From patchwork Thu Aug 30 10:54:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eugeniu Rosca X-Patchwork-Id: 10581483 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4AE9F139B for ; Thu, 30 Aug 2018 10:54:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3CAA42B75F for ; Thu, 30 Aug 2018 10:54:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 311042B776; Thu, 30 Aug 2018 10:54:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CDE8F2B75F for ; Thu, 30 Aug 2018 10:54:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728446AbeH3O42 (ORCPT ); Thu, 30 Aug 2018 10:56:28 -0400 Received: from smtp1.de.adit-jv.com ([62.225.105.245]:44777 "EHLO smtp1.de.adit-jv.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728087AbeH3O42 (ORCPT ); Thu, 30 Aug 2018 10:56:28 -0400 Received: from localhost (smtp1.de.adit-jv.com [127.0.0.1]) by smtp1.de.adit-jv.com (Postfix) with ESMTP id 683B23C09AC; Thu, 30 Aug 2018 12:54:51 +0200 (CEST) Received: from smtp1.de.adit-jv.com ([127.0.0.1]) by localhost (smtp1.de.adit-jv.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vDfN3BbrTkqS; Thu, 30 Aug 2018 12:54:43 +0200 (CEST) Received: from HI2EXCH01.adit-jv.com (hi2exch01.adit-jv.com [10.72.92.24]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp1.de.adit-jv.com (Postfix) with ESMTPS id 4111B3C09AF; Thu, 30 Aug 2018 12:54:43 +0200 (CEST) Received: from vmlxhi-102.adit-jv.com (10.72.93.184) by HI2EXCH01.adit-jv.com (10.72.92.24) with Microsoft SMTP Server (TLS) id 14.3.399.0; Thu, 30 Aug 2018 12:54:42 +0200 From: Eugeniu Rosca To: Kuninori Morimoto , Yoshihiro Shimoda , Felipe Balbi , Vladimir Zapolskiy , Johan Hovold , Greg Kroah-Hartman CC: , , Veeraiyan Chidambaram , Eugeniu Rosca , Eugeniu Rosca Subject: [PATCH 2/3] usb: renesas_usbhs: enable DVSE interrupt Date: Thu, 30 Aug 2018 12:54:02 +0200 Message-ID: <20180830105403.17964-2-erosca@de.adit-jv.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180830105403.17964-1-erosca@de.adit-jv.com> References: <20180830105403.17964-1-erosca@de.adit-jv.com> MIME-Version: 1.0 X-Originating-IP: [10.72.93.184] Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Commit [1] enabled the possibility of checking the DVST (Device State Transition) bit of INTSTS0 (Interrupt Status Register 0) and calling the irq_dev_state() handler if the DVST bit is set. But neither commit [1] nor commit [2] actually enabled the DVSE (Device State Transition Interrupt Enable) bit in the INTENB0 (Interrupt Enable Register 0). As a consequence, irq_dev_state() handler is getting called as a side effect of other (non-DVSE) interrupts being fired, which definitely can't be relied upon, if DVST notifications are of any value. Why this doesn't hurt is because usbhsg_irq_dev_state() currently doesn't do much except of a dev_dbg(). Once more work is added to the handler (e.g. detecting device "Suspended" state and notifying other USB gadget components about it), enabling DVSE becomes a hard requirement. Do it in a standalone commit for better visibility and clear explanation. [1] f1407d5c6624 ("usb: renesas_usbhs: Add Renesas USBHS common code") [2] 2f98382dcdfe ("usb: renesas_usbhs: Add Renesas USBHS Gadget") Signed-off-by: Eugeniu Rosca Reviewed-by: Yoshihiro Shimoda --- drivers/usb/renesas_usbhs/mod.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c index 585568279174..a8ed3c7e19ca 100644 --- a/drivers/usb/renesas_usbhs/mod.c +++ b/drivers/usb/renesas_usbhs/mod.c @@ -348,10 +348,6 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) * usbhs_interrupt */ - /* - * it don't enable DVSE (intenb0) here - * but "mod->irq_dev_state" will be called. - */ if (info->irq_vbus) intenb0 |= VBSE; @@ -362,6 +358,9 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) if (mod->irq_ctrl_stage) intenb0 |= CTRE; + if (mod->irq_dev_state) + intenb0 |= DVSE; + if (mod->irq_empty && mod->irq_bempsts) { usbhs_write(priv, BEMPENB, mod->irq_bempsts); intenb0 |= BEMPE;