Re: [PATCH 3/3] hwrng: mxc-fsl - add support for Freescale RNGC

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On Mon, Feb 29, 2016 at 06:16:50PM -0300, Fabio Estevam wrote:
> On Mon, Feb 29, 2016 at 12:52 PM, Steffen Trumtrar
> <s.trumtrar@xxxxxxxxxxxxxx> wrote:
> 
> > +       ret = clk_prepare_enable(rngc->clk);
> > +       if (ret)
> > +               return ret;
> > +
> > +       rngc->irq = platform_get_irq(pdev, 0);
> > +       if (!rngc->irq) {
> > +               dev_err(&pdev->dev, "FSL RNGC couldn't get irq\n");
> > +               clk_disable_unprepare(rngc->clk);
> > +
> > +               return ret;
> 
> You are returning the wrong error code here:
> 
> Better do like this:
> 
>        rngc->irq = platform_get_irq(pdev, 0);
>        if (rngc->irq < 0) {

rngc->irq is unsigned, so this is never true.

>                dev_err(&pdev->dev, "FSL RNGC couldn't get irq\n");
>                clk_disable_unprepare(rngc->clk);
>                return rngc->irq;
>        }

So here comes my better approach:

	ret = platform_get_irq(pdev, 0);
	if (ret <= 0) {
		if (ret == 0)
			ret = -EINVAL;
		dev_err(&pdev->dev, "FSL RNGC couldn't get irq\n");
		clk_disable_unprepare(rngc->clk);

		return ret;
	}

	rngc->irq = ret;

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux