netdev - [PATCH kernel 2.6.35-rc3] smc91c92_cs: fix the problem that lan & modem does not work simultaneously

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Date:	Sun, 20 Jun 2010 10:24:27 +0900
From:	Ken Kawasaki <ken_kawasaki@...ing.nifty.jp>
To:	netdev@...r.kernel.org
Subject: [PATCH  kernel 2.6.35-rc3] smc91c92_cs: fix the problem that lan &
 modem does not work simultaneously


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@...ing.nifty.jp>

--

--- linux-2.6.35-rc3/drivers/net/pcmcia/smc91c92_cs.c.orig	2010-06-19 09:42:59.000000000 +0900
+++ linux-2.6.35-rc3/drivers/net/pcmcia/smc91c92_cs.c	2010-06-19 11:25:34.000000000 +0900
@@ -1505,12 +1505,20 @@ irq_done:
 	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);
 }
--
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