From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Dinghao Liu <dinghao.liu@zju.edu.cn>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Sasha Levin <sashal@kernel.org>,
linux-pci@vger.kernel.org, linux-renesas-soc@vger.kernel.org
Subject: [PATCH AUTOSEL 5.14 10/32] PCI: rcar: Fix runtime PM imbalance in rcar_pcie_ep_probe()
Date: Sat, 11 Sep 2021 09:11:27 -0400 [thread overview]
Message-ID: <20210911131149.284397-10-sashal@kernel.org> (raw)
In-Reply-To: <20210911131149.284397-1-sashal@kernel.org>
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
[ Upstream commit 1e29cd9983eba1b596bc07f94d81d728007f8a25 ]
pm_runtime_get_sync() will increase the runtime PM counter
even it returns an error. Thus a pairing decrement is needed
to prevent refcount leak. Fix this by replacing this API with
pm_runtime_resume_and_get(), which will not change the runtime
PM counter on error.
Link: https://lore.kernel.org/r/20210408072402.15069-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pci/controller/pcie-rcar-ep.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/pcie-rcar-ep.c b/drivers/pci/controller/pcie-rcar-ep.c
index b4a288e24aaf..c91d85b15129 100644
--- a/drivers/pci/controller/pcie-rcar-ep.c
+++ b/drivers/pci/controller/pcie-rcar-ep.c
@@ -492,9 +492,9 @@ static int rcar_pcie_ep_probe(struct platform_device *pdev)
pcie->dev = dev;
pm_runtime_enable(dev);
- err = pm_runtime_get_sync(dev);
+ err = pm_runtime_resume_and_get(dev);
if (err < 0) {
- dev_err(dev, "pm_runtime_get_sync failed\n");
+ dev_err(dev, "pm_runtime_resume_and_get failed\n");
goto err_pm_disable;
}
--
2.30.2
next parent reply other threads:[~2021-09-11 13:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210911131149.284397-1-sashal@kernel.org>
2021-09-11 13:11 ` Sasha Levin [this message]
2021-09-11 13:11 ` [PATCH AUTOSEL 5.14 12/32] PCI: rcar: Add L1 link state fix into data abort hook Sasha Levin
2021-09-11 16:05 ` Marek Vasut
2021-09-20 12:12 ` Sasha Levin
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