Re: [PATCH] clk: divider: Fix table round up function

From: Fabio Estevam
Date: Thu May 15 2014 - 09:28:51 EST


Hi Mike,

On Wed, May 7, 2014 at 1:48 PM, Maxime COQUELIN <maxime.coquelin@xxxxxx> wrote:
> Commit 1d9fe6b97 ("clk: divider: Fix best div calculation for power-of-two and
> table dividers") introduces a regression in its _table_round_up function.
>
> When the divider passed to this function is greater than the max divider
> available in the table, this function returns table's max divider.
> Problem is that it causes an infinite loop in clk_divider_bestdiv() because
> _next_div() will never return a value greater than maxdiv.
>
> Instead of returning table's max divider, this patch returns INT_MAX.
>
> Reported-by: Fabio Estevam <festevam@xxxxxxxxx>
> Reported-by: Shawn Guo <shawn.guo@xxxxxxxxxxxxx>
> Tested-by: Fabio Estevam <festevam@xxxxxxxxx>
> Cc: Mike Turquette <mike.turquette@xxxxxxxxxx>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@xxxxxx>

Any comments on this one? It does fix a regression.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/