linux-kernel - [PATCH] staging: rtl8723bs: Clean up tests if NULL returned on failure

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Message-ID: <20200325222908.GA5370@simran-Inspiron-5558>
Date:   Thu, 26 Mar 2020 03:59:08 +0530
From:   Simran Singhal <singhalsimran0@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        outreachy-kernel <outreachy-kernel@...glegroups.com>
Subject: [PATCH] staging: rtl8723bs: Clean up tests if NULL returned on
 failure

Some functions like kmalloc/kzalloc return NULL on failure.
When NULL represents failure, !x is commonly used.

This was done using Coccinelle:
@@
expression *e;
identifier l1;
@@

e = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\)(...);
...
- e == NULL
+ !e

Signed-off-by: Simran Singhal <singhalsimran0@...il.com>
---
 drivers/staging/rtl8723bs/os_dep/ioctl_linux.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
index 29f36cca3972..5c27c11f006a 100644
--- a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
+++ b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
@@ -474,7 +474,7 @@ static int wpa_set_encryption(struct net_device *dev, struct ieee_param *param,
 			wep_key_len = wep_key_len <= 5 ? 5 : 13;
 			wep_total_len = wep_key_len + FIELD_OFFSET(struct ndis_802_11_wep, KeyMaterial);
 			pwep = kzalloc(wep_total_len, GFP_KERNEL);
-			if (pwep == NULL) {
+			if (!pwep) {
 				RT_TRACE(_module_rtl871x_ioctl_os_c, _drv_err_, (" wpa_set_encryption: pwep allocate fail !!!\n"));
 				goto exit;
 			}
@@ -2137,7 +2137,7 @@ static int rtw_wx_set_enc_ext(struct net_device *dev,
 
 	param_len = sizeof(struct ieee_param) + pext->key_len;
 	param = kzalloc(param_len, GFP_KERNEL);
-	if (param == NULL)
+	if (!param)
 		return -1;
 
 	param->cmd = IEEE_CMD_SET_ENCRYPTION;
@@ -3491,7 +3491,7 @@ static int rtw_set_encryption(struct net_device *dev, struct ieee_param *param,
 			wep_key_len = wep_key_len <= 5 ? 5 : 13;
 			wep_total_len = wep_key_len + FIELD_OFFSET(struct ndis_802_11_wep, KeyMaterial);
 			pwep = kzalloc(wep_total_len, GFP_KERNEL);
-			if (pwep == NULL) {
+			if (!pwep) {
 				DBG_871X(" r871x_set_encryption: pwep allocate fail !!!\n");
 				goto exit;
 			}
-- 
2.17.1