[PATCH 6.6 220/301] drm/amdgpu: Fix comparison in amdgpu_res_cpu_visible

Greg Kroah-Hartman
2024-05-14T11:20:46Z

From: Michel Dänzer <mdaenzer@redhat.com>

commit 8d2c930735f850e5be6860aeb39b27ac73ca192f upstream.

It incorrectly claimed a resource isn't CPU visible if it's located at
the very end of CPU visible VRAM.

Fixes: a6ff969fe9cb ("drm/amdgpu: fix visible VRAM handling during faults")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3343
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reported-and-Tested-by: Jeremy Day <jsday@noreason.ca>
Signed-off-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -432,7 +432,7 @@ bool amdgpu_res_cpu_visible(struct amdgp

amdgpu_res_first(res, 0, res->size, &cursor);
while (cursor.remaining) {
- if ((cursor.start + cursor.size) >= adev->gmc.visible_vram_size)
+ if ((cursor.start + cursor.size) > adev->gmc.visible_vram_size)
return false;
amdgpu_res_next(&cursor, cursor.size);
}