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ide: fix OOPS during ide-cd error recovery

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On Tuesday 19 May 2009 20:29:28 Martin Lottermoser wrote:

>   hdc: cdrom_decode_status: error=0x40 <3>{ LastFailedSense=0x04 }
>   ide: failed opcode was: unknown
>   hdc: DMA disabled
>   ------------[ cut here ]------------
>   kernel BUG at drivers/ide/ide-io.c:872!

It is possible for ide-cd to ignore ide_error()'s return value under
some circumstances.  Workaround it in ide_intr() and ide_timer_expiry()
by checking if there is a device/port reset pending currently.

Fixes bug #13345:

	http://bugzilla.kernel.org/show_bug.cgi?id=13345

Reported-by: Martin Lottermoser <Martin.Lottermoser@t-online.de>
Reported-and-tested-by: Modestas Vainius <modestas@vainius.eu>
Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-05-22 16:23:37 +02:00
parent 8369d5fa63
commit e3b29f0512
1 changed files with 2 additions and 2 deletions
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4
drivers/ide/ide-io.c
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@ -696,7 +696,7 @@ void ide_timer_expiry (unsigned long data)
}
spin_lock_irq(&hwif->lock);
enable_irq(hwif->irq);
if (startstop == ide_stopped) {
if (startstop == ide_stopped && hwif->polling == 0) {
ide_unlock_port(hwif);
plug_device = 1;
}
@ -868,7 +868,7 @@ irqreturn_t ide_intr (int irq, void *dev_id)
* same irq as is currently being serviced here, and Linux
* won't allow another of the same (on any CPU) until we return.
*/
if (startstop == ide_stopped) {
if (startstop == ide_stopped && hwif->polling == 0) {
BUG_ON(hwif->handler);
ide_unlock_port(hwif);
plug_device = 1;