May 2024 - Linux-stable-mirror

Payment Advice Bank Transfer/Wire REF: {SCB/ 817#/B}

by Standard Chartered Bank

7 months, 3 weeks

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[PATCH] drm/i915/dpt: Make DPT object unshrinkable

by Vidya Srinivas

In some scenarios, the DPT object gets shrunk but the actual framebuffer did not and thus its still there on the DPT's vm->bound_list. Then it tries to rewrite the PTEs via a stale CPU mapping. This causes panic. Credits-to: Ville Syrjala <ville.syrjala(a)linux.intel.com> Shawn Lee <shawn.c.lee(a)intel.com> Cc: stable(a)vger.kernel.org Fixes: 0dc987b699ce ("drm/i915/display: Add smem fallback allocation for dpt") Signed-off-by: Vidya Srinivas <vidya.srinivas(a)intel.com> --- drivers/gpu/drm/i915/gem/i915_gem_object.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h index 3560a062d287..e6b485fc54d4 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -284,7 +284,8 @@ bool i915_gem_object_has_iomem(const struct drm_i915_gem_object *obj); static inline bool i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj) { - return i915_gem_object_type_has(obj, I915_GEM_OBJECT_IS_SHRINKABLE); + return i915_gem_object_type_has(obj, I915_GEM_OBJECT_IS_SHRINKABLE) && + !obj->is_dpt; } static inline bool -- 2.34.1

7 months, 3 weeks

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[PATCH] md: fix kmemleak of rdev->serial

by Jeremy Bongio

From: Li Nan <linan122(a)huawei.com> commit 6cf350658736681b9d6b0b6e58c5c76b235bb4c4 upstream. If kobject_add() is fail in bind_rdev_to_array(), 'rdev->serial' will be alloc not be freed, and kmemleak occurs. unreferenced object 0xffff88815a350000 (size 49152): comm "mdadm", pid 789, jiffies 4294716910 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc f773277a): [<0000000058b0a453>] kmemleak_alloc+0x61/0xe0 [<00000000366adf14>] __kmalloc_large_node+0x15e/0x270 [<000000002e82961b>] __kmalloc_node.cold+0x11/0x7f [<00000000f206d60a>] kvmalloc_node+0x74/0x150 [<0000000034bf3363>] rdev_init_serial+0x67/0x170 [<0000000010e08fe9>] mddev_create_serial_pool+0x62/0x220 [<00000000c3837bf0>] bind_rdev_to_array+0x2af/0x630 [<0000000073c28560>] md_add_new_disk+0x400/0x9f0 [<00000000770e30ff>] md_ioctl+0x15bf/0x1c10 [<000000006cfab718>] blkdev_ioctl+0x191/0x3f0 [<0000000085086a11>] vfs_ioctl+0x22/0x60 [<0000000018b656fe>] __x64_sys_ioctl+0xba/0xe0 [<00000000e54e675e>] do_syscall_64+0x71/0x150 [<000000008b0ad622>] entry_SYSCALL_64_after_hwframe+0x6c/0x74 backport change: mddev_destroy_serial_pool third parameter was removed in mainline, where there is no need to suspend within this function anymore. Fixes: 963c555e75b0 ("md: introduce mddev_create/destroy_wb_pool for the change of member device") Signed-off-by: Li Nan <linan122(a)huawei.com> Signed-off-by: Song Liu <song(a)kernel.org> Link: https://lore.kernel.org/r/20240208085556.2412922-1-linan666@huaweicloud.com Signed-off-by: Jeremy Bongio <jbongio(a)google.com> --- This backport is tested on LTS 5.10, 6.1, 6.6 drivers/md/md.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 09c7f52156f3f..67ceab4573be4 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2532,6 +2532,7 @@ static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) fail: pr_warn("md: failed to register dev-%s for %s\n", b, mdname(mddev)); + mddev_destroy_serial_pool(mddev, rdev, false); return err; } -- 2.45.0.118.g7fe29c98d7-goog

7 months, 3 weeks

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[PATCH v2 2/2] KEYS: trusted: Do not use WARN when encode fails

by Jarkko Sakkinen

When asn1_encode_sequence() fails, WARN is not the correct solution. 1. asn1_encode_sequence() is not an internal function (located in lib/asn1_encode.c). 2. Location is known, which makes the stack trace useless. 3. Results a crash if panic_on_warn is set. It is also noteworthy that the use of WARN is undocumented, and it should be avoided unless there is a carefully considered rationale to use it. Replace WARN with pr_err, and print the return value instead, which is only useful piece of information. Cc: stable(a)vger.kernel.org # v5.13+ Fixes: f2219745250f ("security: keys: trusted: use ASN.1 TPM2 key format for the blobs") Signed-off-by: Jarkko Sakkinen <jarkko(a)kernel.org> --- security/keys/trusted-keys/trusted_tpm2.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/security/keys/trusted-keys/trusted_tpm2.c b/security/keys/trusted-keys/trusted_tpm2.c index c6882f5d094f..8b7dd73d94c1 100644 --- a/security/keys/trusted-keys/trusted_tpm2.c +++ b/security/keys/trusted-keys/trusted_tpm2.c @@ -84,8 +84,9 @@ static int tpm2_key_encode(struct trusted_key_payload *payload, work1 = payload->blob; work1 = asn1_encode_sequence(work1, work1 + sizeof(payload->blob), scratch, work - scratch); - if (WARN(IS_ERR(work1), "BUG: ASN.1 encoder failed")) { + if (IS_ERR(work1)) { ret = PTR_ERR(work1); + pr_err("BUG: ASN.1 encoder failed with %d\n", ret); goto err; } -- 2.45.1

7 months, 3 weeks

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[PATCH v2 1/2] KEYS: trusted: Fix memory leak in tpm2_key_encode()

by Jarkko Sakkinen

'scratch' is never freed. Fix this by calling kfree() in the success, and in the error case. Cc: stable(a)vger.kernel.org # +v5.13 Fixes: f2219745250f ("security: keys: trusted: use ASN.1 TPM2 key format for the blobs") Signed-off-by: Jarkko Sakkinen <jarkko(a)kernel.org> --- security/keys/trusted-keys/trusted_tpm2.c | 24 +++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/security/keys/trusted-keys/trusted_tpm2.c b/security/keys/trusted-keys/trusted_tpm2.c index dfeec06301ce..c6882f5d094f 100644 --- a/security/keys/trusted-keys/trusted_tpm2.c +++ b/security/keys/trusted-keys/trusted_tpm2.c @@ -38,6 +38,7 @@ static int tpm2_key_encode(struct trusted_key_payload *payload, u8 *end_work = scratch + SCRATCH_SIZE; u8 *priv, *pub; u16 priv_len, pub_len; + int ret; priv_len = get_unaligned_be16(src) + 2; priv = src; @@ -57,8 +58,10 @@ static int tpm2_key_encode(struct trusted_key_payload *payload, unsigned char bool[3], *w = bool; /* tag 0 is emptyAuth */ w = asn1_encode_boolean(w, w + sizeof(bool), true); - if (WARN(IS_ERR(w), "BUG: Boolean failed to encode")) - return PTR_ERR(w); + if (WARN(IS_ERR(w), "BUG: Boolean failed to encode")) { + ret = PTR_ERR(w); + goto err; + } work = asn1_encode_tag(work, end_work, 0, bool, w - bool); } @@ -69,8 +72,10 @@ static int tpm2_key_encode(struct trusted_key_payload *payload, * trigger, so if it does there's something nefarious going on */ if (WARN(work - scratch + pub_len + priv_len + 14 > SCRATCH_SIZE, - "BUG: scratch buffer is too small")) - return -EINVAL; + "BUG: scratch buffer is too small")) { + ret = -EINVAL; + goto err; + } work = asn1_encode_integer(work, end_work, options->keyhandle); work = asn1_encode_octet_string(work, end_work, pub, pub_len); @@ -79,10 +84,17 @@ static int tpm2_key_encode(struct trusted_key_payload *payload, work1 = payload->blob; work1 = asn1_encode_sequence(work1, work1 + sizeof(payload->blob), scratch, work - scratch); - if (WARN(IS_ERR(work1), "BUG: ASN.1 encoder failed")) - return PTR_ERR(work1); + if (WARN(IS_ERR(work1), "BUG: ASN.1 encoder failed")) { + ret = PTR_ERR(work1); + goto err; + } + kfree(scratch); return work1 - payload->blob; + +err: + kfree(scratch); + return ret; } struct tpm2_key_context { -- 2.45.1

7 months, 3 weeks

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[PATCH] erofs: avoid allocating DEFLATE streams before mounting

by Gao Xiang

Currently, each DEFLATE stream takes one 32 KiB permanent internal window buffer even if there is no running instance which uses DEFLATE algorithm. It's unexpected and wasteful on embedded devices with limited resources and servers with hundreds of CPU cores if DEFLATE is enabled but unused. Fixes: ffa09b3bd024 ("erofs: DEFLATE compression support") Cc: <stable(a)vger.kernel.org> # 6.6+ Signed-off-by: Gao Xiang <hsiangkao(a)linux.alibaba.com> --- fs/erofs/decompressor_deflate.c | 55 +++++++++++++++++---------------- 1 file changed, 29 insertions(+), 26 deletions(-) diff --git a/fs/erofs/decompressor_deflate.c b/fs/erofs/decompressor_deflate.c index 81e65c453ef0..3a3461561a3c 100644 --- a/fs/erofs/decompressor_deflate.c +++ b/fs/erofs/decompressor_deflate.c @@ -46,39 +46,15 @@ int __init z_erofs_deflate_init(void) /* by default, use # of possible CPUs instead */ if (!z_erofs_deflate_nstrms) z_erofs_deflate_nstrms = num_possible_cpus(); - - for (; z_erofs_deflate_avail_strms < z_erofs_deflate_nstrms; - ++z_erofs_deflate_avail_strms) { - struct z_erofs_deflate *strm; - - strm = kzalloc(sizeof(*strm), GFP_KERNEL); - if (!strm) - goto out_failed; - - /* XXX: in-kernel zlib cannot shrink windowbits currently */ - strm->z.workspace = vmalloc(zlib_inflate_workspacesize()); - if (!strm->z.workspace) { - kfree(strm); - goto out_failed; - } - - spin_lock(&z_erofs_deflate_lock); - strm->next = z_erofs_deflate_head; - z_erofs_deflate_head = strm; - spin_unlock(&z_erofs_deflate_lock); - } return 0; - -out_failed: - erofs_err(NULL, "failed to allocate zlib workspace"); - z_erofs_deflate_exit(); - return -ENOMEM; } int z_erofs_load_deflate_config(struct super_block *sb, struct erofs_super_block *dsb, void *data, int size) { struct z_erofs_deflate_cfgs *dfl = data; + static DEFINE_MUTEX(deflate_resize_mutex); + static bool inited; if (!dfl || size < sizeof(struct z_erofs_deflate_cfgs)) { erofs_err(sb, "invalid deflate cfgs, size=%u", size); @@ -89,9 +65,36 @@ int z_erofs_load_deflate_config(struct super_block *sb, erofs_err(sb, "unsupported windowbits %u", dfl->windowbits); return -EOPNOTSUPP; } + mutex_lock(&deflate_resize_mutex); + if (!inited) { + for (; z_erofs_deflate_avail_strms < z_erofs_deflate_nstrms; + ++z_erofs_deflate_avail_strms) { + struct z_erofs_deflate *strm; + + strm = kzalloc(sizeof(*strm), GFP_KERNEL); + if (!strm) + goto failed; + /* XXX: in-kernel zlib cannot customize windowbits */ + strm->z.workspace = vmalloc(zlib_inflate_workspacesize()); + if (!strm->z.workspace) { + kfree(strm); + goto failed; + } + spin_lock(&z_erofs_deflate_lock); + strm->next = z_erofs_deflate_head; + z_erofs_deflate_head = strm; + spin_unlock(&z_erofs_deflate_lock); + } + inited = true; + } + mutex_unlock(&deflate_resize_mutex); erofs_info(sb, "EXPERIMENTAL DEFLATE feature in use. Use at your own risk!"); return 0; +failed: + mutex_unlock(&deflate_resize_mutex); + z_erofs_deflate_exit(); + return -ENOMEM; } int z_erofs_deflate_decompress(struct z_erofs_decompress_req *rq, -- 2.39.3

7 months, 3 weeks

2
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[PATCH 5/5] nbd: Fix signal handling

by Bart Van Assche

Both nbd_send_cmd() and nbd_handle_cmd() return either a negative error number or a positive blk_status_t value. nbd_queue_rq() converts these return values into a blk_status_t value. There is a bug in the conversion code: if nbd_send_cmd() returns BLK_STS_RESOURCE, nbd_queue_rq() should return BLK_STS_RESOURCE instead of BLK_STS_OK. Fix this, move the conversion code into nbd_handle_cmd() and fix the remaining sparse warnings. This patch fixes the following sparse warnings: drivers/block/nbd.c:673:32: warning: incorrect type in return expression (different base types) drivers/block/nbd.c:673:32: expected int drivers/block/nbd.c:673:32: got restricted blk_status_t [usertype] drivers/block/nbd.c:714:48: warning: incorrect type in return expression (different base types) drivers/block/nbd.c:714:48: expected int drivers/block/nbd.c:714:48: got restricted blk_status_t [usertype] drivers/block/nbd.c:1120:21: warning: incorrect type in assignment (different base types) drivers/block/nbd.c:1120:21: expected int [assigned] ret drivers/block/nbd.c:1120:21: got restricted blk_status_t [usertype] drivers/block/nbd.c:1125:16: warning: incorrect type in return expression (different base types) drivers/block/nbd.c:1125:16: expected restricted blk_status_t drivers/block/nbd.c:1125:16: got int [assigned] ret Cc: Christoph Hellwig <hch(a)lst.de> Cc: Josef Bacik <jbacik(a)fb.com> Cc: Yu Kuai <yukuai3(a)huawei.com> Cc: Markus Pargmann <mpa(a)pengutronix.de> Fixes: fc17b6534eb8 ("blk-mq: switch ->queue_rq return value to blk_status_t") Cc: stable(a)vger.kernel.org Signed-off-by: Bart Van Assche <bvanassche(a)acm.org> --- drivers/block/nbd.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 29e43ab1650c..22a79a62cc4e 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -588,6 +588,10 @@ static inline int was_interrupted(int result) return result == -ERESTARTSYS || result == -EINTR; } +/* + * Returns BLK_STS_RESOURCE if the caller should retry after a delay. Returns + * -EAGAIN if the caller should requeue @cmd. Returns -EIO if sending failed. + */ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index) { struct request *req = blk_mq_rq_from_pdu(cmd); @@ -670,7 +674,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index) nsock->sent = sent; } set_bit(NBD_CMD_REQUEUED, &cmd->flags); - return BLK_STS_RESOURCE; + return (__force int)BLK_STS_RESOURCE; } dev_err_ratelimited(disk_to_dev(nbd->disk), "Send control failed (result %d)\n", result); @@ -711,7 +715,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index) nsock->pending = req; nsock->sent = sent; set_bit(NBD_CMD_REQUEUED, &cmd->flags); - return BLK_STS_RESOURCE; + return (__force int)BLK_STS_RESOURCE; } dev_err(disk_to_dev(nbd->disk), "Send data failed (result %d)\n", @@ -1008,7 +1012,7 @@ static int wait_for_reconnect(struct nbd_device *nbd) return !test_bit(NBD_RT_DISCONNECTED, &config->runtime_flags); } -static int nbd_handle_cmd(struct nbd_cmd *cmd, int index) +static blk_status_t nbd_handle_cmd(struct nbd_cmd *cmd, int index) { struct request *req = blk_mq_rq_from_pdu(cmd); struct nbd_device *nbd = cmd->nbd; @@ -1022,14 +1026,14 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index) if (!config) { dev_err_ratelimited(disk_to_dev(nbd->disk), "Socks array is empty\n"); - return -EINVAL; + return BLK_STS_IOERR; } if (index >= config->num_connections) { dev_err_ratelimited(disk_to_dev(nbd->disk), "Attempted send on invalid socket\n"); nbd_config_put(nbd); - return -EINVAL; + return BLK_STS_IOERR; } cmd->status = BLK_STS_OK; again: @@ -1052,7 +1056,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index) */ sock_shutdown(nbd); nbd_config_put(nbd); - return -EIO; + return BLK_STS_IOERR; } goto again; } @@ -1065,7 +1069,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index) blk_mq_start_request(req); if (unlikely(nsock->pending && nsock->pending != req)) { nbd_requeue_cmd(cmd); - ret = 0; + ret = BLK_STS_OK; goto out; } /* @@ -1084,19 +1088,19 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index) "Request send failed, requeueing\n"); nbd_mark_nsock_dead(nbd, nsock, 1); nbd_requeue_cmd(cmd); - ret = 0; + ret = BLK_STS_OK; } out: mutex_unlock(&nsock->tx_lock); nbd_config_put(nbd); - return ret; + return ret < 0 ? BLK_STS_IOERR : (__force blk_status_t)ret; } static blk_status_t nbd_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { struct nbd_cmd *cmd = blk_mq_rq_to_pdu(bd->rq); - int ret; + blk_status_t ret; /* * Since we look at the bio's to send the request over the network we @@ -1116,10 +1120,6 @@ static blk_status_t nbd_queue_rq(struct blk_mq_hw_ctx *hctx, * appropriate. */ ret = nbd_handle_cmd(cmd, hctx->queue_num); - if (ret < 0) - ret = BLK_STS_IOERR; - else if (!ret) - ret = BLK_STS_OK; mutex_unlock(&cmd->lock); return ret;

7 months, 3 weeks

2
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[PATCH v2 4/7] HID: i2c-hid: elan: fix reset suspend current leakage

by Johan Hovold

The Elan eKTH5015M touch controller found on the Lenovo ThinkPad X13s shares the VCC33 supply with other peripherals that may remain powered during suspend (e.g. when enabled as wakeup sources). The reset line is also wired so that it can be left deasserted when the supply is off. This is important as it avoids holding the controller in reset for extended periods of time when it remains powered, which can lead to increased power consumption, and also avoids leaking current through the X13s reset circuitry during suspend (and after driver unbind). Use the new 'no-reset-on-power-off' devicetree property to determine when reset needs to be asserted on power down. Notably this also avoids wasting power on machine variants without a touchscreen for which the driver would otherwise exit probe with reset asserted. Fixes: bd3cba00dcc6 ("HID: i2c-hid: elan: Add support for Elan eKTH6915 i2c-hid touchscreens") Cc: stable(a)vger.kernel.org # 6.0 Cc: Douglas Anderson <dianders(a)chromium.org> Tested-by: Steev Klimaszewski <steev(a)kali.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- drivers/hid/i2c-hid/i2c-hid-of-elan.c | 59 +++++++++++++++++++++------ 1 file changed, 47 insertions(+), 12 deletions(-) diff --git a/drivers/hid/i2c-hid/i2c-hid-of-elan.c b/drivers/hid/i2c-hid/i2c-hid-of-elan.c index 5b91fb106cfc..091e37933225 100644 --- a/drivers/hid/i2c-hid/i2c-hid-of-elan.c +++ b/drivers/hid/i2c-hid/i2c-hid-of-elan.c @@ -31,6 +31,7 @@ struct i2c_hid_of_elan { struct regulator *vcc33; struct regulator *vccio; struct gpio_desc *reset_gpio; + bool no_reset_on_power_off; const struct elan_i2c_hid_chip_data *chip_data; }; @@ -40,17 +41,17 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops) container_of(ops, struct i2c_hid_of_elan, ops); int ret; + gpiod_set_value_cansleep(ihid_elan->reset_gpio, 1); + if (ihid_elan->vcc33) { ret = regulator_enable(ihid_elan->vcc33); if (ret) - return ret; + goto err_deassert_reset; } ret = regulator_enable(ihid_elan->vccio); - if (ret) { - regulator_disable(ihid_elan->vcc33); - return ret; - } + if (ret) + goto err_disable_vcc33; if (ihid_elan->chip_data->post_power_delay_ms) msleep(ihid_elan->chip_data->post_power_delay_ms); @@ -60,6 +61,15 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops) msleep(ihid_elan->chip_data->post_gpio_reset_on_delay_ms); return 0; + +err_disable_vcc33: + if (ihid_elan->vcc33) + regulator_disable(ihid_elan->vcc33); +err_deassert_reset: + if (ihid_elan->no_reset_on_power_off) + gpiod_set_value_cansleep(ihid_elan->reset_gpio, 0); + + return ret; } static void elan_i2c_hid_power_down(struct i2chid_ops *ops) @@ -67,7 +77,14 @@ static void elan_i2c_hid_power_down(struct i2chid_ops *ops) struct i2c_hid_of_elan *ihid_elan = container_of(ops, struct i2c_hid_of_elan, ops); - gpiod_set_value_cansleep(ihid_elan->reset_gpio, 1); + /* + * Do not assert reset when the hardware allows for it to remain + * deasserted regardless of the state of the (shared) power supply to + * avoid wasting power when the supply is left on. + */ + if (!ihid_elan->no_reset_on_power_off) + gpiod_set_value_cansleep(ihid_elan->reset_gpio, 1); + if (ihid_elan->chip_data->post_gpio_reset_off_delay_ms) msleep(ihid_elan->chip_data->post_gpio_reset_off_delay_ms); @@ -79,6 +96,7 @@ static void elan_i2c_hid_power_down(struct i2chid_ops *ops) static int i2c_hid_of_elan_probe(struct i2c_client *client) { struct i2c_hid_of_elan *ihid_elan; + int ret; ihid_elan = devm_kzalloc(&client->dev, sizeof(*ihid_elan), GFP_KERNEL); if (!ihid_elan) @@ -93,21 +111,38 @@ static int i2c_hid_of_elan_probe(struct i2c_client *client) if (IS_ERR(ihid_elan->reset_gpio)) return PTR_ERR(ihid_elan->reset_gpio); + ihid_elan->no_reset_on_power_off = of_property_read_bool(client->dev.of_node, + "no-reset-on-power-off"); + ihid_elan->vccio = devm_regulator_get(&client->dev, "vccio"); - if (IS_ERR(ihid_elan->vccio)) - return PTR_ERR(ihid_elan->vccio); + if (IS_ERR(ihid_elan->vccio)) { + ret = PTR_ERR(ihid_elan->vccio); + goto err_deassert_reset; + } ihid_elan->chip_data = device_get_match_data(&client->dev); if (ihid_elan->chip_data->main_supply_name) { ihid_elan->vcc33 = devm_regulator_get(&client->dev, ihid_elan->chip_data->main_supply_name); - if (IS_ERR(ihid_elan->vcc33)) - return PTR_ERR(ihid_elan->vcc33); + if (IS_ERR(ihid_elan->vcc33)) { + ret = PTR_ERR(ihid_elan->vcc33); + goto err_deassert_reset; + } } - return i2c_hid_core_probe(client, &ihid_elan->ops, - ihid_elan->chip_data->hid_descriptor_address, 0); + ret = i2c_hid_core_probe(client, &ihid_elan->ops, + ihid_elan->chip_data->hid_descriptor_address, 0); + if (ret) + goto err_deassert_reset; + + return 0; + +err_deassert_reset: + if (ihid_elan->no_reset_on_power_off) + gpiod_set_value_cansleep(ihid_elan->reset_gpio, 0); + + return ret; } static const struct elan_i2c_hid_chip_data elan_ekth6915_chip_data = { -- 2.43.2

7 months, 3 weeks

3
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[PATCH] wifi: ath10k: fix QCOM_RPROC_COMMON dependency

by Dmitry Baryshkov

If ath10k_snoc is built-in, while Qualcomm remoteprocs are built as modules, compilation fails with: /usr/bin/aarch64-linux-gnu-ld: drivers/net/wireless/ath/ath10k/snoc.o: in function `ath10k_modem_init': drivers/net/wireless/ath/ath10k/snoc.c:1534: undefined reference to `qcom_register_ssr_notifier' /usr/bin/aarch64-linux-gnu-ld: drivers/net/wireless/ath/ath10k/snoc.o: in function `ath10k_modem_deinit': drivers/net/wireless/ath/ath10k/snoc.c:1551: undefined reference to `qcom_unregister_ssr_notifier' Add corresponding dependency to ATH10K_SNOC Kconfig entry so that it's built as module if QCOM_RPROC_COMMON is built as module too. Fixes: 747ff7d3d742 ("ath10k: Don't always treat modem stop events as crashes") Cc: stable(a)vger.kernel.org Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org> --- drivers/net/wireless/ath/ath10k/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath10k/Kconfig b/drivers/net/wireless/ath/ath10k/Kconfig index e6ea884cafc1..4f385f4a8cef 100644 --- a/drivers/net/wireless/ath/ath10k/Kconfig +++ b/drivers/net/wireless/ath/ath10k/Kconfig @@ -45,6 +45,7 @@ config ATH10K_SNOC depends on ATH10K depends on ARCH_QCOM || COMPILE_TEST depends on QCOM_SMEM + depends on QCOM_RPROC_COMMON || QCOM_RPROC_COMMON=n select QCOM_SCM select QCOM_QMI_HELPERS help --- base-commit: 75fa778d74b786a1608d55d655d42b480a6fa8bd change-id: 20240511-ath10k-snoc-dep-862a9da2e6bb Best regards, -- Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org>

7 months, 3 weeks

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[PATCH 2/2] selftests/mm: compaction_test: Fix trivial test success and reduce probability of OOM-killer invocation

by Dev Jain

Reset nr_hugepages to zero before the start of the test. If a non-zero number of hugepages is already set before the start of the test, the following problems arise: - The probability of the test getting OOM-killed increases. Proof: The test wants to run on 80% of available memory to prevent OOM-killing (see original code comments). Let the value of mem_free at the start of the test, when nr_hugepages = 0, be x. In the other case, when nr_hugepages > 0, let the memory consumed by hugepages be y. In the former case, the test operates on 0.8 * x of memory. In the latter, the test operates on 0.8 * (x - y) of memory, with y already filled, hence, memory consumed is y + 0.8 * (x - y) = 0.8 * x + 0.2 * y > 0.8 * x. Q.E.D - The probability of a bogus test success increases. Proof: Let the memory consumed by hugepages be greater than 25% of x, with x and y defined as above. The definition of compaction_index is c_index = (x - y)/z where z is the memory consumed by hugepages after trying to increase them again. In check_compaction(), we set the number of hugepages to zero, and then increase them back; the probability that they will be set back to consume at least y amount of memory again is very high (since there is not much delay between the two attempts of changing nr_hugepages). Hence, z >= y > (x/4) (by the 25% assumption). Therefore, c_index = (x - y)/z <= (x - y)/y = x/y - 1 < 4 - 1 = 3 hence, c_index can always be forced to be less than 3, thereby the test succeeding always. Q.E.D NOTE: This patch depends on the previous one. Fixes: bd67d5c15cc1 ("Test compaction of mlocked memory") Cc: stable(a)vger.kernel.org Signed-off-by: Dev Jain <dev.jain(a)arm.com> --- tools/testing/selftests/mm/compaction_test.c | 72 ++++++++++++++------ 1 file changed, 50 insertions(+), 22 deletions(-) diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c index c5be395f8363..2ae059989771 100644 --- a/tools/testing/selftests/mm/compaction_test.c +++ b/tools/testing/selftests/mm/compaction_test.c @@ -82,12 +82,15 @@ int prereq(void) return -1; } -int check_compaction(unsigned long mem_free, unsigned int hugepage_size) +int check_compaction(unsigned long mem_free, unsigned int hugepage_size, + int initial_nr_hugepages) { int fd, ret = -1; int compaction_index = 0; - char initial_nr_hugepages[10] = {0}; char nr_hugepages[10] = {0}; + char init_nr_hugepages[10] = {0}; + + sprintf(init_nr_hugepages, "%d", initial_nr_hugepages); /* We want to test with 80% of available memory. Else, OOM killer comes in to play */ @@ -101,23 +104,6 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size) goto out; } - if (read(fd, initial_nr_hugepages, sizeof(initial_nr_hugepages)) <= 0) { - ksft_print_msg("Failed to read from /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); - goto close_fd; - } - - lseek(fd, 0, SEEK_SET); - - /* Start with the initial condition of 0 huge pages*/ - if (write(fd, "0", sizeof(char)) != sizeof(char)) { - ksft_print_msg("Failed to write 0 to /proc/sys/vm/nr_hugepages: %s\n", - strerror(errno)); - goto close_fd; - } - - lseek(fd, 0, SEEK_SET); - /* Request a large number of huge pages. The Kernel will allocate as much as it can */ if (write(fd, "100000", (6*sizeof(char))) != (6*sizeof(char))) { @@ -140,8 +126,8 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size) lseek(fd, 0, SEEK_SET); - if (write(fd, initial_nr_hugepages, strlen(initial_nr_hugepages)) - != strlen(initial_nr_hugepages)) { + if (write(fd, init_nr_hugepages, strlen(init_nr_hugepages)) + != strlen(init_nr_hugepages)) { ksft_print_msg("Failed to write value to /proc/sys/vm/nr_hugepages: %s\n", strerror(errno)); goto close_fd; @@ -165,6 +151,42 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size) return ret; } +int set_zero_hugepages(int *initial_nr_hugepages) +{ + int fd, ret = -1; + char nr_hugepages[10] = {0}; + + fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK); + if (fd < 0) { + ksft_print_msg("Failed to open /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); + goto out; + } + + if (read(fd, nr_hugepages, sizeof(nr_hugepages)) <= 0) { + ksft_print_msg("Failed to read from /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); + goto close_fd; + } + + lseek(fd, 0, SEEK_SET); + + /* Start with the initial condition of 0 huge pages */ + if (write(fd, "0", sizeof(char)) != sizeof(char)) { + ksft_print_msg("Failed to write 0 to /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); + goto close_fd; + } + + *initial_nr_hugepages = atoi(nr_hugepages); + ret = 0; + + close_fd: + close(fd); + + out: + return ret; +} int main(int argc, char **argv) { @@ -175,6 +197,7 @@ int main(int argc, char **argv) unsigned long mem_free = 0; unsigned long hugepage_size = 0; long mem_fragmentable_MB = 0; + int initial_nr_hugepages; ksft_print_header(); @@ -183,6 +206,10 @@ int main(int argc, char **argv) ksft_set_plan(1); + /* start the test without hugepages reducing mem_free */ + if (set_zero_hugepages(&initial_nr_hugepages)) + return ksft_exit_fail(); + lim.rlim_cur = RLIM_INFINITY; lim.rlim_max = RLIM_INFINITY; if (setrlimit(RLIMIT_MEMLOCK, &lim)) @@ -226,7 +253,8 @@ int main(int argc, char **argv) entry = entry->next; } - if (check_compaction(mem_free, hugepage_size) == 0) + if (check_compaction(mem_free, hugepage_size, + initial_nr_hugepages) == 0) return ksft_exit_pass(); return ksft_exit_fail(); -- 2.30.2

7 months, 3 weeks

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Linux-stable-mirror May 2024