From 8c7d4b7b3d43c54c0b8c1e4adb917a151c754196 Mon Sep 17 00:00:00 2001 From: Tejas Joglekar Date: Wed, 13 Nov 2019 11:45:16 +0530 Subject: usb: dwc3: gadget: Fix logical condition This patch corrects the condition to kick the transfer without giving back the requests when either request has remaining data or when there are pending SGs. The && check was introduced during spliting up the dwc3_gadget_ep_cleanup_completed_requests() function. Fixes: f38e35dd84e2 ("usb: dwc3: gadget: split dwc3_gadget_ep_cleanup_completed_requests()") Cc: stable@vger.kernel.org Signed-off-by: Tejas Joglekar Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a9aba716bf80..6ff6ee4fe5aa 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2491,7 +2491,7 @@ static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep, req->request.actual = req->request.length - req->remaining; - if (!dwc3_gadget_ep_request_completed(req) && + if (!dwc3_gadget_ep_request_completed(req) || req->num_pending_sgs) { __dwc3_gadget_kick_transfer(dep); goto out; -- cgit From d3abda5a98a18e524e17fd4085c9f4bd53e9ef53 Mon Sep 17 00:00:00 2001 From: Thinh Nguyen Date: Wed, 27 Nov 2019 13:10:47 -0800 Subject: usb: dwc3: gadget: Clear started flag for non-IOC Normally the END_TRANSFER command completion handler will clear the DWC3_EP_TRANSFER_STARTED flag. However, if the command was sent without interrupt on completion, then the flag will not be cleared. Make sure to clear the flag in this case. Cc: stable@vger.kernel.org Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6ff6ee4fe5aa..0c960a97ea02 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2719,6 +2719,9 @@ static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force, WARN_ON_ONCE(ret); dep->resource_index = 0; + if (!interrupt) + dep->flags &= ~DWC3_EP_TRANSFER_STARTED; + if (dwc3_is_usb31(dwc) || dwc->revision < DWC3_REVISION_310A) udelay(100); } -- cgit From 2d7b78f59e020b07fc6338eefe286f54ee2d6773 Mon Sep 17 00:00:00 2001 From: Thinh Nguyen Date: Wed, 27 Nov 2019 13:10:54 -0800 Subject: usb: dwc3: ep0: Clear started flag on completion Clear ep0's DWC3_EP_TRANSFER_STARTED flag if the END_TRANSFER command is completed. Otherwise, we can't start control transfer again after END_TRANSFER. Cc: stable@vger.kernel.org Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/ep0.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 3996b9c4ff8d..fd1b100d2927 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -1117,6 +1117,9 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc, void dwc3_ep0_interrupt(struct dwc3 *dwc, const struct dwc3_event_depevt *event) { + struct dwc3_ep *dep = dwc->eps[event->endpoint_number]; + u8 cmd; + switch (event->endpoint_event) { case DWC3_DEPEVT_XFERCOMPLETE: dwc3_ep0_xfer_complete(dwc, event); @@ -1129,7 +1132,12 @@ void dwc3_ep0_interrupt(struct dwc3 *dwc, case DWC3_DEPEVT_XFERINPROGRESS: case DWC3_DEPEVT_RXTXFIFOEVT: case DWC3_DEPEVT_STREAMEVT: + break; case DWC3_DEPEVT_EPCMDCMPLT: + cmd = DEPEVT_PARAMETER_CMD(event->parameters); + + if (cmd == DWC3_DEPCMD_ENDTRANSFER) + dep->flags &= ~DWC3_EP_TRANSFER_STARTED; break; } } -- cgit From e5b5da96da50ef30abb39cb9f694e99366404d24 Mon Sep 17 00:00:00 2001 From: EJ Hsu Date: Tue, 3 Dec 2019 23:34:56 -0800 Subject: usb: gadget: fix wrong endpoint desc Gadget driver should always use config_ep_by_speed() to initialize usb_ep struct according to usb device's operating speed. Otherwise, usb_ep struct may be wrong if usb devcie's operating speed is changed. The key point in this patch is that we want to make sure the desc pointer in usb_ep struct will be set to NULL when gadget is disconnected. This will force it to call config_ep_by_speed() to correctly initialize usb_ep struct based on the new operating speed when gadget is re-connected later. Reviewed-by: Peter Chen Signed-off-by: EJ Hsu Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_ecm.c | 6 +++++- drivers/usb/gadget/function/f_rndis.c | 1 + 2 files changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c index 6ce044008cf6..460d5d7c984f 100644 --- a/drivers/usb/gadget/function/f_ecm.c +++ b/drivers/usb/gadget/function/f_ecm.c @@ -621,8 +621,12 @@ static void ecm_disable(struct usb_function *f) DBG(cdev, "ecm deactivated\n"); - if (ecm->port.in_ep->enabled) + if (ecm->port.in_ep->enabled) { gether_disconnect(&ecm->port); + } else { + ecm->port.in_ep->desc = NULL; + ecm->port.out_ep->desc = NULL; + } usb_ep_disable(ecm->notify); ecm->notify->desc = NULL; diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c index d48df36622b7..0d8e4a364ca6 100644 --- a/drivers/usb/gadget/function/f_rndis.c +++ b/drivers/usb/gadget/function/f_rndis.c @@ -618,6 +618,7 @@ static void rndis_disable(struct usb_function *f) gether_disconnect(&rndis->port); usb_ep_disable(rndis->notify); + rndis->notify->desc = NULL; } /*-------------------------------------------------------------------------*/ -- cgit