This is a note to let you know that I've just added the patch titled
RDMA/rtrs-srv: Do not unconditionally enable irq
to the 6.6-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:
rdma-rtrs-srv-do-not-unconditionally-enable-irq.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b5376a2cfec57a0c9a53732bca7e9b10c261ef8f
Author: Jack Wang <jinpu.wang@xxxxxxxxx>
Date: Mon Nov 20 16:41:38 2023 +0100
RDMA/rtrs-srv: Do not unconditionally enable irq
[ Upstream commit 3ee7ecd712048ade6482bea4b2f3dcaf039c0348 ]
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@xxxxxxxxx>
Signed-off-by: Florian-Ewald Mueller <florian-ewald.mueller@xxxxxxxxx>
Signed-off-by: Md Haris Iqbal <haris.iqbal@xxxxxxxxx>
Signed-off-by: Grzegorz Prajsner <grzegorz.prajsner@xxxxxxxxx>
Link: https://lore.kernel.org/r/20231120154146.920486-2-haris.iqbal@xxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index 75e56604e4628..ab4200041fd36 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;
}
