linux-kernel - Re: [PATCH] usb/kaweth: use GFP_ATOMIC under spin_lock in usb_start_wait

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Message-ID: <1421066230.12454.24.camel@linux-0dmf.site>
Date:	Mon, 12 Jan 2015 13:37:10 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Alexey Khoroshilov <khoroshilov@...ras.ru>
Cc:	"David S. Miller" <davem@...emloft.net>, linux-usb@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	ldv-project@...uxtesting.org
Subject: Re: [PATCH] usb/kaweth: use GFP_ATOMIC under spin_lock in
 usb_start_wait_urb()

On Sat, 2015-01-10 at 02:16 +0300, Alexey Khoroshilov wrote:
> Commit e4c7f259c5be ("USB: kaweth.c: use GFP_ATOMIC under spin_lock")
> makes sure that kaweth_internal_control_msg() allocates memory with
> GFP_ATOMIC,
> but kaweth_internal_control_msg() also calls usb_start_wait_urb()
> that still allocates memory with GFP_NOIO.
> 
> The patch fixes usb_start_wait_urb() as well.
> 
> Found by Linux Driver Verification project (linuxtesting.org).
> 
> Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>

Acked-by: Oliver Neukum <oliver@...kum.org>

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