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x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfDKgOp6GVpSgEL4odWhPvzZzEj1ygsRVX7dJSmyo03N59wsAG+6ACaSjkpFEVA2i9VN/kmYG5I38QNaFosyAThgnahDytrmYqLYaXxnX1yYfy5Fy3Nhc 86gTLZfco/gZi3o12sT6K13fkm3cXf9pfbVe4YAUXNfKba9UBGtCE+39kbFlFs8V/uwiyeBMmBHRdzII6Wt9ZpFRqESCoxIuplQ9IgjkxZQXcYwcWJ0xIpzp X-CM-Analysis: v=2.3 cv=JLoVTfCb c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=VUJBJC2UJ8kA:10 a=c-n4J4-pAAAA:8 a=VwQbUJbxAAAA:8 a=hsqrQ9mG0DeuFLRPhqIA:9 a=QEXdDO2ut3YA:10 a=x8gzFH9gYPwA:10 a=L0NDqeB7ZLmQzAogN4cw:22 a=AjGcO6oz07-iQ99wixmX:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755492AbeEAOIZ (ORCPT ); Tue, 1 May 2018 10:08:25 -0400 Received: from conssluserg-05.nifty.com ([210.131.2.90]:17948 "EHLO conssluserg-05.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755199AbeEAOIW (ORCPT ); Tue, 1 May 2018 10:08:22 -0400 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-05.nifty.com w41E7q7x011885 X-Nifty-SrcIP: [209.85.213.53] X-Google-Smtp-Source: AB8JxZpcNQg63BMMYrnaQ/zQaJyrgvyrxoyz81KskHTbGEbGaDKKnamVHkxAIaJrg6Tna2EQLj5Bp2il3TkNlZ5AdTk= MIME-Version: 1.0 In-Reply-To: <1524135818-14825-2-git-send-email-yamada.masahiro@socionext.com> References: <1524135818-14825-1-git-send-email-yamada.masahiro@socionext.com> <1524135818-14825-2-git-send-email-yamada.masahiro@socionext.com> From: Masahiro Yamada Date: Tue, 1 May 2018 23:07:11 +0900 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 1/2] usb: dwc3: use local copy of resource to fix-up register offset To: linux-usb@vger.kernel.org, Felipe Balbi Cc: Rob Herring , Roger Quadros , Martin Blumenstingl , Masami Hiramatsu , Jassi Brar , Kunihiko Hayashi , Masahiro Yamada , Greg Kroah-Hartman , Felipe Balbi , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Sender: linux-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Hi Felipe, 2018-04-19 20:03 GMT+09:00 Masahiro Yamada : > It is not a good idea to directly modify the resource of a platform > device. Modify its local copy, and pass it to devm_ioremap_resource() > so that we do not need to restore it in the failure path and the remove > hook. > > Signed-off-by: Masahiro Yamada > Reviewed-by: Masami Hiramatsu I want this patch applied first unless you are opposed to this clean-up. I'd like to avoid re-sending a trivial patch like this. > --- > > Changes in v2: None > > drivers/usb/dwc3/core.c | 32 ++++++++------------------------ > 1 file changed, 8 insertions(+), 24 deletions(-) > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index a15648d..8e66edd 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -1245,7 +1245,7 @@ static void dwc3_check_params(struct dwc3 *dwc) > static int dwc3_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > - struct resource *res; > + struct resource *res, dwc_res; > struct dwc3 *dwc; > > int ret; > @@ -1270,20 +1270,19 @@ static int dwc3_probe(struct platform_device *pdev) > dwc->xhci_resources[0].flags = res->flags; > dwc->xhci_resources[0].name = res->name; > > - res->start += DWC3_GLOBALS_REGS_START; > - > /* > * Request memory region but exclude xHCI regs, > * since it will be requested by the xhci-plat driver. > */ > - regs = devm_ioremap_resource(dev, res); > - if (IS_ERR(regs)) { > - ret = PTR_ERR(regs); > - goto err0; > - } > + dwc_res = *res; > + dwc_res.start += DWC3_GLOBALS_REGS_START; > + > + regs = devm_ioremap_resource(dev, &dwc_res); > + if (IS_ERR(regs)) > + return PTR_ERR(regs); > > dwc->regs = regs; > - dwc->regs_size = resource_size(res); > + dwc->regs_size = resource_size(&dwc_res); > > dwc3_get_properties(dwc); > > @@ -1350,29 +1349,14 @@ static int dwc3_probe(struct platform_device *pdev) > pm_runtime_put_sync(&pdev->dev); > pm_runtime_disable(&pdev->dev); > > -err0: > - /* > - * restore res->start back to its original value so that, in case the > - * probe is deferred, we don't end up getting error in request the > - * memory region the next time probe is called. > - */ > - res->start -= DWC3_GLOBALS_REGS_START; > - > return ret; > } > > static int dwc3_remove(struct platform_device *pdev) > { > struct dwc3 *dwc = platform_get_drvdata(pdev); > - struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > pm_runtime_get_sync(&pdev->dev); > - /* > - * restore res->start back to its original value so that, in case the > - * probe is deferred, we don't end up getting error in request the > - * memory region the next time probe is called. > - */ > - res->start -= DWC3_GLOBALS_REGS_START; > > dwc3_debugfs_exit(dwc); > dwc3_core_exit_mode(dwc); > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Best Regards Masahiro Yamada