[PATCH v2] PCI: mediatek: Check return value of clk_prepare_enable

[PATCH v2] PCI: mediatek: Check return value of clk_prepare_enable

[Amey Narkhede]

In case when free_ck clock is not enabled during device resume
check the return value of clk_prepare_enable() and return the
error after printing it.

Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
---
Changes in v2:
	- Print the error before returning
	- Clarify commit log
 drivers/pci/controller/pcie-mediatek.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 23548b517..9bdae34cc 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -1154,11 +1154,16 @@ 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) {
+		dev_err(dev, "Failed to enable free_ck clock\n");
+		return ret;
+	}

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

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel