From: Michael Grzeschik <m.grzesc...@pengutronix.de>
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: <sta...@vger.kernel.org>
Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>
Acked-by: Felipe Balbi <ba...@ti.com>
Signed-off-by: Marc Kleine-Budde <m...@pengutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shish...@linux.intel.com>
---
drivers/usb/chipidea/udc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index c7a032a..7801a3f 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -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;
}
--
1.7.10.4
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