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[109.252.193.103]) by smtp.googlemail.com with ESMTPSA id s8sm762729ljg.16.2021.04.24.00.35.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 24 Apr 2021 00:35:23 -0700 (PDT) Subject: Re: [PATCH 17/78] staging: media: vde: use pm_runtime_resume_and_get() To: Mauro Carvalho Chehab Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Greg Kroah-Hartman , Jonathan Hunter , Mauro Carvalho Chehab , Thierry Reding , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-tegra@vger.kernel.org References: <0eeb886803679cd908cb4576d35b2314993abd2c.1619191723.git.mchehab+huawei@kernel.org> From: Dmitry Osipenko Message-ID: <2349831b-e7cd-d38d-fc19-5fabf06f773e@gmail.com> Date: Sat, 24 Apr 2021 10:35:22 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <0eeb886803679cd908cb4576d35b2314993abd2c.1619191723.git.mchehab+huawei@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org 24.04.2021 09:44, Mauro Carvalho Chehab пишет: > Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") > added pm_runtime_resume_and_get() in order to automatically handle > dev->power.usage_count decrement on errors. > > Use the new API, in order to cleanup the error check logic. > > Signed-off-by: Mauro Carvalho Chehab > --- > drivers/staging/media/tegra-vde/vde.c | 16 ++++++++++------ > 1 file changed, 10 insertions(+), 6 deletions(-) > > diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c > index 28845b5bafaf..8936f140a246 100644 > --- a/drivers/staging/media/tegra-vde/vde.c > +++ b/drivers/staging/media/tegra-vde/vde.c > @@ -775,9 +775,9 @@ static int tegra_vde_ioctl_decode_h264(struct tegra_vde *vde, > if (ret) > goto release_dpb_frames; > > - ret = pm_runtime_get_sync(dev); > + ret = pm_runtime_resume_and_get(dev); > if (ret < 0) > - goto put_runtime_pm; > + goto unlock; > > /* > * We rely on the VDE registers reset value, otherwise VDE > @@ -843,6 +843,8 @@ static int tegra_vde_ioctl_decode_h264(struct tegra_vde *vde, > put_runtime_pm: > pm_runtime_mark_last_busy(dev); > pm_runtime_put_autosuspend(dev); > + > +unlock: > mutex_unlock(&vde->lock); > > release_dpb_frames: > @@ -1069,8 +1071,8 @@ static int tegra_vde_probe(struct platform_device *pdev) > * power-cycle it in order to put hardware into a predictable lower > * power state. > */ > - pm_runtime_get_sync(dev); > - pm_runtime_put(dev); > + if (pm_runtime_resume_and_get(dev) >= 0) > + pm_runtime_put(dev); > > return 0; > > @@ -1088,8 +1090,9 @@ static int tegra_vde_remove(struct platform_device *pdev) > { > struct tegra_vde *vde = platform_get_drvdata(pdev); > struct device *dev = &pdev->dev; > + int ret; > > - pm_runtime_get_sync(dev); > + ret = pm_runtime_resume_and_get(dev); > pm_runtime_dont_use_autosuspend(dev); > pm_runtime_disable(dev); > > @@ -1097,7 +1100,8 @@ static int tegra_vde_remove(struct platform_device *pdev) > * Balance RPM state, the VDE power domain is left ON and hardware > * is clock-gated. It's safe to reboot machine now. > */ > - pm_runtime_put_noidle(dev); > + if (ret >= 0) > + pm_runtime_put_noidle(dev); > clk_disable_unprepare(vde->clk); > > misc_deregister(&vde->miscdev); > Hello Mauro, Thank you very much for the patch. It looks to me that the original variant was a bit simpler, this patch adds more code lines without changing the previous behaviour. Or am I missing something? 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[109.252.193.103]) by smtp.googlemail.com with ESMTPSA id s8sm762729ljg.16.2021.04.24.00.35.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 24 Apr 2021 00:35:23 -0700 (PDT) Subject: Re: [PATCH 17/78] staging: media: vde: use pm_runtime_resume_and_get() To: Mauro Carvalho Chehab References: <0eeb886803679cd908cb4576d35b2314993abd2c.1619191723.git.mchehab+huawei@kernel.org> From: Dmitry Osipenko Message-ID: <2349831b-e7cd-d38d-fc19-5fabf06f773e@gmail.com> Date: Sat, 24 Apr 2021 10:35:22 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <0eeb886803679cd908cb4576d35b2314993abd2c.1619191723.git.mchehab+huawei@kernel.org> Content-Language: en-US X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Driver Project Developer List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, Greg Kroah-Hartman , linuxarm@huawei.com, Jonathan Hunter , linux-tegra@vger.kernel.org, Thierry Reding , mauro.chehab@huawei.com, Mauro Carvalho Chehab , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Content-Type: text/plain; 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