diff mbox

[v2,10/14] IB/srpt: Fix a race condition related to wait list processing

Message ID 20180117001418.7852-11-bart.vanassche@wdc.com (mailing list archive)
State Accepted
Headers show

Commit Message

Bart Van Assche Jan. 17, 2018, 12:14 a.m. UTC
Wait list processing only occurs if the channel state >= CH_LIVE. Hence
set the channel state to CH_LIVE before triggering wait list processing
asynchronously.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
---
 drivers/infiniband/ulp/srpt/ib_srpt.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)
diff mbox

Patch

diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index 6278c4448061..372f1eb2fa49 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -2355,18 +2355,20 @@  static void srpt_cm_rtu_recv(struct srpt_rdma_ch *ch)
 		return;
 	}
 
-	/* Trigger wait list processing. */
-	ret = srpt_zerolength_write(ch);
-	WARN_ONCE(ret < 0, "%d\n", ret);
-
 	/*
 	 * Note: calling srpt_close_ch() if the transition to the LIVE state
 	 * fails is not necessary since that means that that function has
 	 * already been invoked from another thread.
 	 */
-	if (!srpt_set_ch_state(ch, CH_LIVE))
+	if (!srpt_set_ch_state(ch, CH_LIVE)) {
 		pr_err("%s-%d: channel transition to LIVE state failed\n",
 		       ch->sess_name, ch->qp->qp_num);
+		return;
+	}
+
+	/* Trigger wait list processing. */
+	ret = srpt_zerolength_write(ch);
+	WARN_ONCE(ret < 0, "%d\n", ret);
 }
 
 /**