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usb: gadget: ci_udc: implement usb_ep_ops dequeue callback

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Implement endpoint dequeue callback function.

Without this function, uboot will hang when executing fastboot comamnd.
See following flow:
"fastboot_tx_write_str->fastboot_tx_write->usb_ep_dequeue->ep->ops->dequeue"
without implement ci_udc dequeue function, ep->ops->dequeue is NULL, then
uboot will hang.

Tested on mx6qsabresd board with fastboot enabled.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
Cc: "Łukasz Majewski" <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>
This commit is contained in:
Peng Fan
2015-08-28 09:20:30 +08:00
committed by Marek Vasut
parent 89983478bd
commit 70eaeb03c1
1 changed files with 26 additions and 0 deletions
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26
drivers/usb/gadget/ci_udc.c
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@@ -87,6 +87,7 @@ static int ci_ep_enable(struct usb_ep *ep,
static int ci_ep_disable(struct usb_ep *ep); static int ci_ep_disable(struct usb_ep *ep);
static int ci_ep_queue(struct usb_ep *ep, static int ci_ep_queue(struct usb_ep *ep,
struct usb_request *req, gfp_t gfp_flags); struct usb_request *req, gfp_t gfp_flags);
static int ci_ep_dequeue(struct usb_ep *ep, struct usb_request *req);
static struct usb_request * static struct usb_request *
ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags); ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags);
static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *_req); static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *_req);
@@ -99,6 +100,7 @@ static struct usb_ep_ops ci_ep_ops = {
.enable = ci_ep_enable, .enable = ci_ep_enable,
.disable = ci_ep_disable, .disable = ci_ep_disable,
.queue = ci_ep_queue, .queue = ci_ep_queue,
.dequeue = ci_ep_dequeue,
.alloc_request = ci_ep_alloc_request, .alloc_request = ci_ep_alloc_request,
.free_request = ci_ep_free_request, .free_request = ci_ep_free_request,
}; };
@@ -525,6 +527,30 @@ static void ci_ep_submit_next_request(struct ci_ep *ci_ep)
writel(bit, &udc->epprime); writel(bit, &udc->epprime);
} }
static int ci_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct ci_ep *ci_ep = container_of(_ep, struct ci_ep, ep);
struct ci_req *ci_req;
list_for_each_entry(ci_req, &ci_ep->queue, queue) {
if (&ci_req->req == _req)
break;
}
if (&ci_req->req != _req)
return -EINVAL;
list_del_init(&ci_req->queue);
if (ci_req->req.status == -EINPROGRESS) {
ci_req->req.status = -ECONNRESET;
if (ci_req->req.complete)
ci_req->req.complete(_ep, _req);
}
return 0;
}
static int ci_ep_queue(struct usb_ep *ep, static int ci_ep_queue(struct usb_ep *ep,
struct usb_request *req, gfp_t gfp_flags) struct usb_request *req, gfp_t gfp_flags)
{ {