From patchwork Sat May 10 12:00:05 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Gautam X-Patchwork-Id: 4148051 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 65985BFF02 for ; Sat, 10 May 2014 12:03:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8CF0E201DC for ; Sat, 10 May 2014 12:03:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CDFC9201BB for ; Sat, 10 May 2014 12:03:06 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wj5xQ-0002s3-Lb; Sat, 10 May 2014 12:00:48 +0000 Received: from mail-pa0-x234.google.com ([2607:f8b0:400e:c03::234]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wj5xL-0002qy-2f for linux-arm-kernel@lists.infradead.org; Sat, 10 May 2014 12:00:43 +0000 Received: by mail-pa0-f52.google.com with SMTP id fa1so1353353pad.39 for ; Sat, 10 May 2014 05:00:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=LrnWVojwJbEx/WW9yhP6Y5fqzJVY0zF3/l13SySYWS8=; b=rJmZzlSmQPXiyNb58oTKm4ApC/AcTAUrv3MRXVJkltmL/FApuWr7EU09UbsjFRPG0u ILXcKyATbPh98smP4B01C2oG6+yiWoXEhCKP5WnLRb16ds2INrcz34oBvt1S3hjp2UQG FqELn7J1PKsWC3avbV3DBf6nW/7X+VWEZ9Fv5gQKAWKMH5X0VG5YR0GP0qPxggFGJ1vn PD8lYv/CrDg0SyVKLq2cfdF1XY/ktM2h/vlJUc6Nn3Nx0v7RyCfeAqfyVF9c4LOEwrv2 6EwDQK3Nf66sGMWrA+l359Pv/MsF8jjzwOOWG0WXKCa5dY60+yrUUcRdd8B/rasol3/a k82Q== X-Received: by 10.66.251.101 with SMTP id zj5mr20407980pac.154.1399723222297; Sat, 10 May 2014 05:00:22 -0700 (PDT) Received: from vivek-linuxpc.sisodomain.com ([14.140.216.146]) by mx.google.com with ESMTPSA id tb4sm21186685pac.45.2014.05.10.05.00.18 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 10 May 2014 05:00:21 -0700 (PDT) From: Vivek Gautam To: linux-usb@vger.kernel.org Subject: [PATCH v2 1/6] usb: host: ehci-exynos: Use devm_ioremap_resource instead of devm_ioremap Date: Sat, 10 May 2014 17:30:05 +0530 Message-Id: <1399723210-21569-2-git-send-email-gautam.vivek@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1399723210-21569-1-git-send-email-gautam.vivek@samsung.com> References: <1399723210-21569-1-git-send-email-gautam.vivek@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140510_050043_140917_62A85613 X-CRM114-Status: GOOD ( 11.42 ) X-Spam-Score: 0.2 (/) Cc: linux-samsung-soc@vger.kernel.org, shc_work@mail.ru, swarren@wwwdotorg.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, kgene.kim@samsung.com, stern@rowland.harvard.edu, Vivek Gautam , linux-tegra@vger.kernel.org, thierry.reding@gmail.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam --- drivers/usb/host/ehci-exynos.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c index 7f425ac..c23a6d9 100644 --- a/drivers/usb/host/ehci-exynos.c +++ b/drivers/usb/host/ehci-exynos.c @@ -135,10 +135,9 @@ skip_phy: hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); - hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len); - if (!hcd->regs) { - dev_err(&pdev->dev, "Failed to remap I/O memory\n"); - err = -ENOMEM; + hcd->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hcd->regs)) { + err = PTR_ERR(hcd->regs); goto fail_io; }