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smsc911x: leave RX_STOP interrupt permanently enabled 

smsc911x_set_multicast_list currently performs the only non-atomic
read-modify-write of INT_EN.  This patch permanently enables the
RXSTOP_INT interrupt, and changes the ISR to only conditionally run the
multicast filter workaround code.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Glendinning 2009-01-26 21:33:16 -08:00 committed by David S. Miller
parent a528079e01
commit 1373c0fdbc
1 changed files with 3 additions and 10 deletions
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11
drivers/net/smsc911x.c
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@ -1247,7 +1247,7 @@ static int smsc911x_open(struct net_device *dev)
napi_enable(&pdata->napi);
temp = smsc911x_reg_read(pdata, INT_EN);
temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_);
temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
smsc911x_reg_write(pdata, INT_EN, temp);
spin_lock_irq(&pdata->mac_lock);
@ -1419,11 +1419,6 @@ static void smsc911x_set_multicast_list(struct net_device *dev)
/* Request the hardware to stop, then perform the
* update when we get an RX_STOP interrupt */
smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
temp = smsc911x_reg_read(pdata, INT_EN);
temp |= INT_EN_RXSTOP_INT_EN_;
smsc911x_reg_write(pdata, INT_EN, temp);
temp = smsc911x_mac_read(pdata, MAC_CR);
temp &= ~(MAC_CR_RXEN_);
smsc911x_mac_write(pdata, MAC_CR, temp);
@ -1462,10 +1457,8 @@ static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
/* Called when there is a multicast update scheduled and
* it is now safe to complete the update */
SMSC_TRACE(INTR, "RX Stop interrupt");
temp = smsc911x_reg_read(pdata, INT_EN);
temp &= (~INT_EN_RXSTOP_INT_EN_);
smsc911x_reg_write(pdata, INT_EN, temp);
smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
if (pdata->multicast_update_pending)
smsc911x_rx_multicast_update_workaround(pdata);
serviced = IRQ_HANDLED;
}