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From: Kalle Valo <kvalo@codeaurora.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Luca Coelho <luciano.coelho@intel.com>,
	Arnd Bergmann <arnd@arndb.de>, kernel test robot <lkp@intel.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Johannes Berg <johannes.berg@intel.com>,
	Yaara Baruch <yaara.baruch@intel.com>,
	Matti Gottlieb <matti.gottlieb@intel.com>,
	Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: Re: [v3] iwlwifi: pcie: fix constant-conversion warning
Date: Mon, 22 Nov 2021 18:35:37 +0000 (UTC)	[thread overview]
Message-ID: <163760612835.7371.9754662728498548410.kvalo@codeaurora.org> (raw)
In-Reply-To: <20211118142124.526901-1-arnd@kernel.org>

Arnd Bergmann <arnd@kernel.org> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
> 
> Both gcc-11 and clang point out a potential issue with integer overflow when
> the iwl_dev_info_table[] array is empty. This is what clang warns:
> 
> drivers/net/wireless/intel/iwlwifi/pcie/drv.c:1344:42: error: implicit conversion from 'unsigned long' to 'int' changes value from 18446744073709551615 to -1 [-Werror,-Wconstant-conversion]
>         for (i = ARRAY_SIZE(iwl_dev_info_table) - 1; i >= 0; i--) {
>                ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
> 
> This is still harmless, as the loop correctly terminates, but adding
> an extra range check makes that obvious to both readers and to the
> compiler.
> 
> Fixes: 3f7320428fa4 ("iwlwifi: pcie: simplify iwl_pci_find_dev_info()")
> Reported-by: kernel test robot <lkp@intel.com>
> Cc: Nick Desaulniers <ndesaulniers@google.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Reviewed-by: Nathan Chancellor <nathan@kernel.org>

Patch applied to wireless-drivers.git, thanks.

fe785f56ad58 iwlwifi: pcie: fix constant-conversion warning

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211118142124.526901-1-arnd@kernel.org/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


      parent reply	other threads:[~2021-11-22 18:35 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-18 14:21 [PATCH] " Arnd Bergmann
2021-11-18 16:03 ` Nathan Chancellor
2021-11-18 16:27   ` Arnd Bergmann
2021-11-22 18:35 ` Kalle Valo [this message]

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