From: Wojtek Kaniewski <[EMAIL PROTECTED]>
This patch performs additional checks in at91_udc, just in case of
some spurious interrupts or device enumeration.
Signed-off-by: Wojtek Kaniewski <[EMAIL PROTECTED]>
Acked-by: David Brownell <[EMAIL PROTECTED]>
Cc: Andrew Victor <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/gadget/at91_udc.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
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 @@ 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",
--
1.4.4.2
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