>
> On 4/27/20 4:40 AM, Wei Yongjun wrote:
> > platform_get_resource() may fail and return NULL, so we should better
> > check it's return value to avoid a NULL pointer dereference a bit
> > later in the code.
> >
> > This is detected by Coccinelle semantic patch.
> >
> > @@
> > expression pdev, res, n, t, e, e1, e2; @@
> >
> > res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t, n);
> > + if (!res)
> > + return -EINVAL;
> > ... when != res == NULL
> > e = devm_ioremap(e1, res->start, e2);
> >
> > Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
> > ---
>
> Could we use devm_platform_ioremap_resource() instead?
We cannot use devm_platform_ioremap_resource() here, see
Commit 03f66f067560 ("net: ethernet: ti: davinci_mdio: use devm_ioremap()")
Regards
