Hello, I wrote:
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
We're getting "ide0: unexpected interrupt, status=0x58, count=1" with
palm_bk3710 driver when running hdparm with option -X. That interrupt
has beenidentidied to occur while ide_driveid_update() waits for non-BSY
status polling the alt. status reg. After looking at the code there, I
couldn't help wondering why I never saw that before with any other
controller since the code looked like it was bound to produce the
unexpected interrupts -- unless I'm missing something?..
Ah, I know why: unexpected_intr() just is never called for PCI chips.
Here's an related excerpt from ide_intr():
#ifdef CONFIG_BLK_DEV_IDEPCI
if (hwif->chipset != ide_pci)
#endif /* CONFIG_BLK_DEV_IDEPCI */
{
/*
* Probably not a shared PCI interrupt,
* so we can safely try to do something about it:
*/
unexpected_intr(irq, hwgroup);
#ifdef CONFIG_BLK_DEV_IDEPCI
} else {
/*
* Whack the status register, just in case
* we have a leftover pending IRQ.
*/
(void) hwif->INB(hwif->io_ports.status_addr);
#endif /* CONFIG_BLK_DEV_IDEPCI */
MBR, Sergei
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