Staging: vme: devices: Use kasprintf

This patch uses kasprintf which combines kmalloc and sprintf.
kasprintf also takes care of the size calculation.

This is done using Coccinelle. Semantic patch used is as follows:

@@
expression a,flag;
expression list args;
statement S;
@@

 a =
- \(kmalloc\|kzalloc\)(...,flag)
+ kasprintf (flag,args)
  <... when != a
  if (a == NULL || ...) S
  ...>
- sprintf(a,args);
Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vme/devices/vme_pio2_gpio.c

@@ -191,11 +191,11 @@ int pio2_gpio_init(struct pio2_card *card)
 	int retval = 0;
 	char *label;
 
-	label = kmalloc(PIO2_NUM_CHANNELS, GFP_KERNEL);
+	label = kasprintf(GFP_KERNEL,
+			  "%s@%s", driver_name, dev_name(&card->vdev->dev));
 	if (label == NULL)
 		return -ENOMEM;
 
-	sprintf(label, "%s@%s", driver_name, dev_name(&card->vdev->dev));
 	card->gc.label = label;
 
 	card->gc.ngpio = PIO2_NUM_CHANNELS;