Commit c2a65852 authored Apr 03, 2006 by Tejun Heo Committed by Jeff Garzik Apr 04, 2006

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



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>

parent 95de719a

drivers/scsi/ahci.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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) {

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