arm: mvebu : sata_mv should probe all ports

While a board could have multiple SATA ports, some of the ports might
not have a disk attached to them. So while probing for disks,
sata_mv_probe() should continue probing all ports, and skip one with
no disk attached.

Tests with:

- Seagate Goflex Net (Marvell Kirkwood 88F6281) out-of-tree u-boot.
- Zyxel NSA325 (Marvell Kirkwood 88F6282 out-of-tree u-boot.

Observation:

If a board has 2 or more SATA ports, and there is only one disk
attached to one of the ports, sata_mv_probe() does not return
a successful probe status. And if only one disk is attached to the
2nd port (i.e. port 1), it is not probed at all.

Patch Description:

Let sata_mv_probe() continues probing all ports, even if there
is error in probing a given port, and then return a successful
status if there is at least one port was probed successfully.

Signed-off-by: Tony Dinh <mibodhi@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index dadb2c7..003222d 100644 (file)
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1068,6 +1068,7 @@ static int sata_mv_probe(struct udevice *dev)
        int nr_ports;
        int ret;
        int i;
+       int status = -ENODEV; /* If the probe fails to detected any SATA port */
 
        /* Get number of ports of this SATA controller */
        nr_ports = min(fdtdec_get_int(blob, node, "nr-ports", -1),
@@ -1078,7 +1079,7 @@ static int sata_mv_probe(struct udevice *dev)
                                         IF_TYPE_SATA, -1, 512, 0, &blk);
                if (ret) {
                        debug("Can't create device\n");
-                       return ret;
+                       continue;
                }
 
                priv = dev_get_plat(blk);
@@ -1088,18 +1089,23 @@ static int sata_mv_probe(struct udevice *dev)
                ret = sata_mv_init_sata(blk, i);
                if (ret) {
                        debug("%s: Failed to init bus\n", __func__);
-                       return ret;
+                       continue;
                }
 
                /* Scan SATA port */
                ret = sata_mv_scan_sata(blk, i);
                if (ret) {
                        debug("%s: Failed to scan bus\n", __func__);
-                       return ret;
+                       continue;
                }
+
+               /* If we got here, the current SATA port was probed
+                * successfully, so set the probe status to successful.
+                */
+               status = 0;
        }
 
-       return 0;
+       return status;
 }
 
 static int sata_mv_scan(struct udevice *dev)