linux-kernel - Re: [PATCH] IDE: Fix HDIO_DRIVE

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Message-ID: <87wskgtwwm.fsf@denkblock.local>
Date:	Mon, 23 Jun 2008 09:47:53 +0200
From:	Elias Oltmanns <eo@...ensachen.de>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Randy Dunlap <randy.dunlap@...cle.com>
Subject: Re: [PATCH] IDE: Fix HDIO_DRIVE_RESET handling

Elias Oltmanns <eo@...ensachen.de> wrote:
[...]
> @@ -941,6 +949,7 @@ static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
>  	/* done polling */
>  	hwgroup->polling = 0;
>  	hwgroup->resetting = 0;

Actually, ->resetting needs to be protected by the ide_lock here.

[...]
> @@ -1005,6 +1014,8 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
>  	}
>  	hwgroup->polling = 0;	/* done polling */
>  	hwgroup->resetting = 0; /* done reset attempt */

Same as above.  Unless I have missed something, a simple

spin_lock(&ide_lock)

should suffice since there cannot possibly be another interrupt that
changes ->resetting behind our back.  I'll send an updated version of
patches 1 and 4 once I have your opinion on the current series.

Regards,

Elias
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