[PATCH v2] PCI: qcom: Fix pipe clock imbalance

From: Johan Hovold
Date: Fri Apr 01 2022 - 09:34:55 EST

Commit ed8cc3b1fc84 ("PCI: qcom: Add support for SDM845 PCIe
controller") introduced a clock imbalance by enabling the pipe clock
both in init() and in post_init() but only disabling in post_deinit().

Note that the pipe clock was also never disabled in the init() error
paths and that enabling the clock before powering up the PHY looks

Fixes: ed8cc3b1fc84 ("PCI: qcom: Add support for SDM845 PCIe controller")
Cc: stable@xxxxxxxxxxxxxxx # 5.6
Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>

Changes in v2
- Capitalise "Fix" in subject line according to PCI subsystem

drivers/pci/controller/dwc/pcie-qcom.c | 6 ------
1 file changed, 6 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index b79d98e5e228..20a0e6533a1c 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1238,12 +1238,6 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
goto err_disable_clocks;

- ret = clk_prepare_enable(res->pipe_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable pipe clock\n");
- goto err_disable_clocks;
- }
/* Wait for reset to complete, required on SM8450 */
usleep_range(1000, 1500);