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UPSTREAM: usb: dwc3: fix for the isoc transfer EP_BUSY flag

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commit f3af36511e ("usb: dwc3: gadget: always
enable IOC on bulk/interrupt transfers") ended up
regressing Isochronous endpoints by clearing
DWC3_EP_BUSY flag too early, which resulted in
choppy audio playback over USB.

Fix that by partially reverting original commit and
making sure that we check for isochronous endpoints.

Change-Id: If2b5897f005bc5f6a4f475e8371c2654ac04a44a
Fixes: f3af36511e ("usb: dwc3: gadget: always enable IOC
		on bulk/interrupt transfers")
Cc: <stable@vger.kernel.org>
Signed-off-by: Konrad Leszczynski <konrad.leszczynski@intel.com>
Signed-off-by: Rafal Redzimski <rafal.f.redzimski@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
(cherry picked from commit 9cad39fe4e)
This commit is contained in:
Konrad Leszczynski
2016-02-08 16:13:12 +01:00
committed by Huang, Tao
parent d416462a61
commit fda77e79d7
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/dwc3/gadget.c
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@@ -2062,6 +2062,10 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
return 1;
}
if (usb_endpoint_xfer_isoc(dep->endpoint.desc))
if ((event->status & DEPEVT_STATUS_IOC) &&
(trb->ctrl & DWC3_TRB_CTRL_IOC))
return 0;
return 1;
}