[SCSI] qla2xxx: Get the link data rate explicitly during device resync.

When the hba port gets logged out of the fabric, or other
such transitional state when the physical link is still present,
the driver doesn't receive a loop up asyn event (where the link
data rate currently gets set). Hence send a explicit mailbox command
to get the link rate in such conditions.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

3 files changed, 36 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 0b6801f..f61fb8d 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -324,6 +324,7 @@ qla2x00_read_ram_word(scsi_qla_host_t *, uint32_t, uint32_t *);
 extern int
 qla2x00_write_ram_word(scsi_qla_host_t *, uint32_t, uint32_t);
 
+extern int qla2x00_get_data_rate(scsi_qla_host_t *);
 /*
  * Global Function Prototypes in qla_isr.c source file.
  */
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 73a7935..0f7ea6c 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2266,6 +2266,8 @@ qla2x00_configure_loop(scsi_qla_host_t *vha)
 	clear_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
 	clear_bit(RSCN_UPDATE, &vha->dpc_flags);
 
+	qla2x00_get_data_rate(vha);
+
 	/* Determine what we need to do */
 	if (ha->current_topology == ISP_CFG_FL &&
 	    (test_bit(LOCAL_LOOP_UPDATE, &flags))) {
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 05d595d..e91f3d8 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3643,3 +3643,36 @@ qla2x00_write_ram_word(scsi_qla_host_t *vha, uint32_t risc_addr, uint32_t data)
 
 	return rval;
 }
+
+int
+qla2x00_get_data_rate(scsi_qla_host_t *vha)
+{
+	int rval;
+	mbx_cmd_t mc;
+	mbx_cmd_t *mcp = &mc;
+	struct qla_hw_data *ha = vha->hw;
+
+	if (!IS_FWI2_CAPABLE(ha))
+		return QLA_FUNCTION_FAILED;
+
+	DEBUG11(printk(KERN_INFO "%s(%ld): entered.\n", __func__, vha->host_no));
+
+	mcp->mb[0] = MBC_DATA_RATE;
+	mcp->mb[1] = 0;
+	mcp->out_mb = MBX_1|MBX_0;
+	mcp->in_mb = MBX_2|MBX_1|MBX_0;
+	mcp->tov = MBX_TOV_SECONDS;
+	mcp->flags = 0;
+	rval = qla2x00_mailbox_command(vha, mcp);
+	if (rval != QLA_SUCCESS) {
+		DEBUG2_3_11(printk(KERN_INFO "%s(%ld): failed=%x mb[0]=%x.\n",
+		    __func__, vha->host_no, rval, mcp->mb[0]));
+	} else {
+		DEBUG11(printk(KERN_INFO
+		    "%s(%ld): done.\n", __func__, vha->host_no));
+		if (mcp->mb[1] != 0x7)
+			ha->link_data_rate = mcp->mb[1];
+	}
+
+	return rval;
+}