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authorWojtek Kaniewski <wojtekka@toxygen.net>2006-12-08 03:26:00 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-12-20 10:14:27 -0800
commitbfb7fb79e913f60330037d1f302efee28d5f6770 (patch)
treee5c0fb70b4f7e57372baccc94bbef00e64e69146 /drivers/usb/gadget/at91_udc.c
parent943c441948581bd01ab196a4d32da88bfa0f13ce (diff)
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>
Diffstat (limited to 'drivers/usb/gadget/at91_udc.c')
-rw-r--r--drivers/usb/gadget/at91_udc.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 1926d39e480..812c733ba8c 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -955,7 +955,10 @@ static int at91_vbus_session(struct usb_gadget *gadget, int is_active)
// 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 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr)
#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",