This is a note to let you know that I've just added the patch titled
nvme-tcp: block BH in sk state_change sk callback
to the 5.10-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:
nvme-tcp-block-bh-in-sk-state_change-sk-callback.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c3023bfbfa2d339b6f1e4eea03a96754998acd1d
Author: Sagi Grimberg <sagi@xxxxxxxxxxx>
Date: Sun Mar 21 00:08:48 2021 -0700
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: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver")
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 9444e5e2a95b..4cf81f3841ae 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -874,7 +874,7 @@ 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;
@@ -895,7 +895,7 @@ 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 bool nvme_tcp_queue_more(struct nvme_tcp_queue *queue)
