[PATCH] libata: PHY reset requires writing 0x4 to SControl

Hi,

Reading the Intel VSC and AHCI it seems like writing 0x302 is incorrect.
The only valid values are 4, 1 and 0.  Writing 4 disables the
PHY.
Signed-off-by: NMartin Hicks <mort@bork.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/scsi/libata-core.c

@@ -2746,7 +2746,7 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
 		if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
 			return rc;
 
-		scontrol = (scontrol & 0x0f0) | 0x302;
+		scontrol = (scontrol & 0x0f0) | 0x304;
 
 		if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
 			return rc;