From: Kalle Valo <kvalo@codeaurora.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Luca Coelho <luciano.coelho@intel.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Johannes Berg <johannes.berg@intel.com>,
Arnd Bergmann <arnd@arndb.de>, kernel test robot <lkp@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: [PATCH] [v2] iwlwifi: pcie: fix constant-conversion warning
Date: Mon, 22 Nov 2021 18:30:10 +0000 (UTC) [thread overview]
Message-ID: <163760580216.5904.8642934154284226912.kvalo@codeaurora.org> (raw)
In-Reply-To: <20211111073145.2504032-1-arnd@kernel.org>
Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> clang points out a potential issue with integer overflow when
> the iwl_dev_info_table[] array is empty:
>
> 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>
> Acked-by: Luca Coelho <luciano.coelho@intel.com>
Dropping v2 and taking v3 instead.
Patch set to Changes Requested.
--
https://patchwork.kernel.org/project/linux-wireless/patch/20211111073145.2504032-1-arnd@kernel.org/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
prev parent reply other threads:[~2021-11-22 18:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 7:31 Arnd Bergmann
2021-11-12 9:17 ` Coelho, Luciano
2021-11-18 12:28 ` Arnd Bergmann
2021-11-22 18:30 ` Kalle Valo [this message]
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