drm/xe: Fix a NULL vs IS_ERR() in xe_vm_add_compute_exec_queue()

The xe_preempt_fence_create() function returns error pointers.  It
never returns NULL.  Update the error checking to match.

Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/aJTMBdX97cof_009@stanley.mountain
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 75cc23ffe5b422bc3cbd5cf0956b8b86e4b0e162)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index dc4f61e56579cb7b83fe0c7c99d492131c47567f..5146999d27fa2d229b2099cdfba24dd8d449cb7d 100644 (file)
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -240,8 +240,8 @@ int xe_vm_add_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q)
 
        pfence = xe_preempt_fence_create(q, q->lr.context,
                                         ++q->lr.seqno);
-       if (!pfence) {
-               err = -ENOMEM;
+       if (IS_ERR(pfence)) {
+               err = PTR_ERR(pfence);
                goto out_fini;
        }