linux-kernel - Re: [linux-next][PATCH] usb: dwc3: omap: remove IRQ

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Date:   Thu, 29 Jun 2017 09:51:15 +0530
From:   Vignesh R <vigneshr@...com>
To:     "Strashko, Grygorii" <grygorii.strashko@...com>,
        "GregKroah-Hartmangregkh@...uxfoundation.org" 
        <GregKroah-Hartmangregkh@...uxfoundation.org>,
        Tony Lindgren <tony@...mide.com>,
        Felipe Balbi <balbi@...nel.org>
CC:     "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Nori, Sekhar" <nsekhar@...com>
Subject: Re: [linux-next][PATCH] usb: dwc3: omap: remove IRQ_NOAUTOEN used
 with shared irq



On Thursday 29 June 2017 05:01 AM, Strashko, Grygorii wrote:
> IRQ_NOAUTOEN can't be used with shared IRQs and Kernel now will triggers
> warning if it happns, since commit 04c848d39879 ("genirq: Warn when
> IRQ_NOAUTOEN is used with shared interrupts"). And this is the case for
> OMAP DWC 3 driver.
> 
> Hence, remove IRQ_NOAUTOEN flag and instead call disable_irq() before
> disabling PM runtime in probe error path handling.

Or, how about requesting the irq at the end of probe after extcon
registration?

> 
> Fixes: 12a7f17fac5b ("usb: dwc3: omap: fix race of pm runtime with...")
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
>  drivers/usb/dwc3/dwc3-omap.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
> index 9892650..cd9bef5 100644
> --- a/drivers/usb/dwc3/dwc3-omap.c
> +++ b/drivers/usb/dwc3/dwc3-omap.c
> @@ -512,7 +512,6 @@ static int dwc3_omap_probe(struct platform_device *pdev)
>  
>  	/* check the DMA Status */
>  	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
> -	irq_set_status_flags(omap->irq, IRQ_NOAUTOEN);
>  	ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
>  					dwc3_omap_interrupt_thread, IRQF_SHARED,
>  					"dwc3-omap", omap);
> @@ -533,10 +532,10 @@ static int dwc3_omap_probe(struct platform_device *pdev)
>  	}
>  
>  	dwc3_omap_enable_irqs(omap);
> -	enable_irq(omap->irq);
>  	return 0;
>  
>  err1:
> +	disable_irq(omap->irq);
>  	pm_runtime_put_sync(dev);
>  	pm_runtime_disable(dev);
>  
> 

-- 
Regards
Vignesh