[PATCH] PCI: mediatek: Verify whether the free_ck clock is ungated or not

[Amey Narkhede]

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 at 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