Commit 62ba2841 authored Jun 26, 2005 by Tejun Heo Committed by Jeff Garzik Jun 28, 2005

[PATCH] libata: lengthen COMMRESET delay



This patch lengthens the delay between DET setting and clearing for
COMMRESET from 400us to 1ms.  I couldn't find any requiremen regarding
the duration of COMMRESET in SATA I/II specs but AHCI-1.1 10.4.2
states that it should be at least 1ms.

Signed-off-by: Tejun Heo <htejun@gmail.com>

parent e922256a

drivers/scsi/libata-core.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1408,7 +1408,9 @@ void __sata_phy_reset(struct ata_port *ap)
		if (ap->flags & ATA_FLAG_SATA_RESET) {
		/* issue phy wake/reset */
		scr_write_flush(ap, SCR_CONTROL, 0x301);
		udelay(400); /* FIXME: a guess */
		/* Couldn't find anything in SATA I/II specs, but
		* AHCI-1.1 10.4.2 says at least 1 ms. */
		mdelay(1);
		}
		scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */