[3.19.y-ckt stable] Patch "IB/srp: Remove an extraneous scsi_host_put() from an error path" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    IB/srp: Remove an extraneous scsi_host_put() from an error path

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.y-ckt4.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 37c48f0b06a4ebbd5c2fc8c9da0d7adadad18771 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche at sandisk.com>
Date: Mon, 18 May 2015 13:23:14 +0200
Subject: IB/srp: Remove an extraneous scsi_host_put() from an error path

commit fb49c8bbaae70b14fea2b4590a90a21539f88526 upstream.

Fix a scsi_get_host() / scsi_host_put() imbalance in the error
path of srp_create_target(). See also patch "IB/srp: Avoid that
I/O hangs due to a cable pull during LUN scanning" (commit ID
34aa654ecb8e).

Signed-off-by: Bart Van Assche <bart.vanassche at sandisk.com>
Reviewed-by: Sagi Grimberg <sagig at mellanox.com>
Cc: Sebastian Parschauer <sebastian.riemer at profitbricks.com>
Signed-off-by: Doug Ledford <dledford at redhat.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/infiniband/ulp/srp/ib_srp.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 0747c05..a56d256 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -3171,11 +3171,11 @@ static ssize_t srp_create_target(struct device *dev,

 	ret = srp_parse_options(buf, target);
 	if (ret)
-		goto err;
+		goto out;

 	ret = scsi_init_shared_tag_map(target_host, target_host->can_queue);
 	if (ret)
-		goto err;
+		goto out;

 	target->req_ring_size = target->queue_size - SRP_TSK_MGMT_SQ_SIZE;

@@ -3186,7 +3186,7 @@ static ssize_t srp_create_target(struct device *dev,
 			     be64_to_cpu(target->ioc_guid),
 			     be64_to_cpu(target->initiator_ext));
 		ret = -EEXIST;
-		goto err;
+		goto out;
 	}

 	if (!srp_dev->has_fmr && !srp_dev->has_fr && !target->allow_ext_sg &&
@@ -3207,7 +3207,7 @@ static ssize_t srp_create_target(struct device *dev,
 	spin_lock_init(&target->lock);
 	ret = ib_query_gid(ibdev, host->port, 0, &target->sgid);
 	if (ret)
-		goto err;
+		goto out;

 	ret = -ENOMEM;
 	target->ch_count = max_t(unsigned, num_online_nodes(),
@@ -3218,7 +3218,7 @@ static ssize_t srp_create_target(struct device *dev,
 	target->ch = kcalloc(target->ch_count, sizeof(*target->ch),
 			     GFP_KERNEL);
 	if (!target->ch)
-		goto err;
+		goto out;

 	node_idx = 0;
 	for_each_online_node(node) {
@@ -3314,9 +3314,6 @@ err_disconnect:
 	}

 	kfree(target->ch);
-
-err:
-	scsi_host_put(target_host);
 	goto out;
 }

--
1.9.1