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usb: dwc3: gadget: return errors from __dwc3_gadget_start_isoc()

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Sometimes, errors happen when kicking transfers from
__dwc3_gadget_start_isoc(). In those cases, we need to pass along the
error so gadget driver can make informed decisions.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2018-08-14 10:41:19 +03:00
parent fec9095bde
commit 25abad6a05
1 changed files with 11 additions and 14 deletions
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25
drivers/usb/dwc3/gadget.c
View file

@ -1308,7 +1308,7 @@ static int __dwc3_gadget_get_frame(struct dwc3 *dwc)
* Synopsys STAR 9001202023: Wrong microframe number for isochronous IN
* endpoints.
*/
static void dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
static int dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
{
int cmd_status = 0;
bool test0;
@ -1338,7 +1338,7 @@ static void dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
if (cmd_status && cmd_status != -EAGAIN) {
dep->start_cmd_status = 0;
dep->combo_num = 0;
return;
return 0;
}
/* Store the first test status */
@ -1353,7 +1353,7 @@ static void dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
*/
if (cmd_status == 0) {
dwc3_stop_active_transfer(dep, true);
return;
return 0;
}
}
@ -1378,10 +1378,10 @@ static void dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
dep->start_cmd_status = 0;
dep->combo_num = 0;
__dwc3_gadget_kick_transfer(dep);
return __dwc3_gadget_kick_transfer(dep);
}
static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep)
static int __dwc3_gadget_start_isoc(struct dwc3_ep *dep)
{
struct dwc3 *dwc = dep->dwc;
@ -1389,7 +1389,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep)
dev_info(dep->dwc->dev, "%s: ran out of requests\n",
dep->name);
dep->flags |= DWC3_EP_PENDING_REQUEST;
return;
return -EAGAIN;
}
if (!dwc->dis_start_transfer_quirk && dwc3_is_usb31(dwc) &&
@ -1398,14 +1398,12 @@ static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep)
dwc->version_type >= DWC31_VERSIONTYPE_EA01 &&
dwc->version_type <= DWC31_VERSIONTYPE_EA06))) {
if (dwc->gadget.speed <= USB_SPEED_HIGH && dep->direction) {
dwc3_gadget_start_isoc_quirk(dep);
return;
}
if (dwc->gadget.speed <= USB_SPEED_HIGH && dep->direction)
return dwc3_gadget_start_isoc_quirk(dep);
}
dep->frame_number = DWC3_ALIGN_FRAME(dep);
__dwc3_gadget_kick_transfer(dep);
return __dwc3_gadget_kick_transfer(dep);
}
static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
@ -1446,8 +1444,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
if ((dep->flags & DWC3_EP_PENDING_REQUEST)) {
if (!(dep->flags & DWC3_EP_TRANSFER_STARTED)) {
__dwc3_gadget_start_isoc(dep);
return 0;
return __dwc3_gadget_start_isoc(dep);
}
}
}
@ -2513,7 +2510,7 @@ static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep,
const struct dwc3_event_depevt *event)
{
dwc3_gadget_endpoint_frame_from_event(dep, event);
__dwc3_gadget_start_isoc(dep);
(void) __dwc3_gadget_start_isoc(dep);
}
static void dwc3_endpoint_interrupt(struct dwc3 *dwc,