linux-kernel - Re: [PATCH] HID: hidraw: fix nonblock read return EAGAIN after device removed

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Message-ID: <20121126081512.GD21091@core.coreip.homeip.net>
Date:	Mon, 26 Nov 2012 00:15:12 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	"founder.fang" <founder.fang@...il.com>
Cc:	jkosina@...e.cz, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: hidraw: fix nonblock read return EAGAIN after
 device removed

Hi Founder,

On Mon, Nov 26, 2012 at 10:30:37AM +0800, founder.fang wrote:
> Hi Linux-Input, Jiri, Dmitry,
> this patch is related to nonblock read on hidraw device.
> when nonblock read the condition check (file->f_flags & O_NONBLOCK)
> always be true,
> signal_pending and device exist checking never get a chance to run, so
> the user mode code always
> get EAGAIN even if device removed. move nonblock mode checking to the
> last can fix this problem.
> 
> Signed-off-by: Founder Fang <founder.fang@...il.com>
> 

Reviewed-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Makes sense to me. However it looks like your mailer line-wrapped the
patch, please resend so Jiri can apply it.

Thanks.

-- 
Dmitry
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