linux-kernel - [PATCH v2] staging: unisys: use common return path

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Date:	Tue,  1 Dec 2015 16:22:33 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Benjamin Romer <benjamin.romer@...sys.com>,
	David Kershner <david.kershner@...sys.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, sparmaintainer@...sys.com,
	devel@...verdev.osuosl.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH v2] staging: unisys: use common return path

The success path and the error path both are first doing
spin_unlock_irqrestore() before returning. Use that in the common path
and return the success/error value.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

v2: changed label name

It is dependent on the patch series sent by Benjamin (Nov 30th).

 drivers/staging/unisys/visornic/visornic_main.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c
index 77fd1ef..342c0bf 100644
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ b/drivers/staging/unisys/visornic/visornic_main.c
@@ -357,15 +357,16 @@ visornic_serverdown(struct visornic_devdata *devdata,
 		    visorbus_state_complete_func complete_func)
 {
 	unsigned long flags;
+	int retval = 0;
 
 	spin_lock_irqsave(&devdata->priv_lock, flags);
 	if (!devdata->server_down && !devdata->server_change_state) {
 		if (devdata->going_away) {
-			spin_unlock_irqrestore(&devdata->priv_lock, flags);
 			dev_dbg(&devdata->dev->device,
 				"%s aborting because device removal pending\n",
 				__func__);
-			return -ENODEV;
+			retval = -ENODEV;
+			goto error;
 		}
 		devdata->server_change_state = true;
 		devdata->server_down_complete_func = complete_func;
@@ -374,11 +375,12 @@ visornic_serverdown(struct visornic_devdata *devdata,
 	} else if (devdata->server_change_state) {
 		dev_dbg(&devdata->dev->device, "%s changing state\n",
 			__func__);
-		spin_unlock_irqrestore(&devdata->priv_lock, flags);
-		return -EINVAL;
+		retval = -EINVAL;
 	}
+
+unlock:
 	spin_unlock_irqrestore(&devdata->priv_lock, flags);
-	return 0;
+	return retval;
 }
 
 /**
-- 
1.9.1

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