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authorSteve Glendinning <steve.glendinning@shawell.net>2012-11-08 06:26:21 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-09 16:59:32 -0500
commit9532021da6da48351ce48a079c673df8e3930b4a (patch)
tree13c3514760ea7c0c8dce8ce17257fc889239a5db
parent60713a0ca7fd6651b951cc1b4dbd528d1fc0281b (diff)
downloadlinux-9532021da6da48351ce48a079c673df8e3930b4a.tar.bz2
usbnet: ratelimit kevent may have been dropped warnings
when something goes wrong, a flood of these messages can be generated by usbnet (thousands per second). This doesn't generally *help* the condition so this patch ratelimits the rate of their generation. There's an underlying problem in usbnet's kevent deferral mechanism which needs fixing, specifically that events *can* get dropped and not handled. This patch doesn't address this, but just mitigates fallout caused by the current implemention. Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/usb/usbnet.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index cb04f900cc46..edb81ed06950 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -359,10 +359,12 @@ static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb,
void usbnet_defer_kevent (struct usbnet *dev, int work)
{
set_bit (work, &dev->flags);
- if (!schedule_work (&dev->kevent))
- netdev_err(dev->net, "kevent %d may have been dropped\n", work);
- else
+ if (!schedule_work (&dev->kevent)) {
+ if (net_ratelimit())
+ netdev_err(dev->net, "kevent %d may have been dropped\n", work);
+ } else {
netdev_dbg(dev->net, "kevent %d scheduled\n", work);
+ }
}
EXPORT_SYMBOL_GPL(usbnet_defer_kevent);