USB: at91_udc: Additional checks
This patch performs additional checks in at91_udc, just in case of
some spurious interrupts or device enumeration.
Signed-off-by: Wojtek Kaniewski <wojtekka@toxygen.net>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 1926d39..812c733 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -955,7 +955,10 @@
// VDBG("vbus %s\n", is_active ? "on" : "off");
local_irq_save(flags);
udc->vbus = (is_active != 0);
- pullup(udc, is_active);
+ if (udc->driver)
+ pullup(udc, is_active);
+ else
+ pullup(udc, 0);
local_irq_restore(flags);
return 0;
}
@@ -1241,7 +1244,10 @@
#undef w_length
/* pass request up to the gadget driver */
- status = udc->driver->setup(&udc->gadget, &pkt.r);
+ if (udc->driver)
+ status = udc->driver->setup(&udc->gadget, &pkt.r);
+ else
+ status = -ENODEV;
if (status < 0) {
stall:
VDBG("req %02x.%02x protocol STALL; stat %d\n",