linux-kernel - Re: [BUG] wbsd.c: after spin_lock_bh uses spin_unlock instead spin_unlock

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Date:	Thu, 08 Oct 2009 20:20:25 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alexander Strakh <strakh@...ras.ru>
Cc:	Pierre Ossman <pierre@...man.eu>, sdhci-devel@...ts.ossman.eu,
	Linux Kernlel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] wbsd.c: after spin_lock_bh uses spin_unlock instead
 spin_unlock_bh

On Thu, 2009-10-08 at 15:18 +0000, Alexander Strakh wrote:
> 	KERNEL_VERSION: 2.6.31
> 	DESCRIBE:
> Driver ./drivers/mmc/host/wbsd.c calls spin_lock_bh and then spin_unlock 
> instead of spin_unlock_bh:
> 
>  753 static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
> ....
>  761         spin_lock_bh(&host->lock);
> ....
>  844 done:
>  845         wbsd_request_end(host, mrq);
>  846
>  847         spin_unlock_bh(&host->lock);
>  848 }
> 
> But in wsdb_request calls spin_unlock/spin_lock instead of 
> spin_unlock_bh/spin_lock_bh;
> 
>  206 static void wbsd_request_end(struct wbsd_host *host, struct mmc_request 
> ....
>  230         spin_unlock(&host->lock);
>  231         mmc_request_done(host->mmc, mrq);
>  232         spin_lock(&host->lock);
>  233 }

Doesn't look too odd, it simply leaves BH disabled, but unlocks the
spinlock.
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