netdev - Re: [PATCH 4/14 v3] iwlegacy: Check the return value of pcie_capability_read

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Date:   Wed, 15 Jul 2020 16:47:52 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     "Saheed O. Bolarinwa" <refactormyself@...il.com>
Cc:     skhan@...uxfoundation.org, linux-pci@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org, Stanislaw Gruszka <stf_xl@...pl>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        Bolarinwa Olayemi Saheed <refactormyself@...il.com>
Subject: Re: [PATCH 4/14 v3] iwlegacy: Check the return value of
 pcie_capability_read_*()

"Saheed O. Bolarinwa" <refactormyself@...il.com> wrote:

> From: Bolarinwa Olayemi Saheed <refactormyself@...il.com>
> 
> On failure pcie_capability_read_dword() sets it's last parameter, val
> to 0. However, with Patch 14/14, it is possible that val is set to ~0 on
> failure. This would introduce a bug because (x & x) == (~0 & x).
> 
> This bug can be avoided without changing the function's behaviour if the
> return value of pcie_capability_read_dword is checked to confirm success.
> 
> Check the return value of pcie_capability_read_dword() to ensure success.
> 
> Suggested-by: Bjorn Helgaas <bjorn@...gaas.com>
> Signed-off-by: Bolarinwa Olayemi Saheed <refactormyself@...il.com>

Patch applied to wireless-drivers-next.git, thanks.

9018fd7f2a73 iwlegacy: Check the return value of pcie_capability_read_*()

-- 
https://patchwork.kernel.org/patch/11660739/

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