drm/xe/migrate: fix copy direction in access_memory

After we do the modification on the host side, ensure we write the
result back to VRAM and not the other way around, otherwise the
modification will be lost if treated like a read.

Fixes: 270172f64b11 ("drm/xe: Update xe_ttm_access_memory to use GPU for non-visible access")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250710134128.800756-2-matthew.auld@intel.com
(cherry picked from commit c12fe703cab93f9d8bfe0ff32b58e7b1fd52be1f)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c
index 66bc02302c553ac59cfdf1914df4a8d085822bb7..73286b815f395b4fc8f23b7bc28fa7156efbda97 100644 (file)
--- a/drivers/gpu/drm/xe/xe_migrate.c
+++ b/drivers/gpu/drm/xe/xe_migrate.c
@@ -1848,7 +1848,7 @@ int xe_migrate_access_memory(struct xe_migrate *m, struct xe_bo *bo,
                                err = xe_migrate_access_memory(m, bo,
                                                               offset & ~XE_CACHELINE_MASK,
                                                               (void *)ptr,
-                                                              sizeof(bounce), 0);
+                                                              sizeof(bounce), write);
                                if (err)
                                        return err;
                        } else {