drm/i915/gt: Pass the -EINVAL when emit_pte doesn't update any PTE

When emit_pte doesn't update any PTE with return value as 0, interpret
it as -EINVAL.

v2:
  Add missing goto [Thomas]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220405150840.29351-5-ramalingam.c@intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index e0f1c72..6378d44 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -577,7 +577,11 @@ intel_context_migrate_copy(struct intel_context *ce,
 
                len = emit_pte(rq, &it_src, src_cache_level, src_is_lmem,
                               src_offset, CHUNK_SZ);
-               if (len <= 0) {
+               if (!len) {
+                       err = -EINVAL;
+                       goto out_rq;
+               }
+               if (len < 0) {
                        err = len;
                        goto out_rq;
                }