[lvc-project] [PATCH] ssb-main: Fix division by zero in ssb_calc_clock_rate()

[Krzysztof Kozlowski]

On 29/08/2023 13:12, Rand Deeb wrote:
> In the line 910, the value of m1 may be zero, so there is a possibility
> of dividing by zero, we fixed it by checking the values before dividing
> (found with SVACE). In the same way, after checking and reading the
> function, we found that lines 906, 908, 912 have the same situation, so
> we fixed them as well.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Rand Deeb <deeb.rand at confident.ru>
> ---
>  drivers/ssb/main.c | 16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
> index 0a26984acb2c..e0776a16d04d 100644
> --- a/drivers/ssb/main.c
> +++ b/drivers/ssb/main.c
> @@ -903,13 +903,21 @@ u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
>  		case SSB_CHIPCO_CLK_MC_BYPASS:
>  			return clock;
>  		case SSB_CHIPCO_CLK_MC_M1:
> -			return (clock / m1);
> +			if (m1 !=3D 0)

Address list does not look like patch for mainline, but anyway: Your
patch is corrupted. Fix your email setup.

Best regards,
Krzysztof