USB: pxa27x_udc - Fix Oops

udc_disable oopses dereferencing udc_command.

Signed-off-by: Karl Beldan <karl.beldan@gmail.com>
Acked-by: Robert Jarzmik <rjarzmik@free.fr>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 499b7a2..e02bfd4 100644 (file)
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1526,7 +1526,8 @@ static void udc_disable(struct pxa_udc *udc)
 
        ep0_idle(udc);
        udc->gadget.speed = USB_SPEED_UNKNOWN;
-       udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
+       if (udc->mach->udc_command)
+               udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
 }
 
 /**