5.15-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
commit a9f71a033587c9074059132d34c74eabbe95ef26 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: 892df0191b29 ("clk: qcom: Add QCS404 TuringCC") Cc: stable@vger.kernel.org # 5.2 Cc: Bjorn Andersson andersson@kernel.org Signed-off-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20230718132902.21430-9-johan+linaro@kernel.org Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/clk/qcom/turingcc-qcs404.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
--- a/drivers/clk/qcom/turingcc-qcs404.c +++ b/drivers/clk/qcom/turingcc-qcs404.c @@ -124,11 +124,22 @@ static int turingcc_probe(struct platfor return ret; }
+ ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret) + return ret; + ret = qcom_cc_probe(pdev, &turingcc_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 turingcc_pm_ops = {