staging: hv: fix netvsc sleeping while atomic

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@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/netvsc.c b/drivers/staging/hv/netvsc.c
index df9cd13..0edbe74 100644 (file)
--- a/drivers/staging/hv/netvsc.c
+++ b/drivers/staging/hv/netvsc.c
@@ -1279,7 +1279,7 @@ static void netvsc_channel_cb(void *context)
        /* ASSERT(device); */
 
        packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
-                        GFP_KERNEL);
+                        GFP_ATOMIC);
        if (!packet)
                return;
        buffer = packet;