From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: propagate AltStatus workarounds to ide_driveid_update()
Propagate AltStatus workarounds from try_to_identify()
to ide_driveid_update().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-iops.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
Index: b/drivers/ide/ide-iops.c
===================================================================
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -293,8 +293,8 @@ int ide_driveid_update(ide_drive_t *driv
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
u16 *id;
unsigned long flags;
- int rc;
- u8 uninitialized_var(s);
+ int use_altstatus = 0, rc;
+ u8 a, uninitialized_var(s);
id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
if (id == NULL)
@@ -308,9 +308,24 @@ int ide_driveid_update(ide_drive_t *driv
SELECT_MASK(drive, 1);
tp_ops->set_irq(hwif, 0);
msleep(50);
+
+ if (hwif->io_ports.ctl_addr &&
+ (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
+ a = tp_ops->read_altstatus(hwif);
+ s = tp_ops->read_status(hwif);
+ if ((a ^ s) & ~ATA_IDX)
+ /* ancient Seagate drives, broken interfaces */
+ printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
+ "instead of ALTSTATUS(0x%02x)\n",
+ drive->name, s, a);
+ else
+ /* use non-intrusive polling */
+ use_altstatus = 1;
+ }
+
tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
- if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
+ if (ide_busy_sleep(hwif, WAIT_WORSTCASE, use_altstatus)) {
rc = 1;
goto out_err;
}
--
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