From: Kalle Valo <kvalo@codeaurora.org>
To: Nathan Chancellor <natechancellor@gmail.com>
Cc: Ping-Ke Shih <pkshih@realtek.com>,
Larry Finger <Larry.Finger@lwfinger.net>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
Nathan Chancellor <natechancellor@gmail.com>
Subject: Re: [PATCH] rtlwifi: Remove unnecessary NULL check in rtl_regd_init
Date: Thu, 24 Oct 2019 05:47:35 +0000 (UTC) [thread overview]
Message-ID: <20191024054735.190CA60E74@smtp.codeaurora.org> (raw)
In-Reply-To: <20191023004703.39710-1-natechancellor@gmail.com>
Nathan Chancellor <natechancellor@gmail.com> wrote:
> When building with Clang + -Wtautological-pointer-compare:
>
> drivers/net/wireless/realtek/rtlwifi/regd.c:389:33: warning: comparison
> of address of 'rtlpriv->regd' equal to a null pointer is always false
> [-Wtautological-pointer-compare]
> if (wiphy == NULL || &rtlpriv->regd == NULL)
> ~~~~~~~~~^~~~ ~~~~
> 1 warning generated.
>
> The address of an array member is never NULL unless it is the first
> struct member so remove the unnecessary check. This was addressed in
> the staging version of the driver in commit f986978b32b3 ("Staging:
> rtlwifi: remove unnecessary NULL check").
>
> While we are here, fix the following checkpatch warning:
>
> CHECK: Comparison to NULL could be written "!wiphy"
> 35: FILE: drivers/net/wireless/realtek/rtlwifi/regd.c:389:
> + if (wiphy == NULL)
>
> Fixes: 0c8173385e54 ("rtl8192ce: Add new driver")
> Link:https://github.com/ClangBuiltLinux/linux/issues/750
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Patch applied to wireless-drivers-next.git, thanks.
091c6e9c083f rtlwifi: Remove unnecessary NULL check in rtl_regd_init
--
https://patchwork.kernel.org/patch/11205577/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
prev parent reply other threads:[~2019-10-24 5:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-23 0:47 [PATCH] rtlwifi: Remove unnecessary NULL check in rtl_regd_init Nathan Chancellor
2019-10-23 5:38 ` Pkshih
2019-10-24 5:47 ` Kalle Valo [this message]
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