From: Michael S. Tsirkin <mst@redhat.com>
Date: Thu, 24 Jun 2010 14:10:25 +0000 (+0300)
Subject: vhost: avoid pr_err on condition guest can trigger
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=95c0ec6a97ae82d39a6e13fc01aa76861a4a76d0;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

vhost: avoid pr_err on condition guest can trigger

Guest can trigger packet truncation by posting
a very short buffer and disabling buffer merging.
Convert pr_err to pr_debug to avoid log from filling
up when this happens.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 2764e0fbf29b..2f6185c845e0 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -177,8 +177,8 @@ static void handle_tx(struct vhost_net *net)
 			break;
 		}
 		if (err != len)
-			pr_err("Truncated TX packet: "
-			       " len %d != %zd\n", err, len);
+			pr_debug("Truncated TX packet: "
+				 " len %d != %zd\n", err, len);
 		vhost_add_used_and_signal(&net->dev, vq, head, 0);
 		total_len += len;
 		if (unlikely(total_len >= VHOST_NET_WEIGHT)) {
@@ -275,8 +275,8 @@ static void handle_rx(struct vhost_net *net)
 		}
 		/* TODO: Should check and handle checksum. */
 		if (err > len) {
-			pr_err("Discarded truncated rx packet: "
-			       " len %d > %zd\n", err, len);
+			pr_debug("Discarded truncated rx packet: "
+				 " len %d > %zd\n", err, len);
 			vhost_discard_vq_desc(vq);
 			continue;
 		}