linux-kernel - [PATCH v2 1/5] fuse: Kill fasync only if interrupt is queued in queue

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Message-ID: <154166792021.10655.6752271937511795324.stgit@localhost.localdomain>
Date:   Thu, 08 Nov 2018 12:05:20 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     miklos@...redi.hu, ktkhai@...tuozzo.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/5] fuse: Kill fasync only if interrupt is queued in
 queue_interrupt()

We should sent signal only in case of interrupt is really queued.
Not a real problem, but this makes the code clearer and intuitive.

v2: Move kill_fasync() under fiq->waitq.lock

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
 fs/fuse/dev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index ae813e609932..1ecec7fcb841 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -476,9 +476,9 @@ static void queue_interrupt(struct fuse_iqueue *fiq, struct fuse_req *req)
 	if (list_empty(&req->intr_entry)) {
 		list_add_tail(&req->intr_entry, &fiq->interrupts);
 		wake_up_locked(&fiq->waitq);
+		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
 	}
 	spin_unlock(&fiq->waitq.lock);
-	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
 }
 
 static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)