From: Konrad Leszczynski <konrad.leszczyn...@intel.com>
commit f3af36511e60 ("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.
Fixes: f3af36511e60 ("usb: dwc3: gadget: always enable IOC
on bulk/interrupt transfers")
Cc: <sta...@vger.kernel.org>
Signed-off-by: Konrad Leszczynski <konrad.leszczyn...@intel.com>
Signed-off-by: Rafal Redzimski <rafal.f.redzim...@intel.com>
Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
---
drivers/usb/dwc3/gadget.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 68d13f107b2f..8c06b8d64144 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2032,6 +2032,10 @@ 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;
}
--
2.8.2
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