drm/i915: Use might_alloc()

This maybe uses lockdep through the fs_reclaim annotations.
Signed-off-by: Bernard Zhao <bernard@vivo.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210429021327.57944-1-bernard@vivo.com

drivers/gpu/drm/i915/i915_request.c

@@ -929,7 +929,7 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp)
 	u32 seqno;
 	int ret;
 
-	might_sleep_if(gfpflags_allow_blocking(gfp));
+	might_alloc(gfp);
 
 	/* Check that the caller provided an already pinned context */
 	__intel_context_pin(ce);