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Tue, 27 Aug 2024 03:30:25 -0700 (PDT) Received: from [192.168.1.20] ([178.197.222.82]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3730810fb76sm12879587f8f.8.2024.08.27.03.30.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Aug 2024 03:30:24 -0700 (PDT) Message-ID: <6f2c976c-2757-43c5-805f-e67724328b65@linaro.org> Date: Tue, 27 Aug 2024 12:30:22 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 02/10] pmdomain: rockchip: Simplify locking with guard() To: Jonathan Cameron Cc: Ulf Hansson , Heiko Stuebner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Bjorn Andersson , Konrad Dybcio , Geert Uytterhoeven , Magnus Damm , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-renesas-soc@vger.kernel.org References: <20240823-cleanup-h-guard-pm-domain-v1-0-8320722eaf39@linaro.org> <20240823-cleanup-h-guard-pm-domain-v1-2-8320722eaf39@linaro.org> <20240827105927.00007ac7@Huawei.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org On 27/08/2024 11:59, Jonathan Cameron wrote: > 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. I will take a look, but as you already pointed out it is a bit further from trivial functionally-equivalent cleanup. I might mess with the locks. Best regards, Krzysztof _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip