Target/iser: Bail from accept_np if np_thread is trying to close

In case np_thread state is in RESET/SHUTDOWN/EXIT states,
no point for isert to stall there as we may get a hang in
case no one will wake it up later.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index a1710465faaf2345ae9c88755790e3e74a6e76e8..7676bcb7105aac073202cc29e3231bea26dbc23d 100644 (file)
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -3154,9 +3154,14 @@ accept_wait:
                return -ENODEV;
 
        spin_lock_bh(&np->np_thread_lock);
-       if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
+       if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) {
                spin_unlock_bh(&np->np_thread_lock);
-               pr_debug("ISCSI_NP_THREAD_RESET for isert_accept_np\n");
+               pr_debug("np_thread_state %d for isert_accept_np\n",
+                        np->np_thread_state);
+               /**
+                * No point in stalling here when np_thread
+                * is in state RESET/SHUTDOWN/EXIT - bail
+                **/
                return -ENODEV;
        }
        spin_unlock_bh(&np->np_thread_lock);