diff --git a/drivers/crypto/hisilicon/debugfs.c b/drivers/crypto/hisilicon/debugfs.c
index 13bec8b2d723..a1d41ee39816 100644
--- a/drivers/crypto/hisilicon/debugfs.c
+++ b/drivers/crypto/hisilicon/debugfs.c
@@ -744,8 +744,14 @@ static void dfx_regs_uninit(struct hisi_qm *qm,
 {
 	int i;
 
+	if (!dregs)
+		return;
+
 	/* Setting the pointer is NULL to prevent double free */
 	for (i = 0; i < reg_len; i++) {
+		if (!dregs[i].regs)
+			continue;
+
 		kfree(dregs[i].regs);
 		dregs[i].regs = NULL;
 	}
@@ -795,14 +801,21 @@ alloc_error:
 static int qm_diff_regs_init(struct hisi_qm *qm,
 		struct dfx_diff_registers *dregs, u32 reg_len)
 {
+	int ret;
+
 	qm->debug.qm_diff_regs = dfx_regs_init(qm, qm_diff_regs, ARRAY_SIZE(qm_diff_regs));
-	if (IS_ERR(qm->debug.qm_diff_regs))
-		return PTR_ERR(qm->debug.qm_diff_regs);
+	if (IS_ERR(qm->debug.qm_diff_regs)) {
+		ret = PTR_ERR(qm->debug.qm_diff_regs);
+		qm->debug.qm_diff_regs = NULL;
+		return ret;
+	}
 
 	qm->debug.acc_diff_regs = dfx_regs_init(qm, dregs, reg_len);
 	if (IS_ERR(qm->debug.acc_diff_regs)) {
 		dfx_regs_uninit(qm, qm->debug.qm_diff_regs, ARRAY_SIZE(qm_diff_regs));
-		return PTR_ERR(qm->debug.acc_diff_regs);
+		ret = PTR_ERR(qm->debug.acc_diff_regs);
+		qm->debug.acc_diff_regs = NULL;
+		return ret;
 	}
 
 	return 0;
@@ -843,7 +856,9 @@ static int qm_last_regs_init(struct hisi_qm *qm)
 static void qm_diff_regs_uninit(struct hisi_qm *qm, u32 reg_len)
 {
 	dfx_regs_uninit(qm, qm->debug.acc_diff_regs, reg_len);
+	qm->debug.acc_diff_regs = NULL;
 	dfx_regs_uninit(qm, qm->debug.qm_diff_regs, ARRAY_SIZE(qm_diff_regs));
+	qm->debug.qm_diff_regs = NULL;
 }
 
 /**