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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2006-12-10 02:20:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-10 09:57:20 -0800 |
| commit | ee2f344b33b507af23610c8fdfdde38d7c10fb33 (patch) | |
| tree | 7908a16d267168a74178aad61e30a82590ca6aac /drivers/ide/ide-cd.c | |
| parent | 33859f7f9788da2ac9aa23be4dc8e948112809ca (diff) | |
| download | op-kernel-dev-ee2f344b33b507af23610c8fdfdde38d7c10fb33.zip op-kernel-dev-ee2f344b33b507af23610c8fdfdde38d7c10fb33.tar.gz | |
[PATCH] ide-cd: Handle strange interrupt on the Intel ESB2
The ESB2 appears to emit spurious DMA interrupts when configured for native
mode and handling ATAPI devices. Stratus were able to pin this bug down and
produce a patch. This is a rework which applies the fixup only to the ESB2
(for now). We can apply it to other chips later if the same problem is found.
This code has been tested and confirmed to fix the problem on the tested
systems.
Signed-off-by: Alan Cox <alan@redhat.com>
(Most of the hard work done by Stratus however)
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/ide/ide-cd.c')
| -rw-r--r-- | drivers/ide/ide-cd.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index 8821494..5969cec 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -687,8 +687,15 @@ static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 sta static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) { struct request *rq = HWGROUP(drive)->rq; + ide_hwif_t *hwif = HWIF(drive); int stat, err, sense_key; + /* We may have bogus DMA interrupts in PIO state here */ + if (HWIF(drive)->dma_status && hwif->atapi_irq_bogon) { + stat = hwif->INB(hwif->dma_status); + /* Should we force the bit as well ? */ + hwif->OUTB(stat, hwif->dma_status); + } /* Check for errors. */ stat = HWIF(drive)->INB(IDE_STATUS_REG); if (stat_ret) |
