On 07/01/26 18:24, Rafael J. Wysocki wrote:
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On Wed, Jan 7, 2026 at 1:03 PM Kartik Rajput kkartik@nvidia.com wrote:
When a device is matched via PRP0001, the driver's OF (DT) match table must be used to obtain the device match data. If a driver provides both an acpi_match_table and an of_match_table, the current acpi_device_get_match_data() path consults the driver's acpi_match_table and returns NULL (no ACPI ID matches).
Explicitly detect PRP0001 and fetch match data from the driver's of_match_table via acpi_of_device_get_match_data().
Fixes: 886ca88be6b3 ("ACPI / bus: Respect PRP0001 when retrieving device match data") Cc: stable@vger.kernel.org Signed-off-by: Kartik Rajput kkartik@nvidia.com
Changes in v2: * Fix build errors.
drivers/acpi/bus.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 5e110badac7b..6658c4339656 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -1031,8 +1031,9 @@ const void *acpi_device_get_match_data(const struct device *dev) { const struct acpi_device_id *acpi_ids = dev->driver->acpi_match_table; const struct acpi_device_id *match;
struct acpi_device *adev = ACPI_COMPANION(dev);
if (!acpi_ids)You still need to check acpi_ids against NULL or (better) check adev against NULL.
Hi Rafael,
Thanks for reviewing the patch.
Yes, it looks like adev should be NULL-checked. acpi_of_device_get_match_data() also uses the adev reference and passes it to acpi_of_match_device(), which checks it against NULL.
I will make this change in the next revision.
Thanks, Kartik