From patchwork Thu Apr 1 13:11:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kepplinger X-Patchwork-Id: 414815 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 153CAC433ED for ; Thu, 1 Apr 2021 18:03:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D787861206 for ; Thu, 1 Apr 2021 18:03:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237412AbhDASDm (ORCPT ); Thu, 1 Apr 2021 14:03:42 -0400 Received: from comms.puri.sm ([159.203.221.185]:57236 "EHLO comms.puri.sm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237028AbhDAR7V (ORCPT ); Thu, 1 Apr 2021 13:59:21 -0400 Received: from localhost (localhost [127.0.0.1]) by comms.puri.sm (Postfix) with ESMTP id B934CDF33F; Thu, 1 Apr 2021 06:11:26 -0700 (PDT) Received: from comms.puri.sm ([127.0.0.1]) by localhost (comms.puri.sm [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DHkhq2-1mdZF; Thu, 1 Apr 2021 06:11:24 -0700 (PDT) From: Martin Kepplinger To: gregkh@linuxfoundation.org, balbi@kernel.org Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux-usb@vger.kernel.org, wcheng@codeaurora.org, Martin Kepplinger Subject: [PATCH v2] Revert "usb: dwc3: gadget: Prevent EP queuing while stopping transfers" Date: Thu, 1 Apr 2021 15:11:08 +0200 Message-Id: <20210401131108.2149766-1-martin.kepplinger@puri.sm> In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org commit 9de499997c ("usb: dwc3: gadget: Prevent EP queuing while stopping transfers") results in the below error every time I connect the type-c connector to the dwc3, configured with serial and ethernet gadgets. I also apply the following to dwc3 on this port: dr_mode = "otg"; snps,dis_u3_susphy_quirk; hnp-disable; srp-disable; adp-disable; usb-role-switch; [ 51.148220] ------------[ cut here ]------------ [ 51.148241] dwc3 38100000.usb: No resource for ep2in [ 51.148376] WARNING: CPU: 0 PID: 299 at drivers/usb/dwc3/gadget.c:360 dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3] [ 51.148837] CPU: 0 PID: 299 Comm: irq/64-dwc3 Not tainted 5.11.11-librem5-00334-ge4c4ff3624e9 #218 [ 51.148848] Hardware name: Purism Librem 5r4 (DT) [ 51.148854] pstate: 60000085 (nZCv daIf -PAN -UAO -TCO BTYPE=--) [ 51.148863] pc : dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3] [ 51.148894] lr : dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3] [ 51.148924] sp : ffff800011cb3ac0 [ 51.148929] x29: ffff800011cb3ac0 x28: ffff0000032a7b00 [ 51.148942] x27: ffff00000327da00 x26: 0000000000000000 [ 51.148954] x25: 00000000ffffffea x24: 0000000000000006 [ 51.148967] x23: ffff0000bee1c080 x22: ffff800011cb3b7c [ 51.148979] x21: 0000000000000406 x20: ffff0000bf170000 [ 51.148992] x19: 0000000000000001 x18: 0000000000000000 [ 51.149004] x17: 0000000000000000 x16: 0000000000000000 [ 51.149016] x15: 0000000000000000 x14: ffff8000114512c0 [ 51.149028] x13: 0000000000001698 x12: 0000000000000040 [ 51.149040] x11: ffff80001151a6f8 x10: 00000000ffffe000 [ 51.149052] x9 : ffff8000100b2b7c x8 : ffff80001146a6f8 [ 51.149065] x7 : ffff80001151a6f8 x6 : 0000000000000000 [ 51.149077] x5 : ffff0000bf939948 x4 : 0000000000000000 [ 51.149089] x3 : 0000000000000027 x2 : 0000000000000000 [ 51.149101] x1 : 0000000000000000 x0 : ffff0000049ae040 [ 51.149114] Call trace: [ 51.149120] dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3] [ 51.149150] __dwc3_gadget_ep_enable+0x288/0x4fc [dwc3] [ 51.149179] dwc3_gadget_ep_enable+0x6c/0x15c [dwc3] [ 51.149209] usb_ep_enable+0x48/0x110 [udc_core] [ 51.149251] rndis_set_alt+0x138/0x1c0 [usb_f_rndis] [ 51.149276] composite_setup+0x674/0x194c [libcomposite] [ 51.149314] dwc3_ep0_interrupt+0x9c4/0xb9c [dwc3] [ 51.149344] dwc3_thread_interrupt+0x8bc/0xe74 [dwc3] [ 51.149374] irq_thread_fn+0x38/0xb0 [ 51.149388] irq_thread+0x170/0x294 [ 51.149397] kthread+0x164/0x16c [ 51.149407] ret_from_fork+0x10/0x34 [ 51.149419] ---[ end trace 62c6cc2ebfb18047 ]--- Linus' tree isn't affected. Revert the change. Signed-off-by: Martin Kepplinger --- drivers/usb/dwc3/gadget.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2a86ad4b12b3..ef8ecaf8655a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -783,6 +783,8 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) trace_dwc3_gadget_ep_disable(dep); + dwc3_remove_requests(dwc, dep); + /* make sure HW endpoint isn't stalled */ if (dep->flags & DWC3_EP_STALL) __dwc3_gadget_ep_set_halt(dep, 0, false); @@ -801,8 +803,6 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) dep->endpoint.desc = NULL; } - dwc3_remove_requests(dwc, dep); - return 0; } @@ -1617,7 +1617,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) { struct dwc3 *dwc = dep->dwc; - if (!dep->endpoint.desc || !dwc->pullups_connected || !dwc->connected) { + if (!dep->endpoint.desc || !dwc->pullups_connected) { dev_err(dwc->dev, "%s: can't queue to disabled endpoint\n", dep->name); return -ESHUTDOWN; @@ -2150,7 +2150,6 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) if (!is_on) { u32 count; - dwc->connected = false; /* * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a * Section 4.1.8 Table 4-7, it states that for a device-initiated @@ -2175,6 +2174,7 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) dwc->ev_buf->lpos = (dwc->ev_buf->lpos + count) % dwc->ev_buf->length; } + dwc->connected = false; } else { __dwc3_gadget_start(dwc); } @@ -3267,6 +3267,8 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) { u32 reg; + dwc->connected = true; + /* * WORKAROUND: DWC3 revisions <1.88a have an issue which * would cause a missing Disconnect Event if there's a @@ -3306,7 +3308,6 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) * transfers." */ dwc3_stop_active_transfers(dwc); - dwc->connected = true; reg = dwc3_readl(dwc->regs, DWC3_DCTL); reg &= ~DWC3_DCTL_TSTCTRL_MASK;