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usb: gadget: mv_u3d: mv_u3d_start_queue() refactoring

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The patch improves readability of mv_u3d_start_queue()
by rearranging its code with two semantic modifications:
- assignment zero to ep->processing if usb_gadget_map_request() fails;
- propagation of error code from mv_u3d_req_to_trb() instead of
  hardcoded -ENOMEM.

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Alexey Khoroshilov 2016-11-03 16:16:32 +03:00 committed by Felipe Balbi
parent 6ffd65154e
commit dc9ef58884
1 changed files with 15 additions and 13 deletions
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28
drivers/usb/gadget/udc/mv_u3d_core.c
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@ -493,30 +493,32 @@ mv_u3d_start_queue(struct mv_u3d_ep *ep)
ret = usb_gadget_map_request(&u3d->gadget, &req->req,
mv_u3d_ep_dir(ep));
if (ret)
return ret;
goto break_processing;
req->req.status = -EINPROGRESS;
req->req.actual = 0;
req->trb_count = 0;
/* build trbs and push them to device queue */
if (!mv_u3d_req_to_trb(req)) {
ret = mv_u3d_queue_trb(ep, req);
if (ret) {
ep->processing = 0;
return ret;
}
} else {
ep->processing = 0;
/* build trbs */
ret = mv_u3d_req_to_trb(req);
if (ret) {
dev_err(u3d->dev, "%s, mv_u3d_req_to_trb fail\n", __func__);
return -ENOMEM;
goto break_processing;
}
/* and push them to device queue */
ret = mv_u3d_queue_trb(ep, req);
if (ret)
goto break_processing;
/* irq handler advances the queue */
if (req)
list_add_tail(&req->queue, &ep->queue);
list_add_tail(&req->queue, &ep->queue);
return 0;
break_processing:
ep->processing = 0;
return ret;
}
static int mv_u3d_ep_enable(struct usb_ep *_ep,