Re: [PATCH 1/4] net: fix uninitialised access in mii_nway_restart()

[Jakub Kicinski <kuba@kernel.org>]

On Thu, 10 Apr 2025 23:15:23 +0100 Qasim Ijaz wrote:
> Apologies for my delayed response, I had another look at this and I
> think my patch may be off a bit. You are correct that there are multiple
> mdio_read() calls and looking at the mii.c file we can see that calls to
> functions like mdio_read (and a lot of others) dont check return values.
>   
> So in light of this I think a better patch would be to not edit the 
> mii.c file at all and just make ch9200_mdio_read return 0 on     
> error. This way if mdio_read fails and 0 is returned, the         
> check for "bmcr & BMCR_ANENABLE" won't be triggered and mii_nway_restart
> will just return 0 and end. If we return a negative on error it may
> contain the exact bit the function checks.
> 
> Similiar to this patch:
> <https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c68b2c9eba38>
> 
> If this sounds good, should i send another patch series with all the
> changes? 

SG