[SCSI] qla2xxx: Correctly read sfp single byte mailbox register.

When reading a single byte using the READ SFP mailbox command, the
single byte of data is returned in MB[1] and not MB[8].

The reason that MB[8] was being used is that the spec was unclear
as it evolved over time; and we have not needed to read a single
byte until recently.

Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 975aeaa..aab628b 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3608,14 +3608,14 @@ qla2x00_read_edc(scsi_qla_host_t *vha, uint16_t dev, uint16_t adr,
        mcp->mb[9] = adr;
        mcp->mb[10] = opt;
        mcp->out_mb = MBX_10|MBX_9|MBX_8|MBX_7|MBX_6|MBX_3|MBX_2|MBX_1|MBX_0;
-       mcp->in_mb = MBX_0;
+       mcp->in_mb = MBX_1|MBX_0;
        mcp->tov = MBX_TOV_SECONDS;
        mcp->flags = 0;
        rval = qla2x00_mailbox_command(vha, mcp);
 
        if (opt & BIT_0)
                if (sfp)
-                       *sfp = mcp->mb[8];
+                       *sfp = mcp->mb[1];
 
        if (rval != QLA_SUCCESS) {
                DEBUG2_3_11(printk("%s(%ld): failed=%x (%x).\n", __func__,