From patchwork Mon Sep 9 15:46:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: veeraiyan chidambaram X-Patchwork-Id: 11138197 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 31F9014ED for ; Mon, 9 Sep 2019 15:46:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 191752082C for ; Mon, 9 Sep 2019 15:46:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388835AbfIIPq0 (ORCPT ); Mon, 9 Sep 2019 11:46:26 -0400 Received: from smtp1.de.adit-jv.com ([93.241.18.167]:57905 "EHLO smtp1.de.adit-jv.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729418AbfIIPq0 (ORCPT ); Mon, 9 Sep 2019 11:46:26 -0400 Received: from localhost (smtp1.de.adit-jv.com [127.0.0.1]) by smtp1.de.adit-jv.com (Postfix) with ESMTP id D3FE13C0579; Mon, 9 Sep 2019 17:46:23 +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 Or0c0dXY5CWV; Mon, 9 Sep 2019 17:46:17 +0200 (CEST) Received: from HI2EXCH01.adit-jv.com (hi2exch01.adit-jv.com [10.72.92.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by smtp1.de.adit-jv.com (Postfix) with ESMTPS id E3B073C0016; Mon, 9 Sep 2019 17:46:17 +0200 (CEST) Received: from vmlxhi-070.adit-jv.com (10.72.93.148) by HI2EXCH01.adit-jv.com (10.72.92.24) with Microsoft SMTP Server (TLS) id 14.3.468.0; Mon, 9 Sep 2019 17:46:17 +0200 From: Veeraiyan Chidambaram To: Felipe Balbi , Greg Kroah-Hartman , Geert Uytterhoeven , Yoshihiro Shimoda , Linux-Renesas CC: , Andrew Gabbasov , Eugeniu Rosca , , Veeraiyan Chidambaram Subject: [PATCH v4 1/3] usb: renesas_usbhs: simplify usbhs_status_get_device_state() Date: Mon, 9 Sep 2019 17:46:12 +0200 Message-ID: <1568043974-1236-1-git-send-email-external.veeraiyan.c@de.adit-jv.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.72.93.148] Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org From: Eugeniu Rosca Similar to usbhs_status_get_ctrl_stage(), *_get_device_state() is not supposed to return any error code since its return value is the DVSQ bitfield of the INTSTS0 register. According to SoC HW manual rev1.00, every single value of DVSQ[2:0] is valid and none is an error: ----8<---- Device State 000: Powered state 001: Default state 010: Address state 011: Configuration state 1xx: Suspended state ----8<---- Hence, simplify the function body. The motivation behind dropping the switch/case construct is being able to implement reading the suspended state. The latter (based on the above DVSQ[2:0] description) doesn't have a unique value, but is rather a list of states (which makes switch/case less suitable for reading/validating it): 100: (Suspended) Powered state 101: (Suspended) Default state 110: (Suspended) Address state 111: (Suspended) Configuration state Signed-off-by: Eugeniu Rosca Signed-off-by: Veeraiyan Chidambaram Reviewed-by: Yoshihiro Shimoda --- v4: patch sequence change v3: https://patchwork.kernel.org/patch/11137697/ v2: https://patchwork.kernel.org/patch/11135111/ v1: https://patchwork.kernel.org/patch/10581479/ drivers/usb/renesas_usbhs/mod.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c index 7475c4f64724..4fbb1d538b82 100644 --- a/drivers/usb/renesas_usbhs/mod.c +++ b/drivers/usb/renesas_usbhs/mod.c @@ -170,17 +170,7 @@ void usbhs_mod_remove(struct usbhs_priv *priv) */ int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state) { - int state = irq_state->intsts0 & DVSQ_MASK; - - switch (state) { - case POWER_STATE: - case DEFAULT_STATE: - case ADDRESS_STATE: - case CONFIGURATION_STATE: - return state; - } - - return -EIO; + return (int)irq_state->intsts0 & DVSQ_MASK; } int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state)