drivers: uio: Only allocate new private data when probing device tree node

The same condition should be used both when allocating and freeing the
driver private data.  When dev.of_node is non NULL, allocate a new
private data structure, otherwise use the values from the platform data.
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NDamian Hobson-Garcia <dhobsong@igel.co.jp>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/uio/uio_dmem_genirq.c

@@ -153,7 +153,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
 	int ret = -EINVAL;
 	int i;
 
-	if (!uioinfo) {
+	if (pdev->dev.of_node) {
 		int irq;
 
 		/* alloc uioinfo for one device */

drivers/uio/uio_pdrv_genirq.c

@@ -102,7 +102,7 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
 	int ret = -EINVAL;
 	int i;
 
-	if (!uioinfo) {
+	if (pdev->dev.of_node) {
 		int irq;
 
 		/* alloc uioinfo for one device */