Hello Fabio,
On Mon, Feb 29, 2016 at 08:54:19PM -0300, Fabio Estevam wrote:
> On Mon, Feb 29, 2016 at 6:38 PM, Uwe Kleine-König
> <u.kleine-koenig@xxxxxxxxxxxxxx> wrote:
> > 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:
>
> As irq is only used inside probe it can be removed from struct mxc_rngc.
Good idea.
> Or maybe like this:
>
> ret = platform_get_irq(pdev, 0);
> if (ret < 0) {
> dev_err(&pdev->dev, "FSL RNGC couldn't get irq\n");
> clk_disable_unprepare(rngc->clk);
> return ret;
> }
Some people think platform_get_irq returning 0 should be handled as
error.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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