V4L/DVB (13231): pwc: Use kernel's simple_strtol()

Change own implementation of pwc_atoi() by simple_strtol(x, NULL, 10).
Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/pwc/pwc-if.c

@@ -68,6 +68,7 @@
 #endif
 #include <linux/vmalloc.h>
 #include <asm/io.h>
+#include <linux/kernel.h>		/* simple_strtol() */
 
 #include "pwc.h"
 #include "pwc-kiara.h"
@@ -1916,19 +1917,6 @@ static void usb_pwc_disconnect(struct usb_interface *intf)
 	unlock_kernel();
 }
 
-/* *grunt* We have to do atoi ourselves :-( */
-static int pwc_atoi(const char *s)
-{
-	int k = 0;
-
-	k = 0;
-	while (*s != '\0' && *s >= '0' && *s <= '9') {
-		k = 10 * k + (*s - '0');
-		s++;
-	}
-	return k;
-}
-
 
 /*
  * Initialization code & module stuff
@@ -2078,13 +2066,16 @@ static int __init usb_pwc_init(void)
 				}
 				else {
 					/* No type or serial number specified, just a number. */
-					device_hint[i].device_node = pwc_atoi(s);
+					device_hint[i].device_node =
+						simple_strtol(s, NULL, 10);
 				}
 			}
 			else {
 				/* There's a colon, so we have at least a type and a device node */
-				device_hint[i].type = pwc_atoi(s);
-				device_hint[i].device_node = pwc_atoi(colon + 1);
+				device_hint[i].type =
+					simple_strtol(s, NULL, 10);
+				device_hint[i].device_node =
+					simple_strtol(colon + 1, NULL, 10);
 				if (*dot != '\0') {
 					/* There's a serial number as well */
 					int k;