drm/xe: Check return value of GGTT workqueue allocation

commit ce29214ada6d08dbde1eeb5a69c3b09ddf3da146 upstream.

Workqueue allocation can fail, so check the return value of the GGTT
workqueue allocation and fail driver initialization if the allocation
fails.

Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://lore.kernel.org/r/20251022005538.828980-2-matthew.brost@intel.com
(cherry picked from commit 1f1314e8e71385bae319e43082b798c11f6648bc)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/xe/xe_ggtt.c b/drivers/gpu/drm/xe/xe_ggtt.c
index 29d4d3f51da17b7020348104565645792325de2d..8f7b2603e47f226ab52a5d9a5ef93638e14c3d6c 100644 (file)
--- a/drivers/gpu/drm/xe/xe_ggtt.c
+++ b/drivers/gpu/drm/xe/xe_ggtt.c
@@ -291,6 +291,9 @@ int xe_ggtt_init_early(struct xe_ggtt *ggtt)
                ggtt->pt_ops = &xelp_pt_ops;
 
        ggtt->wq = alloc_workqueue("xe-ggtt-wq", 0, WQ_MEM_RECLAIM);
+       if (!ggtt->wq)
+               return -ENOMEM;
+
        __xe_ggtt_init_early(ggtt, xe_wopcm_size(xe));
 
        err = drmm_add_action_or_reset(&xe->drm, ggtt_fini_early, ggtt);