[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.

1 files changed, 16 insertions, 4 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 665ae79e1fd6..9f27e8d0e774 100644
--- 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);
         }