On 12/7/2021 4:08 PM, Amelie Delaunay wrote:
> In case of probe defer, a message is logged for resets and clocks. Use
> dev_err_probe to log the message only when error code is not -517.
> Simplify phy, regulators and drd probe defer handling with dev_err_probe().
> Then, take benefit of devices_deferred debugfs in case of probe deferral.
>
> Signed-off-by: Amelie Delaunay <amelie.delaunay@xxxxxxxxxxx>
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx>
> ---
> drivers/usb/dwc2/platform.c | 53 +++++++++++--------------------------
> 1 file changed, 16 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
> index c8f18f3ba9e3..a1feaa09be57 100644
> --- a/drivers/usb/dwc2/platform.c
> +++ b/drivers/usb/dwc2/platform.c
> @@ -222,20 +222,16 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
> int i, ret;
>
> hsotg->reset = devm_reset_control_get_optional(hsotg->dev, "dwc2");
> - if (IS_ERR(hsotg->reset)) {
> - ret = PTR_ERR(hsotg->reset);
> - dev_err(hsotg->dev, "error getting reset control %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(hsotg->reset))
> + return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->reset),
> + "error getting reset control\n");
>
> reset_control_deassert(hsotg->reset);
>
> hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev, "dwc2-ecc");
> - if (IS_ERR(hsotg->reset_ecc)) {
> - ret = PTR_ERR(hsotg->reset_ecc);
> - dev_err(hsotg->dev, "error getting reset control for ecc %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(hsotg->reset_ecc))
> + return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->reset_ecc),
> + "error getting reset control for ecc\n");
>
> reset_control_deassert(hsotg->reset_ecc);
>
> @@ -251,11 +247,8 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
> case -ENOSYS:
> hsotg->phy = NULL;
> break;
> - case -EPROBE_DEFER:
> - return ret;
> default:
> - dev_err(hsotg->dev, "error getting phy %d\n", ret);
> - return ret;
> + return dev_err_probe(hsotg->dev, ret, "error getting phy\n");
> }
> }
>
> @@ -268,12 +261,8 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
> case -ENXIO:
> hsotg->uphy = NULL;
> break;
> - case -EPROBE_DEFER:
> - return ret;
> default:
> - dev_err(hsotg->dev, "error getting usb phy %d\n",
> - ret);
> - return ret;
> + return dev_err_probe(hsotg->dev, ret, "error getting usb phy\n");
> }
> }
> }
> @@ -282,10 +271,8 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
>
> /* Clock */
> hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");
> - if (IS_ERR(hsotg->clk)) {
> - dev_err(hsotg->dev, "cannot get otg clock\n");
> - return PTR_ERR(hsotg->clk);
> - }
> + if (IS_ERR(hsotg->clk))
> + return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->clk), "cannot get otg clock\n");
>
> /* Regulators */
> for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
> @@ -293,12 +280,9 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
>
> ret = devm_regulator_bulk_get(hsotg->dev, ARRAY_SIZE(hsotg->supplies),
> hsotg->supplies);
> - if (ret) {
> - if (ret != -EPROBE_DEFER)
> - dev_err(hsotg->dev, "failed to request supplies: %d\n",
> - ret);
> - return ret;
> - }
> + if (ret)
> + return dev_err_probe(hsotg->dev, ret, "failed to request supplies\n");
> +
> return 0;
> }
>
> @@ -558,16 +542,12 @@ static int dwc2_driver_probe(struct platform_device *dev)
> hsotg->usb33d = devm_regulator_get(hsotg->dev, "usb33d");
> if (IS_ERR(hsotg->usb33d)) {
> retval = PTR_ERR(hsotg->usb33d);
> - if (retval != -EPROBE_DEFER)
> - dev_err(hsotg->dev,
> - "failed to request usb33d supply: %d\n",
> - retval);
> + dev_err_probe(hsotg->dev, retval, "failed to request usb33d supply\n");
> goto error;
> }
> retval = regulator_enable(hsotg->usb33d);
> if (retval) {
> - dev_err(hsotg->dev,
> - "failed to enable usb33d supply: %d\n", retval);
> + dev_err_probe(hsotg->dev, retval, "failed to enable usb33d supply\n");
> goto error;
> }
>
> @@ -579,8 +559,7 @@ static int dwc2_driver_probe(struct platform_device *dev)
>
> retval = dwc2_drd_init(hsotg);
> if (retval) {
> - if (retval != -EPROBE_DEFER)
> - dev_err(hsotg->dev, "failed to initialize dual-role\n");
> + dev_err_probe(hsotg->dev, retval, "failed to initialize dual-role\n");
> goto error_init;
> }
>
