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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Wei Yongjun <weiyj.lk@gmail.com>
Cc: gregkh@linuxfoundation.org, wonkang@gctsemi.com, joe@perches.com,
	devel@driverdev.osuosl.org, yongjun_wei@trendmicro.com.cn,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH -next] staging: gdm724x: use GFP_ATOMIC under spin lock
Date: Fri, 26 Jul 2013 10:32:33 +0300	[thread overview]
Message-ID: <20130726073233.GD5585@mwanda> (raw)
In-Reply-To: <CAPgLHd-WN2VF7vEjUn0uLd_RQYYF1qvUy1TUz4EmyPbi=8JQ4g@mail.gmail.com>

On Fri, Jul 26, 2013 at 10:15:55AM +0800, Wei Yongjun wrote:
> From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
> 
> A spin lock is taken here so we should use GFP_ATOMIC.
> 

Acked-by: Dan Carpenter <dan.carpenter@oracle.com>

But the locking here is really odd and pointless.  usb_submit_urb()
returns asynchronously before the data has been sent, so there is
almost no point in locking around it.

regards,
dan carpenter


  reply	other threads:[~2013-07-26  7:33 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-26  2:15 [PATCH -next] staging: gdm724x: use GFP_ATOMIC under spin lock Wei Yongjun
2013-07-26  7:32 ` Dan Carpenter [this message]
2013-07-26 22:04   ` Greg KH

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