From: Rusty Russell <rusty@rustcorp•com.au>
To: netdev@vger•kernel.org
Cc: "Michael S. Tsirkin" <mst@redhat•com>
Subject: [PATCH] virtio_net: avoid BUG_ON() with large packets when CONFIG_DEBUG_SG=y
Date: Tue, 30 Mar 2010 15:26:35 +1030 [thread overview]
Message-ID: <201003301526.35720.rusty@rustcorp.com.au> (raw)
AFAICT only weird kvm setups and lguest traverse this code path now.
Signed-off-by: Rusty Russell <rusty@rustcorp•com.au>
---
drivers/net/virtio_net.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -351,6 +351,9 @@ static int add_recvbuf_big(struct virtne
char *p;
int i, err, offset;
+ /* This is a waste of cycles, but satisfies CONFIG_DEBUG_SG. */
+ sg_init_table(sg, ARRAY_SIZE(sg));
+
/* page in sg[MAX_SKB_FRAGS + 1] is list tail */
for (i = MAX_SKB_FRAGS + 1; i > 1; --i) {
first = get_a_page(vi, gfp);
next reply other threads:[~2010-03-30 4:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-30 4:56 Rusty Russell [this message]
2010-03-30 5:08 ` [PATCH] virtio_net: avoid BUG_ON() with large packets when CONFIG_DEBUG_SG=y David Miller
2010-03-31 0:35 ` Rusty Russell
2010-03-31 5:39 ` Shirley Ma
2010-03-31 9:17 ` Michael S. Tsirkin
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