From: Nathan Chancellor <natechancellor@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: John Whitmore <johnfwhitmore@gmail.com>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
clang-built-linux@googlegroups.com,
Nick Desaulniers <ndesaulniers@google.com>,
Nathan Chancellor <natechancellor@gmail.com>
Subject: [PATCH] staging: rtl8192u: Remove an unnecessary NULL check
Date: Tue, 21 May 2019 10:42:21 -0700 [thread overview]
Message-ID: <20190521174221.124459-1-natechancellor@gmail.com> (raw)
Clang warns:
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:2663:47: warning:
address of array 'param->u.wpa_ie.data' will always evaluate to 'true'
[-Wpointer-bool-conversion]
(param->u.wpa_ie.len && !param->u.wpa_ie.data))
~~~~~~~~~~~~~~~~~^~~~
This was exposed by commit deabe03523a7 ("Staging: rtl8192u: ieee80211:
Use !x in place of NULL comparisons") because we disable the warning
that would have pointed out the comparison against NULL is also false:
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:2663:46: warning:
comparison of array 'param->u.wpa_ie.data' equal to a null pointer is
always false [-Wtautological-pointer-compare]
(param->u.wpa_ie.len && param->u.wpa_ie.data == NULL))
~~~~~~~~~~~~~~~~^~~~ ~~~~
Remove it so clang no longer warns.
Link: https://github.com/ClangBuiltLinux/linux/issues/487
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
index f38f9d8b78bb..e0da0900a4f7 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
@@ -2659,8 +2659,7 @@ static int ieee80211_wpa_set_wpa_ie(struct ieee80211_device *ieee,
{
u8 *buf;
- if (param->u.wpa_ie.len > MAX_WPA_IE_LEN ||
- (param->u.wpa_ie.len && !param->u.wpa_ie.data))
+ if (param->u.wpa_ie.len > MAX_WPA_IE_LEN)
return -EINVAL;
if (param->u.wpa_ie.len) {
--
2.22.0.rc1
next reply other threads:[~2019-05-21 17:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-21 17:42 Nathan Chancellor [this message]
2019-05-21 22:53 ` [PATCH] staging: rtl8192u: Remove an unnecessary NULL check Nick Desaulniers
2019-05-21 22:57 ` Nick Desaulniers
2019-05-22 9:24 ` Dan Carpenter
2019-05-22 7:04 ` Dan Carpenter
2019-05-22 20:39 ` Nathan Chancellor
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