From: Minas Harutyunyan Minas.Harutyunyan@synopsys.com
commit dbe2518b2d8eabffa74dbf7d9fdd7dacddab7fc0 upstream.
When last descriptor in a descriptor list completed with XferComplete interrupt, core switching to handle next descriptor and assert BNA interrupt. Both these interrupts are set while dwc2_hsotg_epint() handler called. Each interrupt should be handled separately: first XferComplete interrupt then BNA interrupt, otherwise last completed transfer will not be giveback to function driver as completed request.
Fixes: 729cac693eec ("usb: dwc2: Change ISOC DDMA flow") Cc: stable stable@vger.kernel.org Signed-off-by: Minas Harutyunyan Minas.Harutyunyan@synopsys.com Link: https://lore.kernel.org/r/a36981accc26cd674c5d8f8da6164344b94ec1fe.163138653... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc2/gadget.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3067,9 +3067,7 @@ static void dwc2_hsotg_epint(struct dwc2
/* In DDMA handle isochronous requests separately */ if (using_desc_dma(hsotg) && hs_ep->isochronous) { - /* XferCompl set along with BNA */ - if (!(ints & DXEPINT_BNAINTR)) - dwc2_gadget_complete_isoc_request_ddma(hs_ep); + dwc2_gadget_complete_isoc_request_ddma(hs_ep); } else if (dir_in) { /* * We get OutDone from the FIFO, so we only