From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0582DC28D17 for ; Mon, 15 Nov 2021 20:45:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3FB963275 for ; Mon, 15 Nov 2021 20:45:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352429AbhKOUpq (ORCPT ); Mon, 15 Nov 2021 15:45:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:50072 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240312AbhKOSHd (ORCPT ); Mon, 15 Nov 2021 13:07:33 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8F24763305; Mon, 15 Nov 2021 17:44:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636998270; bh=dEGP4LITW/muASRlsEeWsHD5e9oeK2uLVaypXlduXBU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=myJ/ngPy3d26quw+OqDjX34u149+hbz7btEVwvLowXhOa4AvCExg7mVYZUoDKjs0z 91n1vg9axbjh8jK+1jx4iW7nEsLfzfRoS444vp4gcT3fwMlTcf+7cyht3YRgSB8Id6 aJfQ1wBhZN2wuC5JMotVJuRZBJm5W/ZWNe//mjMQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Minas Harutyunyan , Amelie Delaunay , Sasha Levin Subject: [PATCH 5.10 449/575] usb: dwc2: drd: reset current session before setting the new one Date: Mon, 15 Nov 2021 18:02:54 +0100 Message-Id: <20211115165359.277494223@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165343.579890274@linuxfoundation.org> References: <20211115165343.579890274@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Amelie Delaunay [ Upstream commit 1ad707f559f7cb12c64f3d7cb37f0b1ea27c1058 ] If role is changed without the "none" step, A- and B- valid session could be set at the same time. It is an issue. This patch resets A-session if role switch sets B-session, and resets B-session if role switch sets A-session. Then, it is possible to change the role without the "none" step. Fixes: 17f934024e84 ("usb: dwc2: override PHY input signals with usb role switch support") Acked-by: Minas Harutyunyan Signed-off-by: Amelie Delaunay Link: https://lore.kernel.org/r/20211005095305.66397-4-amelie.delaunay@foss.st.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/dwc2/drd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/dwc2/drd.c b/drivers/usb/dwc2/drd.c index 99672360f34b0..aa6eb76f64ddc 100644 --- a/drivers/usb/dwc2/drd.c +++ b/drivers/usb/dwc2/drd.c @@ -40,6 +40,7 @@ static int dwc2_ovr_avalid(struct dwc2_hsotg *hsotg, bool valid) (!valid && !(gotgctl & GOTGCTL_ASESVLD))) return -EALREADY; + gotgctl &= ~GOTGCTL_BVALOVAL; if (valid) gotgctl |= GOTGCTL_AVALOVAL | GOTGCTL_VBVALOVAL; else @@ -58,6 +59,7 @@ static int dwc2_ovr_bvalid(struct dwc2_hsotg *hsotg, bool valid) (!valid && !(gotgctl & GOTGCTL_BSESVLD))) return -EALREADY; + gotgctl &= ~GOTGCTL_AVALOVAL; if (valid) gotgctl |= GOTGCTL_BVALOVAL | GOTGCTL_VBVALOVAL; else -- 2.33.0