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ide: fix setting nIEN on idle devices

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Fix do_ide_request() to operate on previous device / port instead of
the current one.  The original code was wrong since at least Feb 2002
(2.4.0 timeframe).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-01-06 17:20:47 +01:00
parent b46f205da6
commit 42cf2611b2
1 changed files with 6 additions and 4 deletions
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10
drivers/ide/ide-io.c
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@ -724,7 +724,9 @@ void do_ide_request(struct request_queue *q)
spin_lock_irq(&hwgroup->lock);
if (!ide_lock_hwgroup(hwgroup)) {
ide_hwif_t *prev_port;
repeat:
prev_port = hwgroup->hwif;
hwgroup->rq = NULL;
if (drive->dev_flags & IDE_DFLAG_SLEEPING) {
@ -734,13 +736,13 @@ void do_ide_request(struct request_queue *q)
}
}
if (hwif != hwgroup->hwif) {
if (hwif != prev_port) {
/*
* set nIEN for previous hwif, drives in the
* set nIEN for previous port, drives in the
* quirk_list may not like intr setups/cleanups
*/
if (drive->quirk_list == 0)
hwif->tp_ops->set_irq(hwif, 0);
if (hwgroup->drive->quirk_list == 0)
prev_port->tp_ops->set_irq(prev_port, 0);
}
hwgroup->hwif = hwif;
hwgroup->drive = drive;