[SCSI] Revert "[SCSI] libsas: fix sas port naming"

This reverts commit a692b0eec5efae382dfa800e8b4b083f172921a7.

Tom reports:

[    8.741033] ------------[ cut here ]------------
[    8.741038] WARNING: at fs/sysfs/dir.c:508 sysfs_add_one+0xc1/0xf0()
[    8.741040] Hardware name: To Be Filled By O.E.M.
[    8.741041] sysfs: cannot create duplicate filename

...and missing 2 out of 4 drives connected to mvsas.  Commit a692b0ee
made the assumption that all the phy ids an lldd registers to libsas are
unique.  However, in the "multi-chip" case mvsas does a rather annoying
duplication of phy ids in the array passed to libsas.  So, for example,
chip0 has phy0-3 at ha phy index 0-3 and chip1 has its phy0-3 at ha phy
index 4-7.  The more natural model would be to create a scsi_host (and
sas_ha) per chip (controller), but for now revert the naming fix which
unfortunately means dealing with unpredictable end-device names for a
bit longer.

Cc: Xiangliang Yu <yuxiangl@marvell.com>
Cc: Patrick Thomson <patrick.s.thomson@intel.com>
Reported-by: Tom Rini <trini@ti.com>
Tested-by: Tom Rini <trini@ti.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index 1cf7d75..e884a8c 100644 (file)
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -123,7 +123,7 @@ static void sas_form_port(struct asd_sas_phy *phy)
        spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
 
        if (!port->port) {
-               port->port = sas_port_alloc(phy->phy->dev.parent, phy->id);
+               port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
                BUG_ON(!port->port);
                sas_port_add(port->port);
        }