clk: qcom: lpasscc-sc7280: fix missing resume during probe

commit 66af5339d4f8e20c6d89a490570bd94d40f1a7f6 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: 4ab43d171181 ("clk: qcom: Add lpass clock controller driver for SC7280")
Cc: stable@vger.kernel.org      # 5.16
Cc: Taniya Das <quic_tdas@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230718132902.21430-6-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/lpasscc-sc7280.c b/drivers/clk/qcom/lpasscc-sc7280.c
index 8486d7135ab1044737c4444e1c21e1a3121cfdb0..113146835902b7aa6f2e8c7b8b236e5b1a9ce0f4 100644 (file)
--- a/drivers/clk/qcom/lpasscc-sc7280.c
+++ b/drivers/clk/qcom/lpasscc-sc7280.c
@@ -115,9 +115,13 @@ static int lpass_cc_sc7280_probe(struct platform_device *pdev)
        ret = pm_clk_add(&pdev->dev, "iface");
        if (ret < 0) {
                dev_err(&pdev->dev, "failed to acquire iface clock\n");
-               goto destroy_pm_clk;
+               goto err_destroy_pm_clk;
        }
 
+       ret = pm_runtime_resume_and_get(&pdev->dev);
+       if (ret)
+               goto err_destroy_pm_clk;
+
        if (!of_property_read_bool(pdev->dev.of_node, "qcom,adsp-pil-mode")) {
                lpass_regmap_config.name = "qdsp6ss";
                lpass_regmap_config.max_register = 0x3f;
@@ -125,7 +129,7 @@ static int lpass_cc_sc7280_probe(struct platform_device *pdev)
 
                ret = qcom_cc_probe_by_index(pdev, 0, desc);
                if (ret)
-                       goto destroy_pm_clk;
+                       goto err_put_rpm;
        }
 
        lpass_regmap_config.name = "top_cc";
@@ -134,11 +138,15 @@ static int lpass_cc_sc7280_probe(struct platform_device *pdev)
 
        ret = qcom_cc_probe_by_index(pdev, 1, desc);
        if (ret)
-               goto destroy_pm_clk;
+               goto err_put_rpm;
+
+       pm_runtime_put(&pdev->dev);
 
        return 0;
 
-destroy_pm_clk:
+err_put_rpm:
+       pm_runtime_put_sync(&pdev->dev);
+err_destroy_pm_clk:
        pm_clk_destroy(&pdev->dev);
 
 disable_pm_runtime: