[Mesa-dev] [PATCH] intel: devinfo: fix assertion on devices with odd number of EUs

[Kenneth Graunke]

On Monday, April 23, 2018 9:52:37 AM PDT Lionel Landwerlin wrote:
> I forgot to change the assert in the second helper function in a
> previous change.
> 
> This hit the assert() on a Broadwell platform with quite a few EUs
> fused off :
>    https://i.imgur.com/4Wx6tjz.png

Not sure this link will stay live forever...

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

> Fixes: c1900f5b0fb ("intel: devinfo: add helper functions to fill fusing masks values")
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
>  src/intel/dev/gen_device_info.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/src/intel/dev/gen_device_info.c b/src/intel/dev/gen_device_info.c
> index dfeab6e6060..aa72d96e178 100644
> --- a/src/intel/dev/gen_device_info.c
> +++ b/src/intel/dev/gen_device_info.c
> @@ -1044,11 +1044,7 @@ gen_device_info_update_from_topology(struct gen_device_info *devinfo,
>     for (int b = 0; b < eu_mask_len; b++)
>        n_eus += __builtin_popcount(devinfo->eu_masks[b]);
> 
> -   /* We expect the total number of EUs to be uniformly distributed throughout
> -    * the subslices.
> -    */
> -   assert(n_subslices && (n_eus % n_subslices) == 0);
> -   devinfo->num_eu_per_subslice = n_eus / n_subslices;
> +   devinfo->num_eu_per_subslice = DIV_ROUND_UP(n_eus, n_subslices);
>  }
> 
>  bool
> --
> 2.17.0
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