staging: unisys: visorbus: convert ret to err to be consistent

The ret variable was only returning an error, so changing it to err to
be more consistent across the file.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -108,19 +108,19 @@ static ssize_t toolaction_store(struct device *dev,
 				const char *buf, size_t count)
 {
 	u8 tool_action;
-	int ret;
+	int err;
 
 	if (kstrtou8(buf, 10, &tool_action))
 		return -EINVAL;
 
-	ret = visorchannel_write
+	err = visorchannel_write
 		(chipset_dev->controlvm_channel,
 		 offsetof(struct spar_controlvm_channel_protocol,
 			  tool_action),
 		 &tool_action, sizeof(u8));
 
-	if (ret)
-		return ret;
+	if (err)
+		return err;
 	return count;
 }
 static DEVICE_ATTR_RW(toolaction);