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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Laxman Dewangan <ldewangan@nvidia.com>,
	Jon Hunter <jonathanh@nvidia.com>, Vinod Koul <vkoul@kernel.org>,
	Dan Williams <dan.j.williams@intel.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] dmaengine: tegra210-adma: Fix runtime PM imbalance on error
Date: Fri, 22 May 2020 15:58:46 +0800
Message-ID: <20200522075846.30706-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/dma/tegra210-adma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index c4ce5dfb149b..803e1f4d5dac 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
 
 	ret = pm_runtime_get_sync(tdc2dev(tdc));
 	if (ret < 0) {
+		pm_runtime_put_sync(tdc2dev(tdc));
 		free_irq(tdc->irq, tdc);
 		return ret;
 	}
-- 
2.17.1


             reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-22  7:58 Dinghao Liu [this message]
2020-05-22 10:43 ` Jon Hunter
2020-05-22 10:57   ` dinghao.liu
2020-05-22 11:27     ` Jon Hunter
2020-05-22 11:32       ` dinghao.liu
  -- strict thread matches above, loose matches on Subject: below --
2020-05-21  8:05 Dinghao Liu

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