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On Wed, Mar 27, 2002 at 02:19:20PM -0800, Tad Hunt wrote:
> 
> I just had one of our hardware engineers change the PCMCIA interface
> on our MPC8260 board so I can demultiplex the pcmcia interrupts
> from the other interrupts on the same irq line (aren't PALs great!).
> Anyway, the problem described in PR kern/15841 still exists when
> using the flash ATA PC Card.
> 
> As before the jammed interrupt problem never occurs with the IBM
> Microdrive (side note: believe it or not, the microdrive is faster
> for both reading and writing than the flash disk!).
> 
> In summary, the problem is that the flash disk is asserting the
> interrupt request, but the WDCF_IRQ_WAIT bit is not set in the
> "channel_softc", so the interrupt is never serviced.
> 
> I see the same problem on the "stock" NetBSD-1.5 i386 port (a Dell
> with a cardbus card in a PCI slot) as I do on our MPC8260 port,
> which leads me to believe that it is a general problem.
> 
> I see the same behavior with both of the following flash disk parts
> (the only ones I have been able to test with so far):
> 
> 1) SMART Modular Technologies ATA PC Card (model SM9FLAPC512M1)
> 
>    NetBSD identifies this as follows:
> 
> 	wdc0 at pcmcia0 function 0 port 0x15000000-0x1500000f
> 	wd0 at wdc0 channel 0 drive 0: <SMART ATA FLASH>
> 	wd0: drive supports 1-sector PIO transfers, LBA addressing
> 	wd0: 489 MB, 994 cyl, 16 head, 63 sec, 512 bytes/sect x 1001952 sectors
> 	wd0: drive supports PIO mode 4
> 
> 2) AVL Compact Flash Card 128MB (unknown model number)
> 
>    NetBSD identifies this as follows:
> 
> 	wdc0 at pcmcia0 function 0 port 0x15000000-0x1500000f
> 	wd0 at wdc0 channel 0 drive 0: <Ritek Corporation>
> 	wd0: drive supports 1-sector PIO transfers, LBA addressing
> 	wd0: 122 MB, 978 cyl, 8 head, 32 sec, 512 bytes/sect x 250368 sectors

Hi,
I just commited the attached patch to current. Does it solve your problem ?

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
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Index: wdc.c
===================================================================
RCS file: /cvsroot/syssrc/sys/dev/ic/wdc.c,v
retrieving revision 1.112
diff -u -r1.112 wdc.c
--- wdc.c	2002/03/08 20:48:38	1.112
+++ wdc.c	2002/03/28 22:46:40
@@ -714,6 +714,8 @@
 	}
 	if ((chp->ch_flags & WDCF_IRQ_WAIT) == 0) {
 		WDCDEBUG_PRINT(("wdcintr: inactive controller\n"), DEBUG_INTR);
+		/* try to clear the pending interrupt anyway */
+		(void)bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status);
 		return (0);
 	}
 

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