linux-kernel - [patch 039/176] staging: hv: fix netvsc sleeping while atomic

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Date:	Tue, 15 Feb 2011 16:20:07 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Hank Janssen <hjanssen@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Timo TerÃ€s <timo.teras@....fi>
Subject: [patch 039/176] staging: hv: fix netvsc sleeping while atomic

2.6.36-stable review patch.  If anyone has any objections, please let us know.

------------------

From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@....fi>

commit d70c673153d42e8aefd5ac296c8159ef222d076b upstream.

The channel callbacks are called directly from vmbus_event_dpc
which runs in tasklet context. These callbacks need to use
GFP_ATOMIC.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16701

Cc: Hank Janssen <hjanssen@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: Timo Teräs <timo.teras@....fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/staging/hv/netvsc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/hv/netvsc.c
+++ b/drivers/staging/hv/netvsc.c
@@ -1250,7 +1250,7 @@ static void NetVscOnChannelCallback(void
 	/* ASSERT(device); */
 
 	packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
-			 GFP_KERNEL);
+			 GFP_ATOMIC);
 	if (!packet)
 		return;
 	buffer = packet;


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