diff options
| author | Bjørn Mork <bjorn@mork.no> | 2013-01-31 12:36:05 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-04 22:07:31 +0400 |
| commit | bf414b369f158bb527f9f29174ada815f961b44c (patch) | |
| tree | 96349391731e44d9ba6fb2b6d4bea70d03277230 /drivers | |
| parent | 5f1e942cb45d06968b0ce94472d97014e0e1fdc9 (diff) | |
| download | linux-bf414b369f158bb527f9f29174ada815f961b44c.tar.xz | |
net: usbnet: fix tx_dropped statistics
It is normal for minidrivers accumulating frames to return NULL
from their tx_fixup function. We do not want to count this as a
drop, or log any debug messages. A different exit path is
therefore chosen for such drivers, skipping the debug message
and the tx_dropped increment.
The test for accumulating drivers was however completely bogus,
making the exit path selection depend on whether the user had
enabled tx_err logging or not. This would arbitrarily mess up
accounting for both accumulating and non-accumulating minidrivers,
and would result in unwanted debug messages for the accumulating
drivers.
Fix by testing for FLAG_MULTI_PACKET instead, which probably was
the intention from the beginning. This usage match the documented
behaviour of this flag:
Indicates to usbnet, that USB driver accumulates multiple IP packets.
Affects statistic (counters) and short packet handling.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/usb/usbnet.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 977837725726..5e33606c1366 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1125,13 +1125,11 @@ netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, if (info->tx_fixup) { skb = info->tx_fixup (dev, skb, GFP_ATOMIC); if (!skb) { - if (netif_msg_tx_err(dev)) { - netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); - goto drop; - } else { - /* cdc_ncm collected packet; waits for more */ + /* packet collected; minidriver waiting for more */ + if (info->flags & FLAG_MULTI_PACKET) goto not_drop; - } + netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); + goto drop; } } length = skb->len; |