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authorSteve Glendinning <steve.glendinning@shawell.net>2012-05-04 00:57:12 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-07 23:43:56 -0400
commit4f94a929e4adb0d0ed78d448ff68fe870163c575 (patch)
treee9c1afc53b91b8e27fad9d5c570f3256da194ce6 /drivers/net/usb/smsc75xx.c
parent7749622d7fc958ecfbec67bc76c9e0d861a872d8 (diff)
smsc75xx: eliminate unnecessary phy register read
Only a write is necessary to clear the interrupt status, and we don't use the value from the preceding read operation. This patch eliminates the unnecessary read. Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/smsc75xx.c')
-rw-r--r--drivers/net/usb/smsc75xx.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index ecab87b85728..72b62b51c46f 100644
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -508,9 +508,7 @@ static int smsc75xx_link_reset(struct usbnet *dev)
u16 lcladv, rmtadv;
int ret;
- /* read and write to clear phy interrupt status */
- ret = smsc75xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
- check_warn_return(ret, "Error reading PHY_INT_SRC");
+ /* write to clear phy interrupt status */
smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
PHY_INT_SRC_CLEAR_ALL);