[PATCH 3.10 50/77] Target/iser: Bail from accept_np if np_thread is trying to close

Greg Kroah-Hartman
2014-06-28T19:06:59Z

From: Sagi Grimberg <sagig@mellanox.com>

commit e346ab343f4f58c12a96725c7b13df9cc2ad56f6 upstream.

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>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/infiniband/ulp/isert/ib_isert.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -2190,9 +2190,14 @@ 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);