[PATCH] drm/xe/migrate: fix copy direction in access_memory

[Matthew Brost]

On Thu, Jul 10, 2025 at 02:41:29PM +0100, Matthew Auld wrote:
> 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 at intel.com>
> Cc: Matthew Brost <matthew.brost at intel.com>

Reviewed-by: Matthew Brost <matthew.brost at intel.com>

> ---
>  drivers/gpu/drm/xe/xe_migrate.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c
> index 4e2bdf70eb70..2adf95d35c31 100644
> --- 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 {
> -- 
> 2.50.0
>