Messages in this thread Patch in this message | | | Date | Fri, 7 Apr 2006 19:27:14 +0530 | From | Rachita Kothiyal <> | Subject | [RFC] Patch to fix cdrom being confused on using kdump |
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Hi Jens
As we had discussed earlier, I had seen the cdrom drive appearing confused on using kdump on certain x86_64 systems. During the booting up of the second kernel, the following message would keep flooding the console, and the booting would not proceed any further.
hda: cdrom_pc_intr: The drive appears confused (ireason = 0x01)
In this patch, whenever we are hitting a confused state in the interrupt handler with the DRQ set, we clear the DSC bit of the status register and return 'ide_stopped' from the interrupt handler.
Please provide your comments and feedback.
Thanks Rachita
Signed-off-by: Rachita Kothiyal <rachita@in.ibm.com> ---
drivers/ide/ide-cd.c | 5 +++++ 1 files changed, 5 insertions(+)
diff -puN drivers/ide/ide-cd.c~cdrom-confused-clrinterrupt drivers/ide/ide-cd.c --- linux-2.6.16-mm2/drivers/ide/ide-cd.c~cdrom-confused-clrinterrupt 2006-03-29 11:23:18.000000000 +0530 +++ linux-2.6.16-mm2-rachita/drivers/ide/ide-cd.c 2006-04-07 19:05:48.962710872 +0530 @@ -1450,6 +1450,11 @@ static ide_startstop_t cdrom_pc_intr (id rq->sense_len += thislen; } else { confused: + if (( stat & DRQ_STAT) == DRQ_STAT) { + /* DRQ is set. Interrupt not welcome now. Ignore */ + HWIF(drive)->OUTB((stat & 0xEF), IDE_STATUS_REG); + return ide_stopped; + } printk (KERN_ERR "%s: cdrom_pc_intr: The drive " "appears confused (ireason = 0x%02x)\n", drive->name, ireason); _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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