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drm/xe: Make LRC W/A scratch buffer usage consistent

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The LRC W/A currently checks for LRC being iomem in some places, while
in others it checks if the scratch buffer is non-NULL. This
inconsistency causes issues with the VF post-migration recovery code,
which blindly passes in a scratch buffer.

This patch standardizes the check by consistently verifying whether the
LRC is iomem to determine if the scratch buffer should be used.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Tomasz Lis <tomasz.lis@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20251008214532.3442967-8-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2025-10-08 14:45:05 -07:00
parent 807c42dd80
commit 0ca229da92
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/xe/xe_lrc.c
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@@ -1247,7 +1247,7 @@ fail:
static void finish_bo(struct bo_setup_state *state)
{
if (!state->buffer)
if (!state->lrc->bo->vmap.is_iomem)
return;
xe_map_memcpy_to(gt_to_xe(state->lrc->gt), &state->lrc->bo->vmap,