linux-kernel - [PATCH v4 1/5]nbd: cleanup nbd_set

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Date:	Thu, 30 Jun 2016 14:02:01 +0300
From:	"Pranay Kr. Srivastava" <pranjas@...il.com>
To:	mpa@...gutronix.de, nbd-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Cc:	"Pranay Kr. Srivastava" <pranaykumar.srivastava@...nizant.com>,
	"Pranay Kr . Srivastava" <pranjas@...il.com>
Subject: [PATCH v4 1/5]nbd: cleanup nbd_set_socket

From: "Pranay Kr. Srivastava" <pranaykumar.srivastava@...nizant.com>

This patch
1) uses spin_lock instead of irq version.

2) removes the goto statement in case a socket
   is already assigned with simple if-else statement.

Signed-off-by: Pranay Kr. Srivastava <pranjas@...il.com>
---
 drivers/block/nbd.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 56f7f5d..766c401 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -643,17 +643,12 @@ static int nbd_set_socket(struct nbd_device *nbd, struct socket *sock)
 {
 	int ret = 0;
 
-	spin_lock_irq(&nbd->sock_lock);
-
-	if (nbd->sock) {
+	spin_lock(&nbd->sock_lock);
+	if (nbd->sock)
 		ret = -EBUSY;
-		goto out;
-	}
-
-	nbd->sock = sock;
-
-out:
-	spin_unlock_irq(&nbd->sock_lock);
+	else
+		nbd->sock = sock;
+	spin_unlock(&nbd->sock_lock);
 
 	return ret;
 }
-- 
1.9.1