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r6040: restore MIER register correctly when IRQ line is shared

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When the r6040 device IRQ line is shared we will enter the driver
interrupt service routine, mask off the device interrupt enable
register (MIER) and return with IRQ_NONE, we would then leave the
device with interrupts disabled, this patch fixes that issue.

Reported-by: Steve Holland <sdh4@iastate.edu>
Signed-off-by: Joe Chou <joe.chou@rdc.com.tw>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2009-07-08 03:05:14 +00:00 committed by David S. Miller
parent 345aa03120
commit 35976d4d55
1 changed files with 4 additions and 1 deletions
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5
drivers/net/r6040.c
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@ -704,8 +704,11 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id)
/* Read MISR status and clear */
status = ioread16(ioaddr + MISR);
if (status == 0x0000 || status == 0xffff)
if (status == 0x0000 || status == 0xffff) {
/* Restore RDC MAC interrupt */
iowrite16(misr, ioaddr + MIER);
return IRQ_NONE;
}
/* RX interrupt request */
if (status & RX_INTS) {