From: Jakub Kicinski <jakub.kicin...@netronome.com>
Date: Wed, 19 Sep 2018 14:42:50 -0700
> NFP supports fairly enormous ring sizes (up to 256k descriptors).
> In commit 466271703867 ("nfp: use kvcalloc() to allocate SW buffer
> descriptor arrays") we have started using kvcalloc() functions to
> make sure the allocation of software state arrays doesn't hit
> the MAX_ORDER limit. Unfortunately, we can't use virtual mappings
> for the DMA region holding HW descriptors. In case this allocation
> fails instead of the generic (and fairly scary) warning/splat in
> the logs print a helpful message explaining what happened and
> suggesting how to fix it.
>
> Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
> Reviewed-by: Dirk van der Merwe <dirk.vanderme...@netronome.com>
Applied.
