This is a note to let you know that I've just added the patch titled
usb: chipidea: udc: fix setup of endpoint maxpacket size
to the 3.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-chipidea-udc-fix-setup-of-endpoint-maxpacket-size.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 7f67c38bdcb6d8bce02e10521fbf1618b586319f Mon Sep 17 00:00:00 2001
From: Michael Grzeschik <[email protected]>
Date: Wed, 12 Sep 2012 14:58:00 +0300
Subject: usb: chipidea: udc: fix setup of endpoint maxpacket size
From: Michael Grzeschik <[email protected]>
commit 7f67c38bdcb6d8bce02e10521fbf1618b586319f upstream.
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.
Signed-off-by: Michael Grzeschik <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
Signed-off-by: Alexander Shishkin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/chipidea/udc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1468,7 +1468,12 @@ static int init_eps(struct ci13xxx *udc)
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(udc->qh_pool, GFP_KERNEL,
@@ -1488,6 +1493,7 @@ static int init_eps(struct ci13xxx *udc)
else
udc->ep0in = mEp;
+ mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
continue;
}
Patches currently in stable-queue which might be from
[email protected] are
queue-3.5/usb-chipidea-udc-fix-setup-of-endpoint-maxpacket-size.patch
queue-3.5/usb-chipidea-udc-don-t-stall-endpoint-if-request-list-is-empty-in-isr_tr_complete_low.patch
queue-3.5/usb-chipidea-udc-add-pullup-fuction-needed-by-the-uvc-gadget.patch
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