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[PATCH v4 0/3] phy: qcom: edp: Add missing ref clock to x1e80100

by Abel Vesa

According to documentation, the DP PHY on x1e80100 has another clock called ref. The current X Elite devices supported upstream work fine without this clock, because the boot firmware leaves this clock enabled. But we should not rely on that. Also, when it comes to power management, this clock needs to be also disabled on suspend. So even though this change breaks the ABI, it is needed in order to make we disable this clock on runtime PM, when that is going to be enabled in the driver. So rework the driver to allow different number of clocks, fix the dt-bindings schema and add the clock to the DT node as well. Signed-off-by: Abel Vesa <abel.vesa(a)linaro.org> --- Changes in v4: - Picked Dmitry's R-b tag for the driver patch - Added x1e80100 substring to subject of dts patch - Link to v3 (resend): https://lore.kernel.org/r/20251014-phy-qcom-edp-add-missing-refclk-v3-0-078… Changes in v3 (resend) - picked-up Krzysztof's R-b tag for bindings patch - Link to v3: https://lore.kernel.org/r/20250909-phy-qcom-edp-add-missing-refclk-v3-0-4ec… Changes in v3: - Use dev_err_probe() on clocks parsing failure. - Explain why the ABI break is necessary. - Drop the extra 'clk' suffix from the clock name. So ref instead of refclk. - Link to v2: https://lore.kernel.org/r/20250903-phy-qcom-edp-add-missing-refclk-v2-0-d88… Changes in v2: - Fix schema by adding the minItems, as suggested by Krzysztof. - Use devm_clk_bulk_get_all, as suggested by Konrad. - Rephrase the commit messages to reflect the flexible number of clocks. - Link to v1: https://lore.kernel.org/r/20250730-phy-qcom-edp-add-missing-refclk-v1-0-6f7… --- Abel Vesa (3): dt-bindings: phy: qcom-edp: Add missing clock for X Elite phy: qcom: edp: Make the number of clocks flexible arm64: dts: qcom: x1e80100: Add missing TCSR ref clock to the DP PHYs .../devicetree/bindings/phy/qcom,edp-phy.yaml | 28 +++++++++++++++++++++- arch/arm64/boot/dts/qcom/hamoa.dtsi | 12 ++++++---- drivers/phy/qualcomm/phy-qcom-edp.c | 16 ++++++------- 3 files changed, 43 insertions(+), 13 deletions(-) --- base-commit: f9ba12abc5282bf992f9a9ae87ad814fd03a0270 change-id: 20250730-phy-qcom-edp-add-missing-refclk-5ab82828f8e7 Best regards, -- Abel Vesa <abel.vesa(a)linaro.org>

4 weeks

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[PATCH v2 1/4] ASoC: cs4271: Fix cs4271 I2C and SPI drivers automatic module loading

by Herve Codina

In commit c973b8a7dc50 ("ASoC: cs4271: Split SPI and I2C code into different modules") the driver was slit into a core, an SPI and an I2C part. However, the MODULE_DEVICE_TABLE(of, cs4271_dt_ids) was in the core part and so, module loading based on module.alias (based on DT compatible string matching) loads the core part but not the SPI or I2C parts. In order to have the I2C or the SPI module loaded automatically, move the MODULE_DEVICE_TABLE(of, ...) the core to I2C and SPI parts. Also move cs4271_dt_ids itself from the core part to I2C and SPI parts as both the call to MODULE_DEVICE_TABLE(of, ...) and the cs4271_dt_ids table itself need to be in the same file. Fixes: c973b8a7dc50 ("ASoC: cs4271: Split SPI and I2C code into different modules") Cc: stable(a)vger.kernel.org Signed-off-by: Herve Codina <herve.codina(a)bootlin.com> --- sound/soc/codecs/cs4271-i2c.c | 6 ++++++ sound/soc/codecs/cs4271-spi.c | 13 +++++++++++++ sound/soc/codecs/cs4271.c | 9 --------- sound/soc/codecs/cs4271.h | 1 - 4 files changed, 19 insertions(+), 10 deletions(-) diff --git a/sound/soc/codecs/cs4271-i2c.c b/sound/soc/codecs/cs4271-i2c.c index 1d210b969173..cefb8733fc61 100644 --- a/sound/soc/codecs/cs4271-i2c.c +++ b/sound/soc/codecs/cs4271-i2c.c @@ -28,6 +28,12 @@ static const struct i2c_device_id cs4271_i2c_id[] = { }; MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id); +static const struct of_device_id cs4271_dt_ids[] = { + { .compatible = "cirrus,cs4271", }, + { } +}; +MODULE_DEVICE_TABLE(of, cs4271_dt_ids); + static struct i2c_driver cs4271_i2c_driver = { .driver = { .name = "cs4271", diff --git a/sound/soc/codecs/cs4271-spi.c b/sound/soc/codecs/cs4271-spi.c index 4feb80436bd9..28dd7b8f3507 100644 --- a/sound/soc/codecs/cs4271-spi.c +++ b/sound/soc/codecs/cs4271-spi.c @@ -23,11 +23,24 @@ static int cs4271_spi_probe(struct spi_device *spi) return cs4271_probe(&spi->dev, devm_regmap_init_spi(spi, &config)); } +static const struct spi_device_id cs4271_id_spi[] = { + { "cs4271", 0 }, + {} +}; +MODULE_DEVICE_TABLE(spi, cs4271_id_spi); + +static const struct of_device_id cs4271_dt_ids[] = { + { .compatible = "cirrus,cs4271", }, + { } +}; +MODULE_DEVICE_TABLE(of, cs4271_dt_ids); + static struct spi_driver cs4271_spi_driver = { .driver = { .name = "cs4271", .of_match_table = of_match_ptr(cs4271_dt_ids), }, + .id_table = cs4271_id_spi, .probe = cs4271_spi_probe, }; module_spi_driver(cs4271_spi_driver); diff --git a/sound/soc/codecs/cs4271.c b/sound/soc/codecs/cs4271.c index 6a3cca3d26c7..ff9c6628224c 100644 --- a/sound/soc/codecs/cs4271.c +++ b/sound/soc/codecs/cs4271.c @@ -543,15 +543,6 @@ static int cs4271_soc_resume(struct snd_soc_component *component) #define cs4271_soc_resume NULL #endif /* CONFIG_PM */ -#ifdef CONFIG_OF -const struct of_device_id cs4271_dt_ids[] = { - { .compatible = "cirrus,cs4271", }, - { } -}; -MODULE_DEVICE_TABLE(of, cs4271_dt_ids); -EXPORT_SYMBOL_GPL(cs4271_dt_ids); -#endif - static int cs4271_component_probe(struct snd_soc_component *component) { struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component); diff --git a/sound/soc/codecs/cs4271.h b/sound/soc/codecs/cs4271.h index 290283a9149e..4965ce085875 100644 --- a/sound/soc/codecs/cs4271.h +++ b/sound/soc/codecs/cs4271.h @@ -4,7 +4,6 @@ #include <linux/regmap.h> -extern const struct of_device_id cs4271_dt_ids[]; extern const struct regmap_config cs4271_regmap_config; int cs4271_probe(struct device *dev, struct regmap *regmap); -- 2.51.0

4 weeks

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[PATCH v2] Bluetooth: rfcomm: fix modem control handling

by Johan Hovold

The RFCOMM driver confuses the local and remote modem control signals, which specifically means that the reported DTR and RTS state will instead reflect the remote end (i.e. DSR and CTS). This issue dates back to the original driver (and a follow-on update) merged in 2002, which resulted in a non-standard implementation of TIOCMSET that allowed controlling also the TS07.10 IC and DV signals by mapping them to the RI and DCD input flags, while TIOCMGET failed to return the actual state of DTR and RTS. Note that the bogus control of input signals in tiocmset() is just dead code as those flags will have been masked out by the tty layer since 2003. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable(a)vger.kernel.org Signed-off-by: Johan Hovold <johan(a)kernel.org> --- Changes in v2 - fix a compilation issue discovered before sending v1 but never folded into the actual patch... net/bluetooth/rfcomm/tty.c | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 376ce6de84be..b783526ab588 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -643,8 +643,8 @@ static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig) tty_port_tty_hangup(&dev->port, true); dev->modem_status = - ((v24_sig & RFCOMM_V24_RTC) ? (TIOCM_DSR | TIOCM_DTR) : 0) | - ((v24_sig & RFCOMM_V24_RTR) ? (TIOCM_RTS | TIOCM_CTS) : 0) | + ((v24_sig & RFCOMM_V24_RTC) ? TIOCM_DSR : 0) | + ((v24_sig & RFCOMM_V24_RTR) ? TIOCM_CTS : 0) | ((v24_sig & RFCOMM_V24_IC) ? TIOCM_RI : 0) | ((v24_sig & RFCOMM_V24_DV) ? TIOCM_CD : 0); } @@ -1055,10 +1055,14 @@ static void rfcomm_tty_hangup(struct tty_struct *tty) static int rfcomm_tty_tiocmget(struct tty_struct *tty) { struct rfcomm_dev *dev = tty->driver_data; + struct rfcomm_dlc *dlc = dev->dlc; + u8 v24_sig; BT_DBG("tty %p dev %p", tty, dev); - return dev->modem_status; + rfcomm_dlc_get_modem_status(dlc, &v24_sig); + + return (v24_sig & (TIOCM_DTR | TIOCM_RTS)) | dev->modem_status; } static int rfcomm_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) @@ -1071,23 +1075,15 @@ static int rfcomm_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigne rfcomm_dlc_get_modem_status(dlc, &v24_sig); - if (set & TIOCM_DSR || set & TIOCM_DTR) + if (set & TIOCM_DTR) v24_sig |= RFCOMM_V24_RTC; - if (set & TIOCM_RTS || set & TIOCM_CTS) + if (set & TIOCM_RTS) v24_sig |= RFCOMM_V24_RTR; - if (set & TIOCM_RI) - v24_sig |= RFCOMM_V24_IC; - if (set & TIOCM_CD) - v24_sig |= RFCOMM_V24_DV; - if (clear & TIOCM_DSR || clear & TIOCM_DTR) + if (clear & TIOCM_DTR) v24_sig &= ~RFCOMM_V24_RTC; - if (clear & TIOCM_RTS || clear & TIOCM_CTS) + if (clear & TIOCM_RTS) v24_sig &= ~RFCOMM_V24_RTR; - if (clear & TIOCM_RI) - v24_sig &= ~RFCOMM_V24_IC; - if (clear & TIOCM_CD) - v24_sig &= ~RFCOMM_V24_DV; rfcomm_dlc_set_modem_status(dlc, v24_sig); -- 2.49.1

4 weeks

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[PATCH v2 1/3] KVM: arm64: Make all 32bit ID registers fully writable

by Marc Zyngier

32bit ID registers aren't getting much love these days, and are often missed in updates. One of these updates broke restoring a GICv2 guest on a GICv3 machine. Instead of performing a piecemeal fix, just bite the bullet and make all 32bit ID regs fully writable. KVM itself never relies on them for anything, and if the VMM wants to mess up the guest, so be it. Fixes: 5cb57a1aff755 ("KVM: arm64: Zero ID_AA64PFR0_EL1.GIC when no GICv3 is presented to the guest") Reported-by: Peter Maydell <peter.maydell(a)linaro.org> Signed-off-by: Marc Zyngier <maz(a)kernel.org> Cc: stable(a)vger.kernel.org --- arch/arm64/kvm/sys_regs.c | 59 ++++++++++++++++++++------------------- 1 file changed, 31 insertions(+), 28 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index e67eb39ddc118..ad82264c6cbe1 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2595,19 +2595,23 @@ static bool bad_redir_trap(struct kvm_vcpu *vcpu, .val = 0, \ } -/* sys_reg_desc initialiser for known cpufeature ID registers */ -#define AA32_ID_SANITISED(name) { \ - ID_DESC(name), \ - .visibility = aa32_id_visibility, \ - .val = 0, \ -} - /* sys_reg_desc initialiser for writable ID registers */ #define ID_WRITABLE(name, mask) { \ ID_DESC(name), \ .val = mask, \ } +/* + * 32bit ID regs are fully writable when the guest is 32bit + * capable. Nothing in the KVM code should rely on 32bit features + * anyway, only 64bit, so let the VMM do its worse. + */ +#define AA32_ID_WRITABLE(name) { \ + ID_DESC(name), \ + .visibility = aa32_id_visibility, \ + .val = GENMASK(31, 0), \ +} + /* sys_reg_desc initialiser for cpufeature ID registers that need filtering */ #define ID_FILTERED(sysreg, name, mask) { \ ID_DESC(sysreg), \ @@ -3128,40 +3132,39 @@ static const struct sys_reg_desc sys_reg_descs[] = { /* AArch64 mappings of the AArch32 ID registers */ /* CRm=1 */ - AA32_ID_SANITISED(ID_PFR0_EL1), - AA32_ID_SANITISED(ID_PFR1_EL1), + AA32_ID_WRITABLE(ID_PFR0_EL1), + AA32_ID_WRITABLE(ID_PFR1_EL1), { SYS_DESC(SYS_ID_DFR0_EL1), .access = access_id_reg, .get_user = get_id_reg, .set_user = set_id_dfr0_el1, .visibility = aa32_id_visibility, .reset = read_sanitised_id_dfr0_el1, - .val = ID_DFR0_EL1_PerfMon_MASK | - ID_DFR0_EL1_CopDbg_MASK, }, + .val = GENMASK(31, 0) }, ID_HIDDEN(ID_AFR0_EL1), - AA32_ID_SANITISED(ID_MMFR0_EL1), - AA32_ID_SANITISED(ID_MMFR1_EL1), - AA32_ID_SANITISED(ID_MMFR2_EL1), - AA32_ID_SANITISED(ID_MMFR3_EL1), + AA32_ID_WRITABLE(ID_MMFR0_EL1), + AA32_ID_WRITABLE(ID_MMFR1_EL1), + AA32_ID_WRITABLE(ID_MMFR2_EL1), + AA32_ID_WRITABLE(ID_MMFR3_EL1), /* CRm=2 */ - AA32_ID_SANITISED(ID_ISAR0_EL1), - AA32_ID_SANITISED(ID_ISAR1_EL1), - AA32_ID_SANITISED(ID_ISAR2_EL1), - AA32_ID_SANITISED(ID_ISAR3_EL1), - AA32_ID_SANITISED(ID_ISAR4_EL1), - AA32_ID_SANITISED(ID_ISAR5_EL1), - AA32_ID_SANITISED(ID_MMFR4_EL1), - AA32_ID_SANITISED(ID_ISAR6_EL1), + AA32_ID_WRITABLE(ID_ISAR0_EL1), + AA32_ID_WRITABLE(ID_ISAR1_EL1), + AA32_ID_WRITABLE(ID_ISAR2_EL1), + AA32_ID_WRITABLE(ID_ISAR3_EL1), + AA32_ID_WRITABLE(ID_ISAR4_EL1), + AA32_ID_WRITABLE(ID_ISAR5_EL1), + AA32_ID_WRITABLE(ID_MMFR4_EL1), + AA32_ID_WRITABLE(ID_ISAR6_EL1), /* CRm=3 */ - AA32_ID_SANITISED(MVFR0_EL1), - AA32_ID_SANITISED(MVFR1_EL1), - AA32_ID_SANITISED(MVFR2_EL1), + AA32_ID_WRITABLE(MVFR0_EL1), + AA32_ID_WRITABLE(MVFR1_EL1), + AA32_ID_WRITABLE(MVFR2_EL1), ID_UNALLOCATED(3,3), - AA32_ID_SANITISED(ID_PFR2_EL1), + AA32_ID_WRITABLE(ID_PFR2_EL1), ID_HIDDEN(ID_DFR1_EL1), - AA32_ID_SANITISED(ID_MMFR5_EL1), + AA32_ID_WRITABLE(ID_MMFR5_EL1), ID_UNALLOCATED(3,7), /* AArch64 ID registers */ -- 2.47.3

4 weeks

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[PATCH 5.4.y] iommu/amd: Fix 2G+ memory-size overflow in unmap_sg()

by Jinhui Guo

Since npages is declared as int, shifting npages << PAGE_SHIFT for a 2 GB+ scatter-gather list overflows before reaching __unmap_single(), leading to incorrect unmapping. A 2 GB region equals 524,288 pages. The expression npages << PAGE_SHIFT yields 0x80000000, which exceeds INT32_MAX (0x7FFFFFFF). Casting to size_t therefore produces 0xFFFFFFFF80000000, an overflow value that breaks the unmap size calculation. Fix the overflow by casting npages to size_t before the PAGE_SHIFT left-shift. Fixes: 89736a0ee81d ("Revert "iommu/amd: Remove the leftover of bypass support"") Cc: stable(a)vger.kernel.org # 5.4 Signed-off-by: Jinhui Guo <guojinhui.liam(a)bytedance.com> --- Hi, We hit an IO_PAGE_FAULT on AMD with 5.4-stable when mapping a 2 GB scatter-gather list. The fault is caused by an overflow in unmap_sg(): on stable-5.4 the SG-mmap path was never moved to the IOMMU framework, so the bug exists only in this branch. Regards, Jinhui drivers/iommu/amd_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index a30aac41af42..60872d7be52b 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2682,7 +2682,7 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist, dma_dom = to_dma_ops_domain(domain); npages = sg_num_pages(dev, sglist, nelems); - __unmap_single(dma_dom, startaddr, npages << PAGE_SHIFT, dir); + __unmap_single(dma_dom, startaddr, (size_t)npages << PAGE_SHIFT, dir); } /* -- 2.20.1

4 weeks

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[PATCH 1/3] KVM: arm64: Make ID_PFR1_EL1.GIC writable

by Marc Zyngier

Similarly to ID_AA64PFR0_EL1.GIC, relax ID_PFR1_EL1.GIC to be writable. Fixes: 5cb57a1aff755 ("KVM: arm64: Zero ID_AA64PFR0_EL1.GIC when no GICv3 is presented to the guest") Reported-by: Peter Maydell <peter.maydell(a)linaro.org> Signed-off-by: Marc Zyngier <maz(a)kernel.org> Cc: stable(a)vger.kernel.org --- arch/arm64/kvm/sys_regs.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index b29f72478a50d..73dcefe51a3e7 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2528,6 +2528,12 @@ static bool bad_redir_trap(struct kvm_vcpu *vcpu, .val = mask, \ } +#define AA32_ID_WRITABLE(name, mask) { \ + ID_DESC(name), \ + .visibility = aa32_id_visibility, \ + .val = mask, \ +} + /* sys_reg_desc initialiser for cpufeature ID registers that need filtering */ #define ID_FILTERED(sysreg, name, mask) { \ ID_DESC(sysreg), \ @@ -3040,7 +3046,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { /* AArch64 mappings of the AArch32 ID registers */ /* CRm=1 */ AA32_ID_SANITISED(ID_PFR0_EL1), - AA32_ID_SANITISED(ID_PFR1_EL1), + AA32_ID_WRITABLE(ID_PFR1_EL1, ID_PFR1_EL1_GIC), { SYS_DESC(SYS_ID_DFR0_EL1), .access = access_id_reg, .get_user = get_id_reg, -- 2.47.3

4 weeks

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[PATCH] HID: amd_sfh: Stop sensor before starting

by Mario Limonciello (AMD)

Titas reports that the accelerometer sensor on their laptop only works after a warm boot or unloading/reloading the amd-sfh kernel module. Presumably the sensor is in a bad state on cold boot and failing to start, so explicitly stop it before starting. Cc: stable(a)vger.kernel.org Fixes: 93ce5e0231d79 ("HID: amd_sfh: Implement SFH1.1 functionality") Reported-by: Titas <novatitas366(a)gmail.com> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220670 Tested-by: Titas <novatitas366(a)gmail.com> Signed-off-by: Mario Limonciello (AMD) <superm1(a)kernel.org> --- drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c index 0a9b44ce4904e..b0bab2a1ddcc5 100644 --- a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c +++ b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c @@ -194,6 +194,8 @@ static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata) if (rc) goto cleanup; + mp2_ops->stop(privdata, cl_data->sensor_idx[i]); + amd_sfh_wait_for_response(privdata, cl_data->sensor_idx[i], DISABLE_SENSOR); writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); mp2_ops->start(privdata, info); status = amd_sfh_wait_for_response -- 2.43.0

4 weeks

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[PATCH] net: core: prevent NULL deref in generic_hwtstamp_ioctl_lower()

by Jiaming Zhang

The ethtool tsconfig Netlink path can trigger a null pointer dereference. A call chain such as: tsconfig_prepare_data() -> dev_get_hwtstamp_phylib() -> vlan_hwtstamp_get() -> generic_hwtstamp_get_lower() -> generic_hwtstamp_ioctl_lower() results in generic_hwtstamp_ioctl_lower() being called with kernel_cfg->ifr as NULL. The generic_hwtstamp_ioctl_lower() function does not expect a NULL ifr and dereferences it, leading to a system crash. Fix this by adding a NULL check for kernel_cfg->ifr in generic_hwtstamp_get/set_lower(). If ifr is NULL, return -EOPNOTSUPP to prevent the call to the legacy IOCTL helper. Fixes: 6e9e2eed4f39 ("net: ethtool: Add support for tsconfig command to get/set hwtstamp config") Closes: https://lore.kernel.org/lkml/cd6a7056-fa6d-43f8-b78a-f5e811247ba8@linux.dev… Signed-off-by: Jiaming Zhang <r772577952(a)gmail.com> --- net/core/dev_ioctl.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index ad54b12d4b4c..39eaf6ba981a 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -474,6 +474,10 @@ int generic_hwtstamp_get_lower(struct net_device *dev, return err; } + /* Netlink path with unconverted driver */ + if (!kernel_cfg->ifr) + return -EOPNOTSUPP; + /* Legacy path: unconverted lower driver */ return generic_hwtstamp_ioctl_lower(dev, SIOCGHWTSTAMP, kernel_cfg); } @@ -498,6 +502,10 @@ int generic_hwtstamp_set_lower(struct net_device *dev, return err; } + /* Netlink path with unconverted driver */ + if (!kernel_cfg->ifr) + return -EOPNOTSUPP; + /* Legacy path: unconverted lower driver */ return generic_hwtstamp_ioctl_lower(dev, SIOCSHWTSTAMP, kernel_cfg); } -- 2.34.1

4 weeks

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[PATCH 2/2] drm/sched: Use proper locks for drm_sched_job_init()

by Philipp Stanner

drm_sched_job_init() is just racing when checking an entity's runqueue, without taking the proper spinlock. Add the lock. Cc: stable(a)vger.kernel.org # 6.7+ Fixes: 56e449603f0a ("drm/sched: Convert the GPU scheduler to variable number of run-queues") Signed-off-by: Philipp Stanner <phasta(a)kernel.org> --- drivers/gpu/drm/scheduler/sched_main.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 7f938f491b6f..30028054385f 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -799,7 +799,12 @@ int drm_sched_job_init(struct drm_sched_job *job, u32 credits, void *owner, uint64_t drm_client_id) { - if (!entity->rq) { + struct drm_sched_rq *rq; + + spin_lock(&entity->lock); + rq = entity->rq; + spin_unlock(&entity->lock); + if (!rq) { /* This will most likely be followed by missing frames * or worse--a blank screen--leave a trail in the * logs, so this can be debugged easier. -- 2.49.0

4 weeks

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[PATCH 1/2] drm/sched: Use proper locks in drm_sched_job_arm()

by Philipp Stanner

drm_sched_job_arm() is just racing when dereferencing entity and runqueue. Add the proper spinlocks. Cc: stable(a)vger.kernel.org # v5.16+ Fixes: dbe48d030b28 ("drm/sched: Split drm_sched_job_init") Signed-off-by: Philipp Stanner <phasta(a)kernel.org> --- drivers/gpu/drm/scheduler/sched_main.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index c39f0245e3a9..7f938f491b6f 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -859,10 +859,16 @@ void drm_sched_job_arm(struct drm_sched_job *job) BUG_ON(!entity); drm_sched_entity_select_rq(entity); + + spin_lock(&entity->lock); + spin_lock(&entity->rq->lock); sched = entity->rq->sched; + spin_unlock(&entity->rq->lock); + + job->s_priority = entity->priority; + spin_unlock(&entity->lock); job->sched = sched; - job->s_priority = entity->priority; drm_sched_fence_init(job->s_fence, job->entity); } -- 2.49.0

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