This is a note to let you know that I've just added the patch titled
vfio: platform: Do not pass return buffer to ACPI _RST method
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vfio-platform-do-not-pass-return-buffer-to-acpi-_rst.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 48a7272a32af23b2b931f7dba1c9f08716242368
Author: Rafael Mendonca <rafaelmendsr@xxxxxxxxx>
Date: Tue Oct 18 12:28:25 2022 -0300
vfio: platform: Do not pass return buffer to ACPI _RST method
[ Upstream commit e67e070632a665c932d534b8b800477bb3111449 ]
The ACPI _RST method has no return value, there's no need to pass a return
buffer to acpi_evaluate_object().
Fixes: d30daa33ec1d ("vfio: platform: call _RST method when using ACPI")
Signed-off-by: Rafael Mendonca <rafaelmendsr@xxxxxxxxx>
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221018152825.891032-1-rafaelmendsr@xxxxxxxxx
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index c29fc6844f84..d8bb6537c688 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -78,12 +78,11 @@ static int vfio_platform_acpi_call_reset(struct vfio_platform_device *vdev,
const char **extra_dbg)
{
#ifdef CONFIG_ACPI
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct device *dev = vdev->device;
acpi_handle handle = ACPI_HANDLE(dev);
acpi_status acpi_ret;
- acpi_ret = acpi_evaluate_object(handle, "_RST", NULL, &buffer);
+ acpi_ret = acpi_evaluate_object(handle, "_RST", NULL, NULL);
if (ACPI_FAILURE(acpi_ret)) {
if (extra_dbg)
*extra_dbg = acpi_format_exception(acpi_ret);
