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ide: change master/slave IDENTIFY order

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Need to probe slave device first to make it release PDIAG-
(this is required for correct device side cable detection).

Based on libata commit f31f0cc2f0.

Thanks to Craig for testing this patch.

Cc: Craig Block <chblock3@yahoo.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-13 17:47:51 +02:00
parent 88b2b32bab
commit b140b99c41
2 changed files with 3 additions and 5 deletions
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1
drivers/ide/ide-iops.c
View file

@ -613,7 +613,6 @@ u8 eighty_ninty_three (ide_drive_t *drive)
/*
* FIXME:
* - change master/slave IDENTIFY order
* - force bit13 (80c cable present) check also for !ivb devices
* (unless the slave device is pre-ATA3)
*/

7
drivers/ide/ide-probe.c
View file

@ -719,9 +719,9 @@ EXPORT_SYMBOL_GPL(ide_undecoded_slave);
*/
static void probe_hwif(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif))
{
unsigned int unit;
unsigned long flags;
unsigned int irqd;
int unit;
if (hwif->noprobe)
return;
@ -777,10 +777,9 @@ static void probe_hwif(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif))
printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
/*
* Second drive should only exist if first drive was found,
* but a lot of cdrom drives are configured as single slaves.
* Need to probe slave device first to make it release PDIAG-.
*/
for (unit = 0; unit < MAX_DRIVES; ++unit) {
for (unit = MAX_DRIVES - 1; unit >= 0; unit--) {
ide_drive_t *drive = &hwif->drives[unit];
drive->dn = (hwif->channel ? 2 : 0) + unit;
(void) probe_for_drive(drive);