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nvme-tcp: block BH in sk state_change sk callback 

[ Upstream commit 8b73b45d54a14588f86792869bfb23098ea254cb ]

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

Fixes: 3f2304f8c6 ("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>
This commit is contained in:
Sagi Grimberg 2021-03-21 00:08:48 -07:00 committed by Greg Kroah-Hartman
parent 4bbae57c7b
commit ced0760eb4
1 changed files with 2 additions and 2 deletions
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4
drivers/nvme/host/tcp.c
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@ -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)