Re: [PATCH 2/2] PCI: dra7xx: Fix error handling when IRQ request fails in probe

["Kumar, Udit" <u-kumar1@xxxxxx>]

On 8/27/2024 5:54 PM, Siddharth Vadapalli wrote:
> Commit d4c7d1a089d6 ("PCI: dwc: dra7xx: Push request_irq() call to the
> bottom of probe") moved the IRQ request for "dra7xx-pcie-main" towards
> the end of dra7xx_pcie_probe(). However, the error handling does not take
> into account the initialization performed by either dra7xx_add_pcie_port()
> or dra7xx_add_pcie_ep(), depending on the mode of operation. Fix the error
> handling to address this.
>
> Fixes: d4c7d1a089d6 ("PCI: dwc: dra7xx: Push request_irq() call to the bottom of probe")
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx>
> ---
>   drivers/pci/controller/dwc/pci-dra7xx.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
> index 20fb50741f3d..5c62e1a3ba52 100644
> --- a/drivers/pci/controller/dwc/pci-dra7xx.c
> +++ b/drivers/pci/controller/dwc/pci-dra7xx.c
> @@ -854,11 +854,17 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)
>   					"dra7xx-pcie-main", dra7xx);
>   	if (ret) {
>   		dev_err(dev, "failed to request irq\n");
> -		goto err_gpio;
> +		goto err_deinit;
>   	}
>   
>   	return 0;
>   
> +err_deinit:
> +	if (dra7xx->mode == DW_PCIE_RC_TYPE)
> +		dw_pcie_host_deinit(&dra7xx->pci->pp);
> +	else
> +		dw_pcie_ep_deinit(&dra7xx->pci->ep);


dw_pcie_ep_deinit may not be available in previous kernels

Otherwise
Tested-by: Udit Kumar <u-kumar1@xxxxxx>

> +
>   err_gpio:
>   err_get_sync:
>   	pm_runtime_put(dev);