drm/amdgpu: Fix comparison in amdgpu_res_cpu_visible

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>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 8d5413ffad301e807083d91cace4705ca4690fd9..12525a7e127e97392cd843e61a4c3f5a700fbabd 100644 (file)
--- 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 amdgpu_device *adev,
 
        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);
        }