Block the SCSI host while reconnecting instead of representing
the reconnect activity as a distinct SRP target state.

Signed-off-by: Bart Van Assche <[email protected]>
Cc: David Dillow <[email protected]>
Cc: Roland Dreier <[email protected]>
---
 drivers/infiniband/ulp/srp/ib_srp.c |   16 ++++++++--------
 drivers/infiniband/ulp/srp/ib_srp.h |    1 -
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c 
b/drivers/infiniband/ulp/srp/ib_srp.c
index 6279343..04fbc43 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -610,13 +610,16 @@ static void srp_reset_req(struct srp_target_port *target, 
struct srp_request *re
 
 static int srp_reconnect_target(struct srp_target_port *target)
 {
+       struct Scsi_Host *shost = target->scsi_host;
        struct ib_qp_attr qp_attr;
        struct ib_wc wc;
        int i, ret;
 
-       if (!srp_change_state(target, SRP_TARGET_LIVE, SRP_TARGET_CONNECTING))
+       if (target->state != SRP_TARGET_LIVE)
                return -EAGAIN;
 
+       scsi_target_block(&shost->shost_gendev);
+
        srp_disconnect_target(target);
        /*
         * Now get a new local CM ID so that we avoid confusing the
@@ -654,8 +657,7 @@ static int srp_reconnect_target(struct srp_target_port 
*target)
        if (ret)
                goto err;
 
-       if (!srp_change_state(target, SRP_TARGET_CONNECTING, SRP_TARGET_LIVE))
-               ret = -EAGAIN;
+       scsi_target_unblock(&shost->shost_gendev);
 
        return ret;
 
@@ -673,13 +675,15 @@ err:
         * the flush_scheduled_work() in srp_remove_one().
         */
        spin_lock_irq(&target->lock);
-       if (target->state == SRP_TARGET_CONNECTING) {
+       if (target->state == SRP_TARGET_LIVE) {
                target->state = SRP_TARGET_DEAD;
                INIT_WORK(&target->work, srp_remove_work);
                queue_work(ib_wq, &target->work);
        }
        spin_unlock_irq(&target->lock);
 
+       scsi_target_unblock(&shost->shost_gendev);
+
        return ret;
 }
 
@@ -1268,9 +1272,6 @@ static int srp_queuecommand(struct Scsi_Host *shost, 
struct scsi_cmnd *scmnd)
        unsigned long flags;
        int len;
 
-       if (target->state == SRP_TARGET_CONNECTING)
-               goto err;
-
        if (target->state == SRP_TARGET_DEAD ||
            target->state == SRP_TARGET_REMOVED) {
                scmnd->result = DID_BAD_TARGET << 16;
@@ -1334,7 +1335,6 @@ err_iu:
 err_unlock:
        spin_unlock_irqrestore(&target->lock, flags);
 
-err:
        return SCSI_MLQUEUE_HOST_BUSY;
 }
 
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h 
b/drivers/infiniband/ulp/srp/ib_srp.h
index f0daeb3..02dc3ac 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -80,7 +80,6 @@ enum {
 
 enum srp_target_state {
        SRP_TARGET_LIVE,
-       SRP_TARGET_CONNECTING,
        SRP_TARGET_DEAD,
        SRP_TARGET_REMOVED
 };
-- 
1.7.7


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