From: Jeff Garzik <jeff@garzik.org>
To: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>, linux-ide@vger.kernel.org
Subject: Re: [PATCH 3/15] qd65xx: fix deadlock on error handling
Date: Wed, 03 Oct 2007 18:51:17 -0400 [thread overview]
Message-ID: <47041CE5.90407@garzik.org> (raw)
In-Reply-To: <200710040041.40047.bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz wrote:
> On Wednesday 03 October 2007, Jeff Garzik wrote:
>> Bartlomiej Zolnierkiewicz wrote:
>>
>> ACK everything else (that I snipped)...
>>
>>> @@ -303,6 +281,7 @@ static void qd6580_set_pio_mode(ide_driv
>>>
>>> static int __init qd_testreg(int port)
>>> {
>>> + static DEFINE_SPINLOCK(qd65xx_lock);
>>> unsigned long flags;
>>> u8 savereg, readreg;
>> At this point, the lock is largely pointless, isn't it?
>>
>> Seems like you might as well use local_irq_save/restore.
>
> Yeah.
>
>
> [PATCH] qd65xx: remove pointless qd_{read,write}_reg() (take 2)
>
> These functions are atomic so locking is pointless (noticed by Sergei).
>
> v2:
> We can now just use local_irq_save/restore() in qd_testreg() (noticed by Jeff).
>
> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
> Cc: Jeff Garzik <jeff@garzik.org>
> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
ACK
prev parent reply other threads:[~2007-10-03 22:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-01 21:33 [PATCH 3/15] qd65xx: fix deadlock on error handling Bartlomiej Zolnierkiewicz
2007-10-02 12:59 ` Sergei Shtylyov
2007-10-02 13:04 ` Jeff Garzik
2007-10-02 22:15 ` Bartlomiej Zolnierkiewicz
2007-10-02 22:19 ` Jeff Garzik
2007-10-03 22:41 ` Bartlomiej Zolnierkiewicz
2007-10-03 22:51 ` Jeff Garzik [this message]
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