5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jack Wang jinpu.wang@ionos.com
[ 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@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 Link: https://lore.kernel.org/r/20231120154146.920486-2-haris.iqbal@ionos.com Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 733116554e0bc..9f7f694036f72 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -72,8 +72,9 @@ 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: @@ -94,7 +95,7 @@ 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; }