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[PATCH] ahci: do not fail softreset if PHY reports no device

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All softreset methods are responsible for detecting device presence
and succeed softreset in such cases.  AHCI didn't use to check for
device presence before proceeding with softreset and this caused
unnecessary reset retrials during probing.  This patch adds presence
detection to AHCI softreset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-04-03 01:58:06 +09:00 committed by Jeff Garzik
parent 95de719adc
commit c2a6585296
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/ahci.c
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@ -549,6 +549,12 @@ static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class)
DPRINTK("ENTER\n");
if (!sata_dev_present(ap)) {
DPRINTK("PHY reports no device\n");
*class = ATA_DEV_NONE;
return 0;
}
/* prepare for SRST (AHCI-1.1 10.4.1) */
rc = ahci_stop_engine(ap);
if (rc) {