xfer_event(struct mhi_controller *mhi_cntrl, mhi_del_ring_element(mhi_cntrl, tre_ring); local_rp = tre_ring->rp; + read_unlock_bh(&mhi_chan->lock); + /* notify client */ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result); @@ -669,6 +671,8 @@ static int parse_xfer_event(struct mhi_controller *mhi_cntrl, kfree(buf_info->cb_buf); } } + + read_lock_bh(&mhi_chan->lock); } break; } /* CC_EOT */ -- 2.43.0

2 years

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patch "bus: mhi: host: Drop chan lock before queuing buffers" added to char-misc-testing

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled bus: mhi: host: Drop chan lock before queuing buffers to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-testing branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will be merged to the char-misc-next branch sometime soon, after it passes testing, and the merge window is open. If you have any questions about this process, please let me know. From 01bd694ac2f682fb8017e16148b928482bc8fa4b Mon Sep 17 00:00:00 2001 From: Qiang Yu <quic_qianyu(a)quicinc.com> Date: Mon, 11 Dec 2023 14:42:52 +0800 Subject: bus: mhi: host: Drop chan lock before queuing buffers Ensure read and write locks for the channel are not taken in succession by dropping the read lock from parse_xfer_event() such that a callback given to client can potentially queue buffers and acquire the write lock in that process. Any queueing of buffers should be done without channel read lock acquired as it can result in multiple locks and a soft lockup. Cc: <stable(a)vger.kernel.org> # 5.7 Fixes: 1d3173a3bae7 ("bus: mhi: core: Add support for processing events from client device") Signed-off-by: Qiang Yu <quic_qianyu(a)quicinc.com> Reviewed-by: Jeffrey Hugo <quic_jhugo(a)quicinc.com> Tested-by: Jeffrey Hugo <quic_jhugo(a)quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org> Link: https://lore.kernel.org/r/1702276972-41296-3-git-send-email-quic_qianyu@qui… [mani: added fixes tag and cc'ed stable] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org> --- drivers/bus/mhi/host/main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index ad7807e4b523..abb561db9ae1 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -644,6 +644,8 @@ static int parse_xfer_event(struct mhi_controller *mhi_cntrl, mhi_del_ring_element(mhi_cntrl, tre_ring); local_rp = tre_ring->rp; + read_unlock_bh(&mhi_chan->lock); + /* notify client */ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result); @@ -669,6 +671,8 @@ static int parse_xfer_event(struct mhi_controller *mhi_cntrl, kfree(buf_info->cb_buf); } } + + read_lock_bh(&mhi_chan->lock); } break; } /* CC_EOT */ -- 2.43.0

2 years

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patch "Revert "iio: hid-sensor-als: Add light color temperature support"" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Revert "iio: hid-sensor-als: Add light color temperature support" to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From d4005431673929a1259ad791db87408fcf85d2cc Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada <srinivas.pandruvada(a)linux.intel.com> Date: Sun, 17 Dec 2023 12:07:03 -0800 Subject: Revert "iio: hid-sensor-als: Add light color temperature support" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This reverts commit 5f05285df691b1e82108eead7165feae238c95ef. This commit assumes that every HID descriptor for ALS sensor has presence of usage id ID HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE. When the above usage id is absent, driver probe fails. This breaks ALS sensor functionality on many platforms. Till we have a good solution, revert this commit. Reported-by: Thomas Weißschuh <thomas(a)t-8ch.de> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218223 Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada(a)linux.intel.com> Cc: <stable(a)vger.kernel.org> Acked-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> Link: https://lore.kernel.org/r/20231217200703.719876-3-srinivas.pandruvada@linux… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/iio/light/hid-sensor-als.c | 37 ++---------------------------- include/linux/hid-sensor-ids.h | 1 - 2 files changed, 2 insertions(+), 36 deletions(-) diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c index d44b3f30ae4a..5cd27f04b45e 100644 --- a/drivers/iio/light/hid-sensor-als.c +++ b/drivers/iio/light/hid-sensor-als.c @@ -14,9 +14,8 @@ #include "../common/hid-sensors/hid-sensor-trigger.h" enum { - CHANNEL_SCAN_INDEX_INTENSITY, - CHANNEL_SCAN_INDEX_ILLUM, - CHANNEL_SCAN_INDEX_COLOR_TEMP, + CHANNEL_SCAN_INDEX_INTENSITY = 0, + CHANNEL_SCAN_INDEX_ILLUM = 1, CHANNEL_SCAN_INDEX_MAX }; @@ -66,16 +65,6 @@ static const struct iio_chan_spec als_channels[] = { BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE), .scan_index = CHANNEL_SCAN_INDEX_ILLUM, }, - { - .type = IIO_COLORTEMP, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | - BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_SAMP_FREQ) | - BIT(IIO_CHAN_INFO_HYSTERESIS) | - BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE), - .scan_index = CHANNEL_SCAN_INDEX_COLOR_TEMP, - }, IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP) }; @@ -114,11 +103,6 @@ static int als_read_raw(struct iio_dev *indio_dev, min = als_state->als[chan->scan_index].logical_minimum; address = HID_USAGE_SENSOR_LIGHT_ILLUM; break; - case CHANNEL_SCAN_INDEX_COLOR_TEMP: - report_id = als_state->als[chan->scan_index].report_id; - min = als_state->als[chan->scan_index].logical_minimum; - address = HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE; - break; default: report_id = -1; break; @@ -239,10 +223,6 @@ static int als_capture_sample(struct hid_sensor_hub_device *hsdev, als_state->scan.illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data; ret = 0; break; - case HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE: - als_state->scan.illum[CHANNEL_SCAN_INDEX_COLOR_TEMP] = sample_data; - ret = 0; - break; case HID_USAGE_SENSOR_TIME_TIMESTAMP: als_state->timestamp = hid_sensor_convert_timestamp(&als_state->common_attributes, *(s64 *)raw_data); @@ -278,19 +258,6 @@ static int als_parse_report(struct platform_device *pdev, st->als[i].report_id); } - ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT, - usage_id, - HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE, - &st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP]); - if (ret < 0) - return ret; - als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_COLOR_TEMP, - st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].size); - - dev_dbg(&pdev->dev, "als %x:%x\n", - st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].index, - st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].report_id); - st->scale_precision = hid_sensor_format_scale(usage_id, &st->als[CHANNEL_SCAN_INDEX_INTENSITY], &st->scale_pre_decml, &st->scale_post_decml); diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h index 8af4fb3e0254..13b1e65fbdcc 100644 --- a/include/linux/hid-sensor-ids.h +++ b/include/linux/hid-sensor-ids.h @@ -21,7 +21,6 @@ #define HID_USAGE_SENSOR_ALS 0x200041 #define HID_USAGE_SENSOR_DATA_LIGHT 0x2004d0 #define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1 -#define HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE 0x2004d2 /* PROX (200011) */ #define HID_USAGE_SENSOR_PROX 0x200011 -- 2.43.0

2 years

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patch "Revert "iio: hid-sensor-als: Add light chromaticity support"" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Revert "iio: hid-sensor-als: Add light chromaticity support" to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From b9670ee2e975e1cb6751019d5dc5c193aecd8ba2 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada <srinivas.pandruvada(a)linux.intel.com> Date: Sun, 17 Dec 2023 12:07:02 -0800 Subject: Revert "iio: hid-sensor-als: Add light chromaticity support" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This reverts commit ee3710f39f9d0ae5137a866138d005fe1ad18132. This commit assumes that every HID descriptor for ALS sensor has presence of usage id ID HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X and HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y. When the above usage ids are absent, driver probe fails. This breaks ALS sensor functionality on many platforms. Till we have a good solution, revert this commit. Reported-by: Thomas Weißschuh <thomas(a)t-8ch.de> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218223 Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada(a)linux.intel.com> Cc: <stable(a)vger.kernel.org> Acked-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> Link: https://lore.kernel.org/r/20231217200703.719876-2-srinivas.pandruvada@linux… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/iio/light/hid-sensor-als.c | 63 ------------------------------ include/linux/hid-sensor-ids.h | 3 -- 2 files changed, 66 deletions(-) diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c index f17304b54468..d44b3f30ae4a 100644 --- a/drivers/iio/light/hid-sensor-als.c +++ b/drivers/iio/light/hid-sensor-als.c @@ -17,8 +17,6 @@ enum { CHANNEL_SCAN_INDEX_INTENSITY, CHANNEL_SCAN_INDEX_ILLUM, CHANNEL_SCAN_INDEX_COLOR_TEMP, - CHANNEL_SCAN_INDEX_CHROMATICITY_X, - CHANNEL_SCAN_INDEX_CHROMATICITY_Y, CHANNEL_SCAN_INDEX_MAX }; @@ -78,30 +76,6 @@ static const struct iio_chan_spec als_channels[] = { BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE), .scan_index = CHANNEL_SCAN_INDEX_COLOR_TEMP, }, - { - .type = IIO_CHROMATICITY, - .modified = 1, - .channel2 = IIO_MOD_X, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | - BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_SAMP_FREQ) | - BIT(IIO_CHAN_INFO_HYSTERESIS) | - BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE), - .scan_index = CHANNEL_SCAN_INDEX_CHROMATICITY_X, - }, - { - .type = IIO_CHROMATICITY, - .modified = 1, - .channel2 = IIO_MOD_Y, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | - BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_SAMP_FREQ) | - BIT(IIO_CHAN_INFO_HYSTERESIS) | - BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE), - .scan_index = CHANNEL_SCAN_INDEX_CHROMATICITY_Y, - }, IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP) }; @@ -145,16 +119,6 @@ static int als_read_raw(struct iio_dev *indio_dev, min = als_state->als[chan->scan_index].logical_minimum; address = HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE; break; - case CHANNEL_SCAN_INDEX_CHROMATICITY_X: - report_id = als_state->als[chan->scan_index].report_id; - min = als_state->als[chan->scan_index].logical_minimum; - address = HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X; - break; - case CHANNEL_SCAN_INDEX_CHROMATICITY_Y: - report_id = als_state->als[chan->scan_index].report_id; - min = als_state->als[chan->scan_index].logical_minimum; - address = HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y; - break; default: report_id = -1; break; @@ -279,14 +243,6 @@ static int als_capture_sample(struct hid_sensor_hub_device *hsdev, als_state->scan.illum[CHANNEL_SCAN_INDEX_COLOR_TEMP] = sample_data; ret = 0; break; - case HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X: - als_state->scan.illum[CHANNEL_SCAN_INDEX_CHROMATICITY_X] = sample_data; - ret = 0; - break; - case HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y: - als_state->scan.illum[CHANNEL_SCAN_INDEX_CHROMATICITY_Y] = sample_data; - ret = 0; - break; case HID_USAGE_SENSOR_TIME_TIMESTAMP: als_state->timestamp = hid_sensor_convert_timestamp(&als_state->common_attributes, *(s64 *)raw_data); @@ -335,25 +291,6 @@ static int als_parse_report(struct platform_device *pdev, st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].index, st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].report_id); - for (i = 0; i < 2; i++) { - int next_scan_index = CHANNEL_SCAN_INDEX_CHROMATICITY_X + i; - - ret = sensor_hub_input_get_attribute_info(hsdev, - HID_INPUT_REPORT, usage_id, - HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X + i, - &st->als[next_scan_index]); - if (ret < 0) - return ret; - - als_adjust_channel_bit_mask(channels, - CHANNEL_SCAN_INDEX_CHROMATICITY_X + i, - st->als[next_scan_index].size); - - dev_dbg(&pdev->dev, "als %x:%x\n", - st->als[next_scan_index].index, - st->als[next_scan_index].report_id); - } - st->scale_precision = hid_sensor_format_scale(usage_id, &st->als[CHANNEL_SCAN_INDEX_INTENSITY], &st->scale_pre_decml, &st->scale_post_decml); diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h index 6730ee900ee1..8af4fb3e0254 100644 --- a/include/linux/hid-sensor-ids.h +++ b/include/linux/hid-sensor-ids.h @@ -22,9 +22,6 @@ #define HID_USAGE_SENSOR_DATA_LIGHT 0x2004d0 #define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1 #define HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE 0x2004d2 -#define HID_USAGE_SENSOR_LIGHT_CHROMATICITY 0x2004d3 -#define HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X 0x2004d4 -#define HID_USAGE_SENSOR_LIGHT_CHROMATICITY_Y 0x2004d5 /* PROX (200011) */ #define HID_USAGE_SENSOR_PROX 0x200011 -- 2.43.0

2 years

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[PATCH 1/2] fb: flush deferred work in fb_deferred_io_fsync()

by Nam Cao

The driver's fsync() is supposed to flush any pending operation to hardware. It is implemented in this driver by cancelling the queued deferred IO first, then schedule it for "immediate execution" by calling schedule_delayed_work() again with delay=0. However, setting delay=0 only means the work is scheduled immediately, it does not mean the work is executed immediately. There is no guarantee that the work is finished after schedule_delayed_work() returns. After this driver's fsync() returns, there can still be pending work. Furthermore, if close() is called by users immediately after fsync(), the pending work gets cancelled and fsync() may do nothing. To ensure that the deferred IO completes, use flush_delayed_work() instead. Write operations to this driver either write to the device directly, or invoke schedule_delayed_work(); so by flushing the workqueue, it can be guaranteed that all previous writes make it to the device. Fixes: 5e841b88d23d ("fb: fsync() method for deferred I/O flush.") Cc: stable(a)vger.kernel.org Signed-off-by: Nam Cao <namcao(a)linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> --- drivers/video/fbdev/core/fb_defio.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c index 274f5d0fa247..6c8b81c452f0 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -132,11 +132,7 @@ int fb_deferred_io_fsync(struct file *file, loff_t start, loff_t end, int datasy return 0; inode_lock(inode); - /* Kill off the delayed work */ - cancel_delayed_work_sync(&info->deferred_work); - - /* Run it immediately */ - schedule_delayed_work(&info->deferred_work, 0); + flush_delayed_work(&info->deferred_work); inode_unlock(inode); return 0; -- 2.39.2

2 years

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stable-rc/queue/6.6 build: 20 builds: 0 failed, 20 passed (v6.6.7-166-g6a5518dcff6f)

by kernelci.org bot

stable-rc/queue/6.6 build: 20 builds: 0 failed, 20 passed (v6.6.7-166-g6a5518dcff6f) Full Build Summary: https://kernelci.org/build/stable-rc/branch/queue%2F6.6/kernel/v6.6.7-166-g… Tree: stable-rc Branch: queue/6.6 Git Describe: v6.6.7-166-g6a5518dcff6f Git Commit: 6a5518dcff6f8d059d613bf4850c3ea0fecbceec Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git Built: 7 unique architectures ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- 32r2el_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- allnoconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- allnoconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+arm64-chromebook (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- haps_hs_smp_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- imx_v6_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v5_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nommu_k210_defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nommu_k210_sdcard_defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- omap2plus_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rv32_defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tinyconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tinyconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vexpress_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+x86-board (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

2 years

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FAILED: patch "[PATCH] fuse: share lookup state between submount and its parent" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x c4d361f66ac91db8fc65061a9671682f61f4ca9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023121709-gout-brick-e85e@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: c4d361f66ac9 ("fuse: share lookup state between submount and its parent") 972f4c46d0a1 ("fuse: cache btime") d3045530bdd2 ("fuse: implement statx") 9dc10a54abe5 ("fuse: add ATTR_TIMEOUT macro") 8d8f9c4b8df6 ("fuse: handle empty request_mask in statx") e78662e818f9 ("fuse: add a new fuse init flag to relax restrictions in no cache mode") 5cadfbd5a11e ("fuse: add feature flag for expire-only") d40b2f4c94f2 ("Merge tag 'fuse-update-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c4d361f66ac91db8fc65061a9671682f61f4ca9d Mon Sep 17 00:00:00 2001 From: Krister Johansen <kjlx(a)templeofstupid.com> Date: Fri, 3 Nov 2023 10:39:47 -0700 Subject: [PATCH] fuse: share lookup state between submount and its parent Fuse submounts do not perform a lookup for the nodeid that they inherit from their parent. Instead, the code decrements the nlookup on the submount's fuse_inode when it is instantiated, and no forget is performed when a submount root is evicted. Trouble arises when the submount's parent is evicted despite the submount itself being in use. In this author's case, the submount was in a container and deatched from the initial mount namespace via a MNT_DEATCH operation. When memory pressure triggered the shrinker, the inode from the parent was evicted, which triggered enough forgets to render the submount's nodeid invalid. Since submounts should still function, even if their parent goes away, solve this problem by sharing refcounted state between the parent and its submount. When all of the references on this shared state reach zero, it's safe to forget the final lookup of the fuse nodeid. Signed-off-by: Krister Johansen <kjlx(a)templeofstupid.com> Cc: stable(a)vger.kernel.org Fixes: 1866d779d5d2 ("fuse: Allow fuse_fill_super_common() for submounts") Signed-off-by: Miklos Szeredi <mszeredi(a)redhat.com> diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 69bcffaf4832..1df83eebda92 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -63,6 +63,19 @@ struct fuse_forget_link { struct fuse_forget_link *next; }; +/* Submount lookup tracking */ +struct fuse_submount_lookup { + /** Refcount */ + refcount_t count; + + /** Unique ID, which identifies the inode between userspace + * and kernel */ + u64 nodeid; + + /** The request used for sending the FORGET message */ + struct fuse_forget_link *forget; +}; + /** FUSE inode */ struct fuse_inode { /** Inode data */ @@ -158,6 +171,8 @@ struct fuse_inode { */ struct fuse_inode_dax *dax; #endif + /** Submount specific lookup tracking */ + struct fuse_submount_lookup *submount_lookup; }; /** FUSE inode state bits */ diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 88090c6026a7..2a6d44f91729 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -68,6 +68,24 @@ struct fuse_forget_link *fuse_alloc_forget(void) return kzalloc(sizeof(struct fuse_forget_link), GFP_KERNEL_ACCOUNT); } +static struct fuse_submount_lookup *fuse_alloc_submount_lookup(void) +{ + struct fuse_submount_lookup *sl; + + sl = kzalloc(sizeof(struct fuse_submount_lookup), GFP_KERNEL_ACCOUNT); + if (!sl) + return NULL; + sl->forget = fuse_alloc_forget(); + if (!sl->forget) + goto out_free; + + return sl; + +out_free: + kfree(sl); + return NULL; +} + static struct inode *fuse_alloc_inode(struct super_block *sb) { struct fuse_inode *fi; @@ -83,6 +101,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) fi->attr_version = 0; fi->orig_ino = 0; fi->state = 0; + fi->submount_lookup = NULL; mutex_init(&fi->mutex); spin_lock_init(&fi->lock); fi->forget = fuse_alloc_forget(); @@ -113,6 +132,17 @@ static void fuse_free_inode(struct inode *inode) kmem_cache_free(fuse_inode_cachep, fi); } +static void fuse_cleanup_submount_lookup(struct fuse_conn *fc, + struct fuse_submount_lookup *sl) +{ + if (!refcount_dec_and_test(&sl->count)) + return; + + fuse_queue_forget(fc, sl->forget, sl->nodeid, 1); + sl->forget = NULL; + kfree(sl); +} + static void fuse_evict_inode(struct inode *inode) { struct fuse_inode *fi = get_fuse_inode(inode); @@ -132,6 +162,11 @@ static void fuse_evict_inode(struct inode *inode) fi->nlookup); fi->forget = NULL; } + + if (fi->submount_lookup) { + fuse_cleanup_submount_lookup(fc, fi->submount_lookup); + fi->submount_lookup = NULL; + } } if (S_ISREG(inode->i_mode) && !fuse_is_bad(inode)) { WARN_ON(!list_empty(&fi->write_files)); @@ -330,6 +365,13 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, fuse_dax_dontcache(inode, attr->flags); } +static void fuse_init_submount_lookup(struct fuse_submount_lookup *sl, + u64 nodeid) +{ + sl->nodeid = nodeid; + refcount_set(&sl->count, 1); +} + static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr, struct fuse_conn *fc) { @@ -392,12 +434,22 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, */ if (fc->auto_submounts && (attr->flags & FUSE_ATTR_SUBMOUNT) && S_ISDIR(attr->mode)) { + struct fuse_inode *fi; + inode = new_inode(sb); if (!inode) return NULL; fuse_init_inode(inode, attr, fc); - get_fuse_inode(inode)->nodeid = nodeid; + fi = get_fuse_inode(inode); + fi->nodeid = nodeid; + fi->submount_lookup = fuse_alloc_submount_lookup(); + if (!fi->submount_lookup) { + iput(inode); + return NULL; + } + /* Sets nlookup = 1 on fi->submount_lookup->nlookup */ + fuse_init_submount_lookup(fi->submount_lookup, nodeid); inode->i_flags |= S_AUTOMOUNT; goto done; } @@ -420,11 +472,11 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, iput(inode); goto retry; } -done: fi = get_fuse_inode(inode); spin_lock(&fi->lock); fi->nlookup++; spin_unlock(&fi->lock); +done: fuse_change_attributes(inode, attr, NULL, attr_valid, attr_version); return inode; @@ -1465,6 +1517,8 @@ static int fuse_fill_super_submount(struct super_block *sb, struct super_block *parent_sb = parent_fi->inode.i_sb; struct fuse_attr root_attr; struct inode *root; + struct fuse_submount_lookup *sl; + struct fuse_inode *fi; fuse_sb_defaults(sb); fm->sb = sb; @@ -1487,12 +1541,27 @@ static int fuse_fill_super_submount(struct super_block *sb, * its nlookup should not be incremented. fuse_iget() does * that, though, so undo it here. */ - get_fuse_inode(root)->nlookup--; + fi = get_fuse_inode(root); + fi->nlookup--; + sb->s_d_op = &fuse_dentry_operations; sb->s_root = d_make_root(root); if (!sb->s_root) return -ENOMEM; + /* + * Grab the parent's submount_lookup pointer and take a + * reference on the shared nlookup from the parent. This is to + * prevent the last forget for this nodeid from getting + * triggered until all users have finished with it. + */ + sl = parent_fi->submount_lookup; + WARN_ON(!sl); + if (sl) { + refcount_inc(&sl->count); + fi->submount_lookup = sl; + } + return 0; }

2 years

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FAILED: patch "[PATCH] fuse: share lookup state between submount and its parent" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x c4d361f66ac91db8fc65061a9671682f61f4ca9d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023121707-fidgety-tingle-3302@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: c4d361f66ac9 ("fuse: share lookup state between submount and its parent") 972f4c46d0a1 ("fuse: cache btime") d3045530bdd2 ("fuse: implement statx") 9dc10a54abe5 ("fuse: add ATTR_TIMEOUT macro") 8d8f9c4b8df6 ("fuse: handle empty request_mask in statx") e78662e818f9 ("fuse: add a new fuse init flag to relax restrictions in no cache mode") 5cadfbd5a11e ("fuse: add feature flag for expire-only") d40b2f4c94f2 ("Merge tag 'fuse-update-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c4d361f66ac91db8fc65061a9671682f61f4ca9d Mon Sep 17 00:00:00 2001 From: Krister Johansen <kjlx(a)templeofstupid.com> Date: Fri, 3 Nov 2023 10:39:47 -0700 Subject: [PATCH] fuse: share lookup state between submount and its parent Fuse submounts do not perform a lookup for the nodeid that they inherit from their parent. Instead, the code decrements the nlookup on the submount's fuse_inode when it is instantiated, and no forget is performed when a submount root is evicted. Trouble arises when the submount's parent is evicted despite the submount itself being in use. In this author's case, the submount was in a container and deatched from the initial mount namespace via a MNT_DEATCH operation. When memory pressure triggered the shrinker, the inode from the parent was evicted, which triggered enough forgets to render the submount's nodeid invalid. Since submounts should still function, even if their parent goes away, solve this problem by sharing refcounted state between the parent and its submount. When all of the references on this shared state reach zero, it's safe to forget the final lookup of the fuse nodeid. Signed-off-by: Krister Johansen <kjlx(a)templeofstupid.com> Cc: stable(a)vger.kernel.org Fixes: 1866d779d5d2 ("fuse: Allow fuse_fill_super_common() for submounts") Signed-off-by: Miklos Szeredi <mszeredi(a)redhat.com> diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 69bcffaf4832..1df83eebda92 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -63,6 +63,19 @@ struct fuse_forget_link { struct fuse_forget_link *next; }; +/* Submount lookup tracking */ +struct fuse_submount_lookup { + /** Refcount */ + refcount_t count; + + /** Unique ID, which identifies the inode between userspace + * and kernel */ + u64 nodeid; + + /** The request used for sending the FORGET message */ + struct fuse_forget_link *forget; +}; + /** FUSE inode */ struct fuse_inode { /** Inode data */ @@ -158,6 +171,8 @@ struct fuse_inode { */ struct fuse_inode_dax *dax; #endif + /** Submount specific lookup tracking */ + struct fuse_submount_lookup *submount_lookup; }; /** FUSE inode state bits */ diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 88090c6026a7..2a6d44f91729 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -68,6 +68,24 @@ struct fuse_forget_link *fuse_alloc_forget(void) return kzalloc(sizeof(struct fuse_forget_link), GFP_KERNEL_ACCOUNT); } +static struct fuse_submount_lookup *fuse_alloc_submount_lookup(void) +{ + struct fuse_submount_lookup *sl; + + sl = kzalloc(sizeof(struct fuse_submount_lookup), GFP_KERNEL_ACCOUNT); + if (!sl) + return NULL; + sl->forget = fuse_alloc_forget(); + if (!sl->forget) + goto out_free; + + return sl; + +out_free: + kfree(sl); + return NULL; +} + static struct inode *fuse_alloc_inode(struct super_block *sb) { struct fuse_inode *fi; @@ -83,6 +101,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) fi->attr_version = 0; fi->orig_ino = 0; fi->state = 0; + fi->submount_lookup = NULL; mutex_init(&fi->mutex); spin_lock_init(&fi->lock); fi->forget = fuse_alloc_forget(); @@ -113,6 +132,17 @@ static void fuse_free_inode(struct inode *inode) kmem_cache_free(fuse_inode_cachep, fi); } +static void fuse_cleanup_submount_lookup(struct fuse_conn *fc, + struct fuse_submount_lookup *sl) +{ + if (!refcount_dec_and_test(&sl->count)) + return; + + fuse_queue_forget(fc, sl->forget, sl->nodeid, 1); + sl->forget = NULL; + kfree(sl); +} + static void fuse_evict_inode(struct inode *inode) { struct fuse_inode *fi = get_fuse_inode(inode); @@ -132,6 +162,11 @@ static void fuse_evict_inode(struct inode *inode) fi->nlookup); fi->forget = NULL; } + + if (fi->submount_lookup) { + fuse_cleanup_submount_lookup(fc, fi->submount_lookup); + fi->submount_lookup = NULL; + } } if (S_ISREG(inode->i_mode) && !fuse_is_bad(inode)) { WARN_ON(!list_empty(&fi->write_files)); @@ -330,6 +365,13 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, fuse_dax_dontcache(inode, attr->flags); } +static void fuse_init_submount_lookup(struct fuse_submount_lookup *sl, + u64 nodeid) +{ + sl->nodeid = nodeid; + refcount_set(&sl->count, 1); +} + static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr, struct fuse_conn *fc) { @@ -392,12 +434,22 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, */ if (fc->auto_submounts && (attr->flags & FUSE_ATTR_SUBMOUNT) && S_ISDIR(attr->mode)) { + struct fuse_inode *fi; + inode = new_inode(sb); if (!inode) return NULL; fuse_init_inode(inode, attr, fc); - get_fuse_inode(inode)->nodeid = nodeid; + fi = get_fuse_inode(inode); + fi->nodeid = nodeid; + fi->submount_lookup = fuse_alloc_submount_lookup(); + if (!fi->submount_lookup) { + iput(inode); + return NULL; + } + /* Sets nlookup = 1 on fi->submount_lookup->nlookup */ + fuse_init_submount_lookup(fi->submount_lookup, nodeid); inode->i_flags |= S_AUTOMOUNT; goto done; } @@ -420,11 +472,11 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, iput(inode); goto retry; } -done: fi = get_fuse_inode(inode); spin_lock(&fi->lock); fi->nlookup++; spin_unlock(&fi->lock); +done: fuse_change_attributes(inode, attr, NULL, attr_valid, attr_version); return inode; @@ -1465,6 +1517,8 @@ static int fuse_fill_super_submount(struct super_block *sb, struct super_block *parent_sb = parent_fi->inode.i_sb; struct fuse_attr root_attr; struct inode *root; + struct fuse_submount_lookup *sl; + struct fuse_inode *fi; fuse_sb_defaults(sb); fm->sb = sb; @@ -1487,12 +1541,27 @@ static int fuse_fill_super_submount(struct super_block *sb, * its nlookup should not be incremented. fuse_iget() does * that, though, so undo it here. */ - get_fuse_inode(root)->nlookup--; + fi = get_fuse_inode(root); + fi->nlookup--; + sb->s_d_op = &fuse_dentry_operations; sb->s_root = d_make_root(root); if (!sb->s_root) return -ENOMEM; + /* + * Grab the parent's submount_lookup pointer and take a + * reference on the shared nlookup from the parent. This is to + * prevent the last forget for this nodeid from getting + * triggered until all users have finished with it. + */ + sl = parent_fi->submount_lookup; + WARN_ON(!sl); + if (sl) { + refcount_inc(&sl->count); + fi->submount_lookup = sl; + } + return 0; }

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