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usb: mv_udc: Clean up the initial variable check

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Clean up the code that checks the validity of a USB gadget driver
in usb_gadget_register_driver(). Moreover, limit the speed of the
driver to either FULL or HIGH, this is more precise and once we
have xHCI support, also more correct.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Lei Wen <leiwen@marvell.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut 2013-07-10 03:16:33 +02:00
parent be7ed2533d
commit d76630386d
1 changed files with 5 additions and 6 deletions
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11
drivers/usb/gadget/mv_udc.c
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@ -471,13 +471,12 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
struct mv_udc *udc;
int ret;
if (!driver
|| driver->speed < USB_SPEED_FULL
|| !driver->bind
|| !driver->setup) {
DBG("bad parameter.\n");
if (!driver)
return -EINVAL;
if (!driver->bind || !driver->setup || !driver->disconnect)
return -EINVAL;
if (driver->speed != USB_SPEED_FULL && driver->speed != USB_SPEED_HIGH)
return -EINVAL;
}
ret = usb_lowlevel_init(0, (void **)&controller.ctrl);
if (ret)