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 7A79E359FBE; Fri, 9 Jan 2026 12:08:56 +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=1767960536; cv=none; b=o8dB9bbwO3HnXIXbgJBwBz1X16SEs8dk6BtWEDuA7voPhHIQcsttpomOAsUSxuHHgFZg5b6Y6n8QpMjAdkMzgHMbw6FOBj81r07boD/063V+snNUNXxqnjsgLQHYihYvYUUD1w4YXEg1+k3u47TYnUllXCyo/nVhJhl74HrdGTI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767960536; c=relaxed/simple; bh=CHFBoOUwdEMK6vRatCMLy+q5iHu07JFkn97DNw+RuN8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pmzOPhB10qACjHFlnh50INjXmaK3LMJJwoAbRlJaPCgLy8z4pd3AmJYzvl/5XxYsLNGvja/ZikWFs0Hl0JGkx9/lR3SLOkUyZtvB7uTtAbIVdrAcUmnMx8Vw1PI7q19bLS4ynj8aS6tgYqPYuxIruzCFENVbmTtgkELt86GVMd0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IQ/bvDjg; 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="IQ/bvDjg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07BE1C16AAE; Fri, 9 Jan 2026 12:08:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767960536; bh=CHFBoOUwdEMK6vRatCMLy+q5iHu07JFkn97DNw+RuN8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IQ/bvDjg3sUzO7GNn5dO7oey7dJK+DLgE/aE+sSWe3iket+VhMmNkRonnCUbHfq3A OpPtymKLH6Wg+ysDwmx14cKPX2Jma+jJcrgZXRrJA036Ega9hJgI6PlqQ17j5sFBlL 5bV3KZm1ekUXChlnu0aJhE5RBs0TcNPBdxrpSYgg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Thinh Nguyen , Udipto Goswami Subject: [PATCH 6.6 439/737] usb: dwc3: keep susphy enabled during exit to avoid controller faults Date: Fri, 9 Jan 2026 12:39:38 +0100 Message-ID: <20260109112150.505078585@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@linuxfoundation.org> User-Agent: quilt/0.69 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Udipto Goswami commit e1003aa7ec9eccdde4c926bd64ef42816ad55f25 upstream. On some platforms, switching USB roles from host to device can trigger controller faults due to premature PHY power-down. This occurs when the PHY is disabled too early during teardown, causing synchronization issues between the PHY and controller. Keep susphy enabled during dwc3_host_exit() and dwc3_gadget_exit() ensures the PHY remains in a low-power state capable of handling required commands during role switch. Cc: stable Fixes: 6d735722063a ("usb: dwc3: core: Prevent phy suspend during init") Suggested-by: Thinh Nguyen Signed-off-by: Udipto Goswami Acked-by: Thinh Nguyen Link: https://patch.msgid.link/20251126054221.120638-1-udipto.goswami@oss.qualcomm.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 2 +- drivers/usb/dwc3/host.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4807,7 +4807,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc) if (!dwc->gadget) return; - dwc3_enable_susphy(dwc, false); + dwc3_enable_susphy(dwc, true); usb_del_gadget(dwc->gadget); dwc3_gadget_free_endpoints(dwc); usb_put_gadget(dwc->gadget); --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -168,7 +168,7 @@ void dwc3_host_exit(struct dwc3 *dwc) if (dwc->sys_wakeup) device_init_wakeup(&dwc->xhci->dev, false); - dwc3_enable_susphy(dwc, false); + dwc3_enable_susphy(dwc, true); platform_device_unregister(dwc->xhci); dwc->xhci = NULL; }