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Commit 4f94a929 authored by Steve Glendinning's avatar Steve Glendinning Committed by David S. Miller
Browse files

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: default avatarSteve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7749622d

drivers/net/usb/smsc75xx.c

+1 −3
Original line number Diff line number Diff line
@@ -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);