From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA44A2F37; Tue, 8 Jul 2025 16:54:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751993665; cv=none; b=OWgoYqdkGVmbbJfuhxxxB+nlHok6HQuj2gQSkhSS9LbjPLTWnX1MgLcSjh7RVkX3Kah+bhZ80NZeFljoDfVg36Y2txvW3wKzxEMi/C5f2SYI/8UBU8CgjAPSEqKj9EFyzB+gDmNZJ3dXg+aVVgyLtnGgW37it+MZUeTS0BCgD/c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751993665; c=relaxed/simple; bh=FH3gF+2F0FE6kPtZqlb9qT05ej73G94PvvRvMjHqbOQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=O+65htCrN9kgK4M1W8hivBmm31lzZe6BF/Mz7HfVKNpyS+GpmTW6Ow+Pz2zjm5gYj5uwH+KqHdQggQzItQpIflnVFsNmEXv4zjlz8MFMd5T9GgD3H/3YAndj9Zjq6sK/cbpkCphrTwdPN3oUdpBtd9df5afOH5Bl13N6XMW5s0s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=I9zhc2ax; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="I9zhc2ax" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73F8BC4CEED; Tue, 8 Jul 2025 16:54:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751993664; bh=FH3gF+2F0FE6kPtZqlb9qT05ej73G94PvvRvMjHqbOQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I9zhc2axbO7YkP/WqD4HJ/xKS4YN41hTQfI26QSjqmO5HrJO22q02NnBrFtruwaV9 3/FscXCWbv2CGuVYvoyLvi2OuXEMUg1bJU3MhXqInEln5Nnv0gP6f9YletTwEP+ku1 APV6WH0plFC16dLA4VucYBd1XcJNGDXbYW4RX49I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Thinh Nguyen , Kuen-Han Tsai Subject: [PATCH 6.15 152/178] usb: dwc3: Abort suspend on soft disconnect failure Date: Tue, 8 Jul 2025 18:23:09 +0200 Message-ID: <20250708162240.478983015@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250708162236.549307806@linuxfoundation.org> References: <20250708162236.549307806@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kuen-Han Tsai commit 630a1dec3b0eba2a695b9063f1c205d585cbfec9 upstream. When dwc3_gadget_soft_disconnect() fails, dwc3_suspend_common() keeps going with the suspend, resulting in a period where the power domain is off, but the gadget driver remains connected. Within this time frame, invoking vbus_event_work() will cause an error as it attempts to access DWC3 registers for endpoint disabling after the power domain has been completely shut down. Abort the suspend sequence when dwc3_gadget_suspend() cannot halt the controller and proceeds with a soft connect. Fixes: 9f8a67b65a49 ("usb: dwc3: gadget: fix gadget suspend/resume") Cc: stable Acked-by: Thinh Nguyen Signed-off-by: Kuen-Han Tsai Link: https://lore.kernel.org/r/20250528100315.2162699-1-khtsai@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/core.c | 9 +++++++-- drivers/usb/dwc3/gadget.c | 22 +++++++++------------- 2 files changed, 16 insertions(+), 15 deletions(-) --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -2388,6 +2388,7 @@ static int dwc3_suspend_common(struct dw { u32 reg; int i; + int ret; if (!pm_runtime_suspended(dwc->dev) && !PMSG_IS_AUTO(msg)) { dwc->susphy_state = (dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)) & @@ -2406,7 +2407,9 @@ static int dwc3_suspend_common(struct dw case DWC3_GCTL_PRTCAP_DEVICE: if (pm_runtime_suspended(dwc->dev)) break; - dwc3_gadget_suspend(dwc); + ret = dwc3_gadget_suspend(dwc); + if (ret) + return ret; synchronize_irq(dwc->irq_gadget); dwc3_core_exit(dwc); break; @@ -2441,7 +2444,9 @@ static int dwc3_suspend_common(struct dw break; if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) { - dwc3_gadget_suspend(dwc); + ret = dwc3_gadget_suspend(dwc); + if (ret) + return ret; synchronize_irq(dwc->irq_gadget); } --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4821,26 +4821,22 @@ int dwc3_gadget_suspend(struct dwc3 *dwc int ret; ret = dwc3_gadget_soft_disconnect(dwc); - if (ret) - goto err; - - spin_lock_irqsave(&dwc->lock, flags); - if (dwc->gadget_driver) - dwc3_disconnect_gadget(dwc); - spin_unlock_irqrestore(&dwc->lock, flags); - - return 0; - -err: /* * Attempt to reset the controller's state. Likely no * communication can be established until the host * performs a port reset. */ - if (dwc->softconnect) + if (ret && dwc->softconnect) { dwc3_gadget_soft_connect(dwc); + return -EAGAIN; + } - return ret; + spin_lock_irqsave(&dwc->lock, flags); + if (dwc->gadget_driver) + dwc3_disconnect_gadget(dwc); + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; } int dwc3_gadget_resume(struct dwc3 *dwc)