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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C5DE4C52D6F for ; Tue, 27 Aug 2024 10:06:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:CC:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=vgCiWELDcpYytjq14rr0S8v4LmxsbbO8P1LUp/lxNgk=; b=gQuscpKYWl58904f3qTf3m8n3Z N3VuLgcV1N9MKpTuvMcE4/39BIix2nBXUDc1XF71nSZIyaGHWeSeAyFqGnIpct7erEV0nysCrglFT TdN7dXzGoxwU1xoknT51M07+7yPOhd8vAhlvd4VQKZUEDBJD6EWlmm+ltvByaGY2/+kAxhbsWwM6f fXvdGUmRDLDxn9KjG+CKGt8aiiY7YFB5WVWKsccVVOyZl6nMrS2cIGzzVq+5cwWeYKg03LkEj7tZw tS6CKikEdZd+ye46zjUB0XTpIHoLvifTMcE6QAbl02hxSAez/CJ92uI2hO9d/mfcRRN5zMVKaRZYn xRzbQ66Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sit5J-0000000AjQP-00d2; Tue, 27 Aug 2024 10:05:57 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1siszA-0000000AhVr-1kuu; Tue, 27 Aug 2024 09:59:38 +0000 Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4WtNFv32sdz6J6xg; Tue, 27 Aug 2024 17:55:31 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id 3BCCF140447; Tue, 27 Aug 2024 17:59:29 +0800 (CST) Received: from localhost (10.203.177.66) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Tue, 27 Aug 2024 10:59:28 +0100 Date: Tue, 27 Aug 2024 10:59:27 +0100 From: Jonathan Cameron To: Krzysztof Kozlowski CC: Ulf Hansson , Heiko Stuebner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Bjorn Andersson , Konrad Dybcio , Geert Uytterhoeven , Magnus Damm , , , , , , , Subject: Re: [PATCH 02/10] pmdomain: rockchip: Simplify locking with guard() Message-ID: <20240827105927.00007ac7@Huawei.com> In-Reply-To: <20240823-cleanup-h-guard-pm-domain-v1-2-8320722eaf39@linaro.org> References: <20240823-cleanup-h-guard-pm-domain-v1-0-8320722eaf39@linaro.org> <20240823-cleanup-h-guard-pm-domain-v1-2-8320722eaf39@linaro.org> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.33; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.66] X-ClientProxiedBy: lhrpeml100003.china.huawei.com (7.191.160.210) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240827_025936_636129_4ABD04ED X-CRM114-Status: GOOD ( 17.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 23 Aug 2024 14:51:06 +0200 Krzysztof Kozlowski wrote: > Simplify error handling (smaller error handling) over locks with > guard(). > > Signed-off-by: Krzysztof Kozlowski Musing inline. LGTM Reviewed-by: Jonathan Cameron > --- > drivers/pmdomain/rockchip/pm-domains.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > > diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c > index 5679ad336a11..538dde58d924 100644 > --- a/drivers/pmdomain/rockchip/pm-domains.c > +++ b/drivers/pmdomain/rockchip/pm-domains.c > @@ -910,7 +910,7 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev) > * Prevent any rockchip_pmu_block() from racing with the remainder of > * setup (clocks, register initialization). > */ > - mutex_lock(&dmc_pmu_mutex); > + guard(mutex)(&dmc_pmu_mutex); > > for_each_available_child_of_node_scoped(np, node) { > error = rockchip_pm_add_one_domain(pmu, node); > @@ -943,13 +943,10 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev) > if (!WARN_ON_ONCE(dmc_pmu)) > dmc_pmu = pmu; > > - mutex_unlock(&dmc_pmu_mutex); > - > return 0; > > err_out: > rockchip_pm_domain_cleanup(pmu); I wonder. Could you use a devm_add_action_or_reset for this and allow early returns throughout? Would need to take the lock again perhaps and I haven't checked if there is any issue in dropping and retaking the mutex however. The block logic is non obvious so I couldn't quickly figure this out. > - mutex_unlock(&dmc_pmu_mutex); > return error; > } > >