linux-kernel - [PATCH 4.19 352/639] lightnvm: pblk: fix lock order in pblk_rb_tear_down

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Message-Id: <20200124093131.204616416@linuxfoundation.org>
Date:   Fri, 24 Jan 2020 10:28:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Igor Konopko <igor.j.konopko@...el.com>,
        Javier González <javier@...igon.com>,
        Hans Holmberg <hans.holmberg@...xlabs.com>,
        Matias Bjørling <mb@...htnvm.io>,
        Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 352/639] lightnvm: pblk: fix lock order in pblk_rb_tear_down_check

From: Igor Konopko <igor.j.konopko@...el.com>

[ Upstream commit 486b5aac85f6ec0b2df3e82a6a629d5eb7804db5 ]

In pblk_rb_tear_down_check() the spinlock functions are not
called in proper order.

Fixes: a4bd217 ("lightnvm: physical block device (pblk) target")
Signed-off-by: Igor Konopko <igor.j.konopko@...el.com>
Reviewed-by: Javier González <javier@...igon.com>
Reviewed-by: Hans Holmberg <hans.holmberg@...xlabs.com>
Signed-off-by: Matias Bjørling <mb@...htnvm.io>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/lightnvm/pblk-rb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/lightnvm/pblk-rb.c b/drivers/lightnvm/pblk-rb.c
index f6eec0212dfcf..d22c13b556221 100644
--- a/drivers/lightnvm/pblk-rb.c
+++ b/drivers/lightnvm/pblk-rb.c
@@ -784,8 +784,8 @@ int pblk_rb_tear_down_check(struct pblk_rb *rb)
 	}
 
 out:
-	spin_unlock(&rb->w_lock);
 	spin_unlock_irq(&rb->s_lock);
+	spin_unlock(&rb->w_lock);
 
 	return ret;
 }
-- 
2.20.1