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usbip: vudc: fix: Clear already_seen flag also for ep0

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commit 3e448e13a6 upstream.

ep_list inside gadget structure doesn't contain ep0.
It is stored separately in ep0 field.

This causes an urb hang if gadget driver decides to
delay setup handling. On host side this is visible as
timeout error when setting configuration.

This bug can be reproduced using for example any gadget
with mass storage function.

Fixes: abdb295743 ("usbip: vudc: Add vudc_transfer")
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Opasiak
2016-12-01 19:14:37 +01:00
committed by Greg Kroah-Hartman
parent 420f170ce1
commit 77bd73ce21
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/usbip/vudc_transfer.c
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@@ -339,6 +339,8 @@ static void v_timer(unsigned long _vudc)
total = timer->frame_limit;
}
/* We have to clear ep0 flags separately as it's not on the list */
udc->ep[0].already_seen = 0;
list_for_each_entry(_ep, &udc->gadget.ep_list, ep_list) {
ep = to_vep(_ep);
ep->already_seen = 0;