From 7930f8e5892fa683a1aaf2ba83d8aedc588b409e Mon Sep 17 00:00:00 2001
From: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Date: Sun, 16 Jun 2019 08:44:09 +0530
Subject: [PATCH] staging: rtl8723bs: hal: Add null check after memory
 allocation

Add NULL check post call to rtw_zmalloc.

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/rtl8723bs/hal/sdio_ops.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/rtl8723bs/hal/sdio_ops.c b/drivers/staging/rtl8723bs/hal/sdio_ops.c
index 0b8e4e671bd7..399dbb4c934f 100644
--- a/drivers/staging/rtl8723bs/hal/sdio_ops.c
+++ b/drivers/staging/rtl8723bs/hal/sdio_ops.c
@@ -816,6 +816,9 @@ void clearinterrupt8723bsdio(struct adapter *adapter)
 	haldata = GET_HAL_DATA(adapter);
 	clear = rtw_zmalloc(4);
 
+	if (!clear)
+		return;
+
 	/*  Clear corresponding HISR Content if needed */
 	*(__le32 *)clear = cpu_to_le32(haldata->sdio_hisr & MASK_SDIO_HISR_CLEAR);
 	if (*(__le32 *)clear) {