On Thu, Oct 03, 2024 at 08:53:15PM +0200, Christophe JAILLET wrote:
> If 'frame_size' is too small or if 'round_len' is an error code, it is
> likely that an error code should be returned to the caller.
>
> Actually, 'ret' is likely to be 0, so if one of these sanity checks fails,
> 'success' is returned.
Hi Christophe,
I think we can say "'ret' will be 0".
At least that is what my brief investigation tells me.
>
> Return -EINVAL instead.
Please include some information on how this was found and tested.
e.g.
Found by inspection / Found using widget-ng.
Compile tested only.
>
> Fixes: bc93e19d088b ("net: ethernet: adi: Add ADIN1110 support")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
> ---
> This patch is speculative.
> If returning 0 is what was intended, then an explicit 0 would be better.
In my brief investigation I see that adin1110_read_fifo()
is only called by adin1110_read_frames(), like this:
while (budget) {
...
ret = adin1110_read_fifo(port_priv);
if (ret < 0)
return;
budget--;
}
So the question becomes, should a failure in reading the fifo,
because of an invalid frame size, be treated as an error
and terminate reading frames.
Like you, I speculate the answer is yes.
But I think we need a bit more certainty to take this patch.
--
pw-bot: under-review
