Patch "IB/srp: Fix a connection setup race" has been added to the 4.1-stable tree

Patch "IB/srp: Fix a connection setup race" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    IB/srp: Fix a connection setup race

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ib-srp-fix-a-connection-setup-race.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 8de9fe3a1d4ac8c3e4953fa4b7d81f863f5196ad Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@sandisk.com>
Date: Mon, 18 May 2015 13:23:36 +0200
Subject: IB/srp: Fix a connection setup race

From: Bart Van Assche <bart.vanassche@sandisk.com>

commit 8de9fe3a1d4ac8c3e4953fa4b7d81f863f5196ad upstream.

Avoid that receiving a DREQ while RDMA channels are being
established causes target->qp_in_error to be reset.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Sebastian Parschauer <sebastian.riemer@profitbricks.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/ulp/srp/ib_srp.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -993,8 +993,6 @@ static int srp_connect_ch(struct srp_rdm
 
 	WARN_ON_ONCE(!multich && target->connected);
 
-	target->qp_in_error = false;
-
 	ret = srp_lookup_path(ch);
 	if (ret)
 		return ret;
@@ -1243,6 +1241,9 @@ static int srp_rport_reconnect(struct sr
 		for (j = 0; j < target->queue_size; ++j)
 			list_add(&ch->tx_ring[j]->list, &ch->free_tx);
 	}
+
+	target->qp_in_error = false;
+
 	for (i = 0; i < target->ch_count; i++) {
 		ch = &target->ch[i];
 		if (ret || !ch->target) {


Patches currently in stable-queue which might be from bart.vanassche@sandisk.com are

queue-4.1/ib-srp-fix-a-connection-setup-race.patch
queue-4.1/scsi_transport_srp-introduce-srp_wait_for_queuecommand.patch
queue-4.1/ib-srp-fix-connection-state-tracking.patch
queue-4.1/ib-srp-fix-reconnection-failure-handling.patch
queue-4.1/scsi_transport_srp-fix-a-race-condition.patch
queue-4.1/ib-srp-remove-an-extraneous-scsi_host_put-from-an-error-path.patch