From d115d7050a0d2c4967532f18c9cb522fea6b7280 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 31 Aug 2015 19:48:28 +0300 Subject: [PATCH] Revert "usb: dwc3: gadget: drop unnecessary loop when cleaning up TRBs" MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This reverts commit 8f2c9544aba636134303105ecb164190a39dece4. As it breaks g_ether on my Baytrail FFRD8 device. Everything starts out fine, but after a bit of data has been transferred it just stops flowing. Note that I do get a bunch of these "NOHZ: local_softirq_pending 08" when booting the machine, but I'm not really sure if they're related to this problem. Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Ville Syrjälä Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 37 +++++++++++++++++++++---------------- 1 file changed, 21 insertions(+), 16 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 81bfb9ad1e2e..55ba447fdf8b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1884,27 +1884,32 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, unsigned int i; int ret; - req = next_request(&dep->req_queued); - if (!req) { - WARN_ON_ONCE(1); - return 1; - } - i = 0; do { - slot = req->start_slot + i; - if ((slot == DWC3_TRB_NUM - 1) && + req = next_request(&dep->req_queued); + if (!req) { + WARN_ON_ONCE(1); + return 1; + } + i = 0; + do { + slot = req->start_slot + i; + if ((slot == DWC3_TRB_NUM - 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) - slot++; - slot %= DWC3_TRB_NUM; - trb = &dep->trb_pool[slot]; + slot++; + slot %= DWC3_TRB_NUM; + trb = &dep->trb_pool[slot]; + + ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, + event, status); + if (ret) + break; + } while (++i < req->request.num_mapped_sgs); + + dwc3_gadget_giveback(dep, req, status); - ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, - event, status); if (ret) break; - } while (++i < req->request.num_mapped_sgs); - - dwc3_gadget_giveback(dep, req, status); + } while (1); if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && list_empty(&dep->req_queued)) { -- 2.39.5