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Subject[PATCH 5.4 151/244] nvme-tcp: block BH in sk state_change sk callback
Date
From: Sagi Grimberg <sagi@grimberg.me>

[ Upstream commit 8b73b45d54a14588f86792869bfb23098ea254cb ]

The TCP stack can run from process context for a long time
so we should disable BH here.

Fixes: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/tcp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index ac3503ea54c4..718152adc625 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -816,7 +816,7 @@ static void nvme_tcp_state_change(struct sock *sk)
{
struct nvme_tcp_queue *queue;

- read_lock(&sk->sk_callback_lock);
+ read_lock_bh(&sk->sk_callback_lock);
queue = sk->sk_user_data;
if (!queue)
goto done;
@@ -838,7 +838,7 @@ static void nvme_tcp_state_change(struct sock *sk)

queue->state_change(sk);
done:
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
}

static inline void nvme_tcp_done_send_req(struct nvme_tcp_queue *queue)
--
2.30.2


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