clk: qcom: mss-sc7180: fix missing resume during probe

commit e2349da0fa7ca822cda72f427345b95795358fe7 upstream.

Drivers that enable runtime PM must make sure that the controller is
runtime resumed before accessing its registers to prevent the power
domain from being disabled.

Fixes: 8def929c4097 ("clk: qcom: Add modem clock controller driver for SC7180")
Cc: stable@vger.kernel.org      # 5.7
Cc: Taniya Das <quic_tdas@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230718132902.21430-8-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/clk/qcom/mss-sc7180.c b/drivers/clk/qcom/mss-sc7180.c
index 5a14074..d106bc6 100644 (file)
--- a/drivers/clk/qcom/mss-sc7180.c
+++ b/drivers/clk/qcom/mss-sc7180.c
@@ -87,11 +87,22 @@ static int mss_sc7180_probe(struct platform_device *pdev)
                return ret;
        }
 
+       ret = pm_runtime_resume_and_get(&pdev->dev);
+       if (ret)
+               return ret;
+
        ret = qcom_cc_probe(pdev, &mss_sc7180_desc);
        if (ret < 0)
-               return ret;
+               goto err_put_rpm;
+
+       pm_runtime_put(&pdev->dev);
 
        return 0;
+
+err_put_rpm:
+       pm_runtime_put_sync(&pdev->dev);
+
+       return ret;
 }
 
 static const struct dev_pm_ops mss_sc7180_pm_ops = {