From: Rusty Russell <rusty@rustcorp.com.au>
To: linux-kernel@vger.kernel.org
Cc: Heinz Graalfs <graalfs@linux.vnet.ibm.com>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: [PATCH 1/6] virtio_net: don't crash if virtqueue is broken.
Date: Wed, 15 Jan 2014 13:06:06 +1030 [thread overview]
Message-ID: <1389753371-26469-1-git-send-email-rusty@rustcorp.com.au> (raw)
A bad implementation of virtio might cause us to mark the virtqueue
broken: we'll dev_err() in that case, and the device is useless, but
let's not BUG_ON().
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
drivers/net/virtio_net.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 5d776447d9c3..0949688ae540 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -904,8 +904,7 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
sgs[out_num + in_num++] = &stat;
BUG_ON(out_num + in_num > ARRAY_SIZE(sgs));
- BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, in_num, vi, GFP_ATOMIC)
- < 0);
+ virtqueue_add_sgs(vi->cvq, sgs, out_num, in_num, vi, GFP_ATOMIC);
if (unlikely(!virtqueue_kick(vi->cvq)))
return status == VIRTIO_NET_OK;
--
1.8.3.2
next reply other threads:[~2014-01-15 2:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 2:36 Rusty Russell [this message]
2014-01-15 2:36 ` [PATCH 2/6] virtio_blk: don't crash, report error if virtqueue is broken Rusty Russell
2014-01-30 9:09 ` Heinz Graalfs
2014-01-31 5:00 ` Rusty Russell
2014-01-15 2:36 ` [PATCH 3/6] virtio_balloon: don't crash " Rusty Russell
2014-01-15 2:36 ` [PATCH 4/6] virtio-rng: " Rusty Russell
2014-01-15 2:36 ` [PATCH 5/6] virtio: fail adding buffer on broken queues Rusty Russell
2014-01-15 2:36 ` [PATCH 6/6] virtio: virtio_break_device() to mark all virtqueues broken Rusty Russell
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