On 08/04/2021 08:26, Dinghao Liu wrote:
> pm_runtime_get_sync() will increase the runtime PM counter
> even it returns an error. Thus a pairing decrement is needed
> to prevent refcount leak. Fix this by replacing this API with
> pm_runtime_resume_and_get(), which will not change the runtime
> PM counter on error.
>
> Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
> ---
> drivers/pci/controller/dwc/pcie-tegra194.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c
> b/drivers/pci/controller/dwc/pcie-tegra194.c
> index 6fa216e52d14..0e94190ca4e8 100644
> --- a/drivers/pci/controller/dwc/pcie-tegra194.c
> +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
> @@ -1645,7 +1645,7 @@ static void pex_ep_event_pex_rst_deassert(struct
> tegra_pcie_dw *pcie)
> if (pcie->ep_state == EP_STATE_ENABLED)
> return;
>
> - ret = pm_runtime_get_sync(dev);
> + ret = pm_runtime_resume_and_get(dev);
> if (ret < 0) {
> dev_err(dev, "Failed to get runtime sync for PCIe dev: %d\n",
> ret);
>
There are two places in the driver where pm_runtime_get_sync() is called.
Thanks
Jon
--
nvpublic
