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From: Amey Narkhede <ameynarkhede03@gmail.com>
To: Ryder Lee <ryder.lee@mediatek.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
	linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	Amey Narkhede <ameynarkhede03@gmail.com>
Subject: [PATCH] PCI: mediatek: Verify whether the free_ck clock is ungated or not
Date: Thu, 29 Apr 2021 19:17:49 +0530	[thread overview]
Message-ID: <20210429134749.75157-1-ameynarkhede03@gmail.com> (raw)

Verify that the free_ck clock is ungated on device resume
by checking return value of clk_prepare_enable().

Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
---
 drivers/pci/controller/pcie-mediatek.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 23548b517..9b13214bf 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -1154,11 +1154,14 @@ static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev)
 {
 	struct mtk_pcie *pcie = dev_get_drvdata(dev);
 	struct mtk_pcie_port *port, *tmp;
+	int ret;

 	if (list_empty(&pcie->ports))
 		return 0;

-	clk_prepare_enable(pcie->free_ck);
+	ret = clk_prepare_enable(pcie->free_ck);
+	if (ret)
+		return ret;

 	list_for_each_entry_safe(port, tmp, &pcie->ports, list)
 		mtk_pcie_enable_port(port);
--
2.31.1

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             reply	other threads:[~2021-04-29 13:49 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-29 13:47 Amey Narkhede [this message]
2021-04-29 22:38 ` [PATCH] PCI: mediatek: Verify whether the free_ck clock is ungated or not Bjorn Helgaas
2021-04-30  6:43   ` Amey Narkhede

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