On Wed, Oct 27, 2021 at 9:17 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> On Mon, Oct 25, 2021 at 10:57 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote:
> > Make sure we return error in case devm_ioremap_resource() fails for dirmap
> > resource.
> >
> > Fixes: ca7d8b980b67 ("memory: add Renesas RPC-IF driver")
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> > Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
>
> Thanks for your patch!
>
> > --- a/drivers/memory/renesas-rpc-if.c
> > +++ b/drivers/memory/renesas-rpc-if.c
> > @@ -243,7 +243,7 @@ int rpcif_sw_init(struct rpcif *rpc, struct device *dev)
> > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirmap");
> > rpc->dirmap = devm_ioremap_resource(&pdev->dev, res);
> > if (IS_ERR(rpc->dirmap))
> > - rpc->dirmap = NULL;
> > + return PTR_ERR(rpc->dirmap);
>
> IIRC, it was intentional to make the dirmap optional (because the
> device can be used without and/or because some variants on other SoCs
> lack it?). Unfortunately this is not reflected in the DT bindings
> (yet?). All code using the dirmap does check if rpc->dirmap is
> valid first.
>
> > rpc->size = resource_size(res);
Of course this will crash if the dirmap is not present, so for now it's better
to just bail out.
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> >
> > rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
