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usb: dwc3: gadget: always unmap EP0 requests

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commit 0416e494ce ("usb: dwc3: ep0: correct cache
sync issue in case of ep0_bounced") introduced a bug
where we would leak DMA resources which would cause
us to starve the system of them resulting in failing
DMA transfers.

Fix the bug by making sure that we always unmap EP0
requests since those are *always* mapped.

Fixes: 0416e494ce ("usb: dwc3: ep0: correct cache
	sync issue in case of ep0_bounced")
Cc: <stable@vger.kernel.org>
Tested-by: Tomasz Medrek <tomaszx.medrek@intel.com>
Reported-by: Janusz Dziedzic <januszx.dziedzic@linux.intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi
2016-12-20 14:14:40 +02:00
parent 19ec31230e
commit d621459299
1 changed files with 4 additions and 4 deletions
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8
drivers/usb/dwc3/gadget.c
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@@ -180,11 +180,11 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
if (req->request.status == -EINPROGRESS)
req->request.status = status;
if (dwc->ep0_bounced && dep->number == 0)
if (dwc->ep0_bounced && dep->number <= 1)
dwc->ep0_bounced = false;
else
usb_gadget_unmap_request_by_dev(dwc->sysdev,
&req->request, req->direction);
usb_gadget_unmap_request_by_dev(dwc->sysdev,
&req->request, req->direction);
trace_dwc3_gadget_giveback(req);