From: Minas Harutyunyan Minas.Harutyunyan@synopsys.com
commit 7ad4a0b1d46b2612f4429a72afd8f137d7efa9a9 upstream.
Added updating of request frame number for elapsed frames, otherwise frame number will remain as previous use of request. This will allow function driver to correctly track frames in case of Missed ISOC occurs.
Added setting request actual length to 0 for elapsed frames. In Slave mode when pushing data to RxFIFO by dwords, request actual length incrementing accordingly. But before whole packet will be pushed into RxFIFO and send to host can occurs Missed ISOC and data will not send to host. So, in this case request actual length should be reset to 0.
Fixes: 91bb163e1e4f ("usb: dwc2: gadget: Fix ISOC flow for BDMA and Slave") Cc: stable stable@vger.kernel.org Reviewed-by: John Keeping john@metanate.com Signed-off-by: Minas Harutyunyan Minas.Harutyunyan@synopsys.com Link: https://lore.kernel.org/r/c356baade6e9716d312d43df08d53ae557cb8037.163601127... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc2/gadget.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
--- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1198,6 +1198,8 @@ static void dwc2_hsotg_start_req(struct } ctrl |= DXEPCTL_CNAK; } else { + hs_req->req.frame_number = hs_ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); return; } @@ -2856,9 +2858,12 @@ static void dwc2_gadget_handle_ep_disabl
do { hs_req = get_ep_head(hs_ep); - if (hs_req) + if (hs_req) { + hs_req->req.frame_number = hs_ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); + } dwc2_gadget_incr_frame_num(hs_ep); /* Update current frame number value. */ hsotg->frame_number = dwc2_hsotg_read_frameno(hsotg); @@ -2911,8 +2916,11 @@ static void dwc2_gadget_handle_out_token
while (dwc2_gadget_target_frame_elapsed(ep)) { hs_req = get_ep_head(ep); - if (hs_req) + if (hs_req) { + hs_req->req.frame_number = ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, ep, hs_req, -ENODATA); + }
dwc2_gadget_incr_frame_num(ep); /* Update current frame number value. */ @@ -3001,8 +3009,11 @@ static void dwc2_gadget_handle_nak(struc
while (dwc2_gadget_target_frame_elapsed(hs_ep)) { hs_req = get_ep_head(hs_ep); - if (hs_req) + if (hs_req) { + hs_req->req.frame_number = hs_ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); + }
dwc2_gadget_incr_frame_num(hs_ep); /* Update current frame number value. */