[libata] Print out SATA speed, if link is up

Make the SATA phy probe messages a bit more informative.

Note this only applies to drivers that use __sata_phy_reset(),
which excludes some drivers.

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 665ae79..9f27e8d 100644 (file)
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1444,11 +1444,23 @@ void __sata_phy_reset(struct ata_port *ap)
        } while (time_before(jiffies, timeout));
 
        /* TODO: phy layer with polling, timeouts, etc. */
-       if (sata_dev_present(ap))
+       sstatus = scr_read(ap, SCR_STATUS);
+       if (sata_dev_present(ap)) {
+               const char *speed;
+               u32 tmp;
+
+               tmp = (sstatus >> 4) & 0xf;
+               if (tmp & (1 << 0))
+                       speed = "1.5";
+               else if (tmp & (1 << 1))
+                       speed = "3.0";
+               else
+                       speed = "<unknown>";
+               printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
+                      ap->id, speed, sstatus);
                ata_port_probe(ap);
-       else {
-               sstatus = scr_read(ap, SCR_STATUS);
-               printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n",
+       } else {
+               printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
                       ap->id, sstatus);
                ata_port_disable(ap);
        }