kernel/linux.git/drivers/platform, branch v6.6.143

platform/x86/intel/vsec: Fix enable_cnt imbalance on PCIe error recovery

2026-06-19T11:39:38+00:00

[ Upstream commit 348ccc754d8939e21ca5956ff45720b81d6e407f ] After a PCIe Uncorrectable Error has been reported by a device with Intel Vendor Specific Extended Capabilities and has been recovered through a Secondary Bus Reset, its driver calls intel_vsec_pci_probe() to rescan and reinitialize VSECs. intel_vsec_pci_probe() invokes pcim_enable_device() and thereby adds another devm action which calls pcim_disable_device() on driver unbind. So once the driver unbinds, pcim_disable_device() will be called as many times as an Uncorrectable Error occurred, plus one. This will lead to an enable_cnt imbalance on driver unbind. Additionally, since commit dc957ab6aa05 ("platform/x86/intel/vsec: Add private data for per-device data"), a devm_kzalloc() allocation is leaked on every Uncorrectable Error. Avoid by splitting the VSEC rescan out of intel_vsec_pci_probe() into a separate helper and calling that on PCIe error recovery. Fixes: 936874b77dd0 ("platform/x86/intel/vsec: Add PCI error recovery support to Intel PMT") Signed-off-by: Lukas Wunner Cc: stable@vger.kernel.org # v6.0+ Link: https://patch.msgid.link/bd594d09fa866dc51dddc9a447c3b23f9b1402cc.1778736835.git.lukas@wunner.de Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

platform/x86: intel-vbtn: Check ACPI_HANDLE() against NULL

2026-06-01T15:43:14+00:00

[ Upstream commit a9f305c5a355efeb240d406d378491d9eec02d07 ] Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add a requisite ACPI_HANDLE() check against NULL to the platform/x86 intel-vbtn driver. Fixes: 26173179fae1 ("platform/x86: intel-vbtn: Eval VBDL after registering our notifier") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/3426431.aeNJFYEL58@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: intel-hid: Check ACPI_HANDLE() against NULL

2026-06-01T15:43:14+00:00

[ Upstream commit 5c69e090ae5dd93d910f70db0796357080707d26 ] Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add a requisite ACPI_HANDLE() check against NULL to the platform/x86 intel-hid driver. Fixes: ecc83e52b28c ("intel-hid: new hid event driver for hotkeys") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/1971512.tdWV9SEqCh@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: hp_accel: Check ACPI_COMPANION() against NULL

2026-06-01T15:43:14+00:00

[ Upstream commit abfbe5ee8ae89f1f5449790423d5dd3e423545bd ] Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add a requisite ACPI_COMPANION() check against NULL to the platform/x86 hp_accel driver. Fixes: 8ebcb6c94c71 ("platform/x86: hp_accel: Convert to be a platform driver") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/2425918.ElGaqSPkdT@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: adv_swbutton: Check ACPI_HANDLE() against NULL

2026-06-01T15:43:14+00:00

[ Upstream commit e7a9a6ea40e352cd7977f6a8c80bdeadf65ad838 ] Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add a requisite ACPI_HANDLE() check against NULL to the platform/x86 adv_swbutton driver. Fixes: 3d904005f686 ("platform/x86: add support for Advantech software defined button") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/5115425.31r3eYUQgx@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: dell-wmi-sysman: bound enumeration string aggregation

2026-05-23T11:03:21+00:00

[ Upstream commit 3c34471c26abc52a37f5ad90949e2e4b8027eb14 ] populate_enum_data() aggregates firmware-provided value-modifier and possible-value strings into fixed 512-byte struct members. The current code bounds each individual source string but then appends every string and separator with raw strcat() and no remaining-space check. Switch the aggregation loops to a bounded append helper and reject enumeration packages whose combined strings do not fit in the destination buffers. Fixes: e8a60aa7404b ("platform/x86: Introduce support for Systems Management Driver over WMI for Dell Systems") Signed-off-by: Pengpeng Hou Link: https://patch.msgid.link/20260408084501.1-dell-wmi-sysman-v2-pengpeng@iscas.ac.cn [ij: add include] Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: dell_rbu: avoid uninit value usage in packet_size_write()

2026-05-23T11:03:21+00:00

[ Upstream commit f8fd138c2363c0e2d3235c32bfb4fb5c6474e4ae ] Ensure the temp value has been properly parsed from the user-provided buffer and initialized to be used in later operations. While at it, prefer a convenient kstrtoul() helper. Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool. Fixes: ad6ce87e5bd4 ("[PATCH] dell_rbu: changes in packet update mechanism") Signed-off-by: Fedor Pchelkin Link: https://patch.msgid.link/20260403134240.604837-1-pchelkin@ispras.ru [ij: add include] Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: panasonic-laptop: Fix OPTD notifier registration and cleanup

2026-05-23T11:03:20+00:00

[ Upstream commit 8baeff2c1d33dad8572216c6ad3a7425852507d4 ] An ACPI notify handler is leaked if device_create_file() returns an error in acpi_pcc_hotkey_add(). Also, it is pointless to call pcc_unregister_optd_notifier() in acpi_pcc_hotkey_remove() if pcc->platform is NULL and it is better to arrange the cleanup code in that function in the same order as the rollback code in acpi_pcc_hotkey_add(). Address the above by placing the pcc_register_optd_notifier() call in acpi_pcc_hotkey_add() after the device_create_file() return value check and placing the pcc_unregister_optd_notifier() call in acpi_pcc_hotkey_remove() right before the device_remove_file() call. Fixes: d5a81d8e864b ("platform/x86: panasonic-laptop: Add support for optical driver power in Y and W series") Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/2411055.ElGaqSPkdT@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/surface: surfacepro3_button: Drop wakeup source on remove

2026-05-23T11:03:20+00:00

[ Upstream commit 1410a228ab2d36fe2b383415a632ae12048d4f3a ] The wakeup source added by device_init_wakeup() in surface_button_add() needs to be dropped during driver removal, so update the driver to do that. Fixes: 19351f340765 ("platform/x86: surfacepro3: Support for wakeup from suspend-to-idle") Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/4368848.1IzOArtZ34@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/chrome: chromeos_tbmc: Drop wakeup source on remove

2026-05-23T11:03:10+00:00

[ Upstream commit 5d441a4bc93642ed6f41da87327a39946b4e1455 ] The wakeup source added by device_init_wakeup() in chromeos_tbmc_add() needs to be dropped during driver removal, so add a .remove() callback to the driver for this purpose. Fixes: 0144c00ed86b ("platform/chrome: chromeos_tbmc: Report wake events") Signed-off-by: Rafael J. Wysocki Link: https://lore.kernel.org/r/6151957.MhkbZ0Pkbq@rafael.j.wysocki Signed-off-by: Tzung-Bi Shih Signed-off-by: Sasha Levin