linux-kernel - Re: mwifiex: fix racing condition when downloading firmware

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Message-Id: <20160614142519.AB5F2613E0@smtp.codeaurora.org>
Date:	Tue, 14 Jun 2016 14:25:19 +0000 (UTC)
From:	Kalle Valo <kvalo@...eaurora.org>
To:	Wei-Ning Huang <wnhuang@...omium.org>
Cc:	Linux-Wireless <linux-wireless@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, akarwar@...vell.com,
	djkurtz@...omium.org, Wei-Ning Huang <wnhuang@...omium.org>
Subject: Re: mwifiex: fix racing condition when downloading firmware

Wei-Ning Huang <wnhuang@...omium.org> wrote:
> The action 'check for winner' and 'download firmware' should be an
> atomic action. This is true for btmrvl driver but not mwmfiex, which
> cause firmware download to fail when the following senerio happens:
> 
> 1) mwifiex check winner status: true
> 2) btmrvl check winner status: true, and start downloading firmware
> 3) mwfieix tries to download firmware, but failed because btmrvl is
> already downloading.
> 
> This won't happen if 1) and 3) is an atomic action. This patch adds
> sdio_claim/release_host call around those two actions to make sure it's
> atomic.
> 
> Signed-off-by: Wei-Ning Huang <wnhuang@...omium.org>

Thanks, 1 patch applied to wireless-drivers-next.git:

65c71efe1c59 mwifiex: fix racing condition when downloading firmware

-- 
Sent by pwcli
https://patchwork.kernel.org/patch/9123771/