diff options
| author | hayeswang | 2014-03-07 04:04:35 +0100 |
|---|---|---|
| committer | David S. Miller | 2014-03-07 22:24:28 +0100 |
| commit | 21949ab7df0d78b575c87c2e70192b487fd37511 (patch) | |
| tree | a95a435d248a14744f584ec4491b5866676d8bff /drivers/net/usb/r8152.c | |
| parent | r8152: replace spin_lock_irqsave and spin_unlock_irqrestore (diff) | |
| download | kernel-qcow2-linux-21949ab7df0d78b575c87c2e70192b487fd37511.tar.gz kernel-qcow2-linux-21949ab7df0d78b575c87c2e70192b487fd37511.tar.xz kernel-qcow2-linux-21949ab7df0d78b575c87c2e70192b487fd37511.zip | |
r8152: check tx agg list before spin lock
Check tx agg list before spin lock to avoid doing spin lock every
times.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/r8152.c')
| -rw-r--r-- | drivers/net/usb/r8152.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 8ecb41b2df09..00b3192568fe 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -1266,6 +1266,9 @@ static struct tx_agg *r8152_get_tx_agg(struct r8152 *tp) struct tx_agg *agg = NULL; unsigned long flags; + if (list_empty(&tp->tx_free)) + return NULL; + spin_lock_irqsave(&tp->tx_lock, flags); if (!list_empty(&tp->tx_free)) { struct list_head *cursor; |