drm/xe/ufence: ufence can be signaled right after wait_woken

commit 4e8b5a1 upstream.

do_comapre() can return success after a timedout wait_woken() which was
treated as -ETIME. The loop calling wait_woken() sets correct err so
there is no need to re-evaluate err.

v2: Remove entire check that reevaluate err at the end(Matt)

Fixes: e670f0b ("drm/xe/uapi: Return correct error code for xe_wait_user_fence_ioctl")
Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1630
Cc: [email protected] # v6.8+
Cc: Bommu Krishnaiah <[email protected]>
Cc: Matthew Auld <[email protected]>
Cc: Matthew Brost <[email protected]>
Reviewed-by: Matthew Brost <[email protected]>
Reviewed-by: Matthew Auld <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Nirmoy Das <[email protected]>
(cherry picked from commit ec7e6a1d527755fc3c7a3303eaa5577aac5cf6be)
Signed-off-by: Lucas De Marchi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/gpu/drm/xe/xe_wait_user_fence.c

@@ -169,9 +169,6 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 			args->timeout = 0;
 	}
 
-	if (!timeout && !(err < 0))
-		err = -ETIME;
-
 	if (q)
 		xe_exec_queue_put(q);