This is a note to let you know that I've just added the patch titled
drm/amd/amdgpu: skip ucode loading if ucode_size == 0
to the 5.15-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:
drm-amd-amdgpu-skip-ucode-loading-if-ucode_size-0.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6268650639d527df69c9fe33cd5b6e25ad0a7199
Author: Chengming Gui <Jack.Gui@xxxxxxx>
Date: Tue Aug 30 16:33:01 2022 +0800
drm/amd/amdgpu: skip ucode loading if ucode_size == 0
[ Upstream commit 39c84b8e929dbd4f63be7e04bf1a2bcd92b44177 ]
Restrict the ucode loading check to avoid frontdoor loading error.
Signed-off-by: Chengming Gui <Jack.Gui@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 5b41c29f3ed50..65744c3bd3648 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -2505,7 +2505,7 @@ static int psp_load_smu_fw(struct psp_context *psp)
static bool fw_load_skip_check(struct psp_context *psp,
struct amdgpu_firmware_info *ucode)
{
- if (!ucode->fw)
+ if (!ucode->fw || !ucode->ucode_size)
return true;
if (ucode->ucode_id == AMDGPU_UCODE_ID_SMC &&
