[PATCH v1 5/6] net/ice: use caller-owned pattern match storage

[Bruce Richardson]

On Tue, Oct 20, 2026 at 01:11:08PM +0100, Anatoly Burakov wrote:
> Pattern lookup allocates a match item just to copy an entry from the
> engine's supported-pattern table. Each engine must then free this
> temporary object after parsing.
> 
> Make `ice_search_pattern_match_item()` fill caller-provided storage
> and return a status code. Use stack-local match items in all four
> engines, removing the allocation and corresponding cleanup paths.
> 
> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>

I'm sure there are still plenty more cleanups that can be done converting
dynamic to stack storage. Even a quick review of this change shows that the
"rss_meta_ptr" value in ice_hash_parse_pattern_action can be just put on
stack to simplify the code.
> ---
>  drivers/net/intel/ice/ice_acl_filter.c    | 22 ++++++++------------
>  drivers/net/intel/ice/ice_fdir_filter.c   | 18 ++++++++--------
>  drivers/net/intel/ice/ice_generic_flow.c  | 25 +++++------------------
>  drivers/net/intel/ice/ice_generic_flow.h  |  3 ++-
>  drivers/net/intel/ice/ice_hash.c          | 13 +++++-------
>  drivers/net/intel/ice/ice_switch_filter.c | 14 +++++--------
>  6 files changed, 34 insertions(+), 61 deletions(-)
>