USB: r8a66597-hcd: fix NULL access
This patch fixes the problem that accesses NULL pointer
when disconnected a cable while play music with usb-speaker.
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index af13f1f..a7a7070 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -47,7 +47,7 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yoshihiro Shimoda");
-#define DRIVER_VERSION "9 May 2007"
+#define DRIVER_VERSION "29 May 2007"
static const char hcd_name[] = "r8a66597_hcd";
@@ -544,6 +544,9 @@
unsigned char endpoint = usb_pipeendpoint(urb->pipe);
unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
+ if (!toggle)
+ return;
+
r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
}