linux-kernel - Re: [PATCH v10 6/6] usb: dwc3: qcom: Enable the interrupts during probe

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Message-ID: <93b68251-7e7e-ac92-fb47-346c410744b2@kali.org>
Date:   Tue, 18 Jan 2022 00:12:30 -0600
From:   Steev Klimaszewski <steev@...i.org>
To:     Sandeep Maheswaram <quic_c_sanm@...cinc.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Mathias Nyman <mathias.nyman@...el.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_pkondeti@...cinc.com,
        quic_ppratap@...cinc.com
Subject: Re: [PATCH v10 6/6] usb: dwc3: qcom: Enable the interrupts during
 probe


On 1/16/22 11:44 PM, Sandeep Maheswaram wrote:
> Enable the interrupts during probe and remove the disable interrupts
> function.
>
> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@...cinc.com>
> ---
>   drivers/usb/dwc3/dwc3-qcom.c | 28 ++++------------------------
>   1 file changed, 4 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index 54dc3d3..7c5e636 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -306,25 +306,7 @@ static void dwc3_qcom_enable_wakeup_irq(int irq)
>   	enable_irq_wake(irq);
>   }
>   
> -static void dwc3_qcom_disable_wakeup_irq(int irq)
> -{
> -	if (!irq)
> -		return;
> -
> -	disable_irq_wake(irq);
> -	disable_irq_nosync(irq);
> -}
>   
> -static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
> -{
> -	dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);
> -
> -	dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
> -
> -	dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
> -
> -	dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
> -}
>   
>   static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
>   {
> @@ -356,9 +338,6 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
>   	if (ret)
>   		dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
>   
> -	if (device_may_wakeup(qcom->dev))
> -		dwc3_qcom_enable_interrupts(qcom);
> -
>   	qcom->is_suspended = true;
>   
>   	return 0;
> @@ -372,9 +351,6 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
>   	if (!qcom->is_suspended)
>   		return 0;
>   
> -	if (device_may_wakeup(qcom->dev))
> -		dwc3_qcom_disable_interrupts(qcom);
> -
>   	for (i = 0; i < qcom->num_clocks; i++) {
>   		ret = clk_prepare_enable(qcom->clks[i]);
>   		if (ret < 0) {
> @@ -832,6 +808,10 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>   	genpd->flags |= GENPD_FLAG_ALWAYS_ON;
>   
>   	device_init_wakeup(&pdev->dev, 1);
> +
> +	if (device_may_wakeup(qcom->dev))
> +		dwc3_qcom_enable_interrupts(qcom);
> +
>   	qcom->is_suspended = false;
>   	pm_runtime_set_active(dev);
>   	pm_runtime_enable(dev);

Hi Sandeep,

I was testing this series on my Lenovo Yoga C630, and with this patch in 
particular applied, my system will no longer boot. Unfortunately I don't 
get any sort of good output at all, I just get hung tasks when trying to 
probe things it would seem.


With the other 5 patches in the series applied, the system still boots 
and works correctly.


-- Steev