[lkml]   [2019]   [Apr]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRE: [PATCH v3 2/2] clk:mmp: clk-mix.c fix divide-by-zero
On Wed, Apr 24, 2019 at 7:00 AM Stephen Boyd <> wrote:
>Quoting nixiaoming (2019-03-30 06:55:42)
>> The _get_div() function has a branch with a return value of 0
>> Add a check on the return value of _get_div() to avoid divide-by-zero
>Are you seeing this in practice? Or just trying to avoid a div-by-zero
>case that you've found from inspection?
This potential bug is found by code inspection.
_get_div() is defined as a static function which is only refered twice
in drivers/clk/mmp/clk-mix.c. In both cases the return value of _get_div()
is used as divider without any check.
If _get_div() never returns 0, then the branch returning 0 is dead code,
or the return value should be check to avoid dividing by zero error.


>> Signed-off-by: nixiaoming <>
>> Reviewed-by: Mukesh Ojha <>
 \ /
  Last update: 2019-04-24 17:35    [W:0.046 / U:3.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site