kernel/linux.git/drivers/platform/x86/dell, branch linux-7.1.y

platform/x86: dell/dell-rbtn: Check ACPI_COMPANION() against NULL

2026-05-20T10:05:06+00:00

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 dell-rbtn driver. Fixes: 19ebacfb442b ("platform/x86: dell/dell-rbtn: Convert ACPI driver to a platform one") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/2276487.irdbgypaU6@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/wmi: Replace .no_notify_data with .min_event_size

2026-04-13T11:11:27+00:00

WMI drivers using the buffer-based WMI API are expected to reject undersized event payloads. Extend the WMI driver core to allow such drivers to specify their minimum supported event payload size. Also remove the now redundant .no_notify_data field. Signed-off-by: Armin Wolf Link: https://patch.msgid.link/20260406203237.2970-7-W_Armin@gmx.de Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

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

2026-04-09T12:41:26+00:00

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

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

2026-04-09T11:56:33+00:00

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

platform/x86: dell-wmi-sysman: Fix typo in function comment

2026-04-07T14:26:36+00:00

s/Fress/Frees/ Signed-off-by: Thorsten Blum Link: https://patch.msgid.link/20260401094318.658932-2-thorsten.blum@linux.dev Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: dell-wmi-sysman: Clean up security buffer helpers

2026-04-07T14:22:42+00:00

In calculate_security_buffer(), call strlen() once and use ALIGN() to round up to an even size. In populate_security_buffer(), also avoid recomputing strlen(), rename the u32 pointer from 'seclen' to 'seclenp' to avoid confusion with the new length variable, and drop the memcpy() guard since calling it with size 0 is a no-op and therefore safe. Use 'const char *' for the read-only source string in both helpers. Signed-off-by: Thorsten Blum Link: https://patch.msgid.link/20260331160310.608857-3-thorsten.blum@linux.dev Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

Merge tag 'fixes' into 'for-next'

2026-03-31T14:24:54+00:00

Allows uniwill-laptop feature work that depends on changes in the fixes branch proceed.

platform/x86: dell/dell-rbtn: Convert ACPI driver to a platform one

2026-03-23T09:53:33+00:00

In all cases in which a struct acpi_driver is used for binding a driver to an ACPI device object, a corresponding platform device is created by the ACPI core and that device is regarded as a proper representation of underlying hardware. Accordingly, a struct platform_driver should be used by driver code to bind to that device. There are multiple reasons why drivers should not bind directly to ACPI device objects [1]. Overall, it is better to bind drivers to platform devices than to their ACPI companions, so convert the Dell Airplane Mode Switch (rbtn) ACPI driver to a platform one. After this change, the subordinate rfkill device will be registered under the platform device used for driver binding instead of its ACPI companion. While this is not expected to alter functionality, it changes sysfs layout and so it will be visible to user space. Link: https://lore.kernel.org/all/2396510.ElGaqSPkdT@rafael.j.wysocki/ [1] Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/6141354.MhkbZ0Pkbq@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: dell/dell-rbtn: Register ACPI notify handler directly

2026-03-23T09:53:30+00:00

To facilitate subsequent conversion of the driver to a platform one, make it install an ACPI notify handler directly instead of using a .notify() callback in struct acpi_driver. No intentional functional impact. Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/9591832.CDJkKcVGEf@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: dell-wmi-sysman: Use sysfs_emit{_at} in show functions

2026-03-09T14:15:14+00:00

Replace sprintf() with sysfs_emit() and sysfs_emit_at() in sysfs show functions. sysfs_emit() and sysfs_emit_at() are preferred for formatting sysfs output because they provide safer bounds checking. In reset_bios_show(), use sysfs_emit_at() to avoid manual buffer size accounting. Signed-off-by: Thorsten Blum Link: https://patch.msgid.link/20260305140912.258090-2-thorsten.blum@linux.dev Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen