[PATCH v2 for-next 1/9] RDMA/rtrs-srv: Do not unconditionally enable irq

[Md Haris Iqbal <haris.iqbal@ionos.com>]

From: Jack Wang <jinpu.wang@ionos.com>

When IO is completed, rtrs can be called in softirq context,
unconditionally enabling irq could cause panic.

To be on safe side, use spin_lock_irqsave and spin_unlock_irqrestore
instread.

Fixes: 9cb837480424 ("RDMA/rtrs: server: main functionality")
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Florian-Ewald Mueller <florian-ewald.mueller@ionos.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Grzegorz Prajsner <grzegorz.prajsner@ionos.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-srv.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index 75e56604e462..ab4200041fd3 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -65,8 +65,9 @@ static bool rtrs_srv_change_state(struct rtrs_srv_path *srv_path,
 {
 	enum rtrs_srv_state old_state;
 	bool changed = false;
+	unsigned long flags;
 
-	spin_lock_irq(&srv_path->state_lock);
+	spin_lock_irqsave(&srv_path->state_lock, flags);
 	old_state = srv_path->state;
 	switch (new_state) {
 	case RTRS_SRV_CONNECTED:
@@ -87,7 +88,7 @@ static bool rtrs_srv_change_state(struct rtrs_srv_path *srv_path,
 	}
 	if (changed)
 		srv_path->state = new_state;
-	spin_unlock_irq(&srv_path->state_lock);
+	spin_unlock_irqrestore(&srv_path->state_lock, flags);
 
 	return changed;
 }
-- 
2.25.1