On Tue, Aug 15, 2023 at 10:41:39PM +0200, Andrew Lunn wrote:
> On Tue, Aug 15, 2023 at 08:35:59PM +0000, Justin Stitt wrote:
> > When building with clang 18 I see the following warning:
> > | drivers/net/mdio/mdio-xgene.c:338:13: warning: cast to smaller integer
> > | type 'enum xgene_mdio_id' from 'const void *' [-Wvoid-pointer-to-enum-cast]
> > | 338 | mdio_id = (enum xgene_mdio_id)of_id->data;
> >
> > This is due to the fact that `of_id->data` is a void* while `enum
> > xgene_mdio_id` has the size of an int. This leads to truncation and
> > possible data loss.
> >
> > Link: https://github.com/ClangBuiltLinux/linux/issues/1910
> > Reported-by: Nathan Chancellor <[email protected]>
> > Signed-off-by: Justin Stitt <[email protected]>
>
> Reviewed-by: Andrew Lunn <[email protected]>
I wonder whether it would be better to use device_get_match_data()
here? The whole of_match_device()...acpi_match_device() dance could
become:
+ mdio_id = (uintptr_t)device_get_match_data(&pdev->dev);
if (!mdio_id)
return -ENODEV;
It's probably something for a follow-up patch though.
Reviewed-by: Russell King (Oracle) <[email protected]>
Thanks!
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!