WARNING: 'happend' may be misspelled - perhaps 'happened'?
#8: 
free it when error happend in the sub-function.

CHECK: Alignment should match open parenthesis
#33: FILE: sound/soc/soc-dapm.c:942:
+		w->kcontrols = kcalloc(w->num_kcontrols,
+					sizeof(struct snd_kcontrol *),

CHECK: Alignment should match open parenthesis
#79: FILE: sound/soc/soc-dapm.c:1011:
+	w->kcontrols = kcalloc(w->num_kcontrols,
+				sizeof(struct snd_kcontrol *),

WARNING: braces {} are not necessary for single statement blocks
#81: FILE: sound/soc/soc-dapm.c:1013:
+	if (!w->kcontrols) {
+		return -ENOMEM;
+	}

CHECK: Alignment should match open parenthesis
#118: FILE: sound/soc/soc-dapm.c:1047:
+		w->kcontrols = kcalloc(w->num_kcontrols,
+					sizeof(struct snd_kcontrol *),

WARNING: braces {} are not necessary for single statement blocks
#120: FILE: sound/soc/soc-dapm.c:1049:
+		if (!w->kcontrols) {
+			return -ENOMEM;
+		}

CHECK: Alignment should match open parenthesis
#148: FILE: sound/soc/soc-dapm.c:1083:
+		w->kcontrols = kcalloc(w->num_kcontrols,
+					sizeof(struct snd_kcontrol *),

total: 0 errors, 3 warnings, 4 checks, 201 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

./linux-sof-driver/0001-ASoC-topology-bug-fix-oops-cause-by-pointer-derefere.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.