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usb: chipidea: udc: fix setup of endpoint maxpacket size

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This patch changes the setup of the endpoint maxpacket size. All non control
endpoints are initialized with an undefined ((unsigned short)~0) maxpacket
size. The maxpacket size of Endpoint 0 will be kept at CTRL_PAYLOAD_MAX.

Some gadget drivers check for the maxpacket size before they enable the
endpoint, which leads to a wrong state in these drivers.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Grzeschik 2012-09-12 14:58:00 +03:00 committed by Greg Kroah-Hartman
parent fea7a08acb
commit 7f67c38bdc
1 changed files with 7 additions and 1 deletions
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8
drivers/usb/chipidea/udc.c
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@ -1455,7 +1455,12 @@ static int init_eps(struct ci13xxx *ci)
mEp->ep.name = mEp->name;
mEp->ep.ops = &usb_ep_ops;
mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
/*
* for ep0: maxP defined in desc, for other
* eps, maxP is set by epautoconfig() called
* by gadget layer
*/
mEp->ep.maxpacket = (unsigned short)~0;
INIT_LIST_HEAD(&mEp->qh.queue);
mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL,
@ -1475,6 +1480,7 @@ static int init_eps(struct ci13xxx *ci)
else
ci->ep0in = mEp;
mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
continue;
}