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smc91c92_cs: fix the problem that lan & modem does not work simultaneously

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smc91c92_cs:
  Fix the problem that lan & modem does not work simultaneously
  in the Megahertz multi-function card.
  We need to write MEGAHERTZ_ISR to retrigger interrupt.

Signed-off-by: Ken Kawasaki <ken_kawasaki@spring.nifty.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ken Kawasaki 2010-06-19 15:24:27 +00:00 committed by David S. Miller
parent 9f888160bd
commit 9735b7ef00
1 changed files with 13 additions and 5 deletions
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18
drivers/net/pcmcia/smc91c92_cs.c
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@ -1505,12 +1505,20 @@ static irqreturn_t smc_interrupt(int irq, void *dev_id)
writeb(cor & ~COR_IREQ_ENA, smc->base + MOT_LAN + CISREG_COR);
writeb(cor, smc->base + MOT_LAN + CISREG_COR);
}
#ifdef DOES_NOT_WORK
if (smc->base != NULL) { /* Megahertz MFC's */
readb(smc->base+MEGAHERTZ_ISR);
readb(smc->base+MEGAHERTZ_ISR);
if ((smc->base != NULL) && /* Megahertz MFC's */
(smc->manfid == MANFID_MEGAHERTZ) &&
(smc->cardid == PRODID_MEGAHERTZ_EM3288)) {
u_char tmp;
tmp = readb(smc->base+MEGAHERTZ_ISR);
tmp = readb(smc->base+MEGAHERTZ_ISR);
/* Retrigger interrupt if needed */
writeb(tmp, smc->base + MEGAHERTZ_ISR);
writeb(tmp, smc->base + MEGAHERTZ_ISR);
}
#endif
spin_unlock(&smc->lock);
return IRQ_RETVAL(handled);
}