RE: [PATCH 1/2] net/i40e: compilation fix for GCC-12

["Morten Brørup" <mb@smartsharesystems.com>]

> From: Amit Prakash Shukla [mailto:amitprakashs@marvell.com]
> Sent: Friday, 26 August 2022 11.45
> 
> Thanks Morten for the review comment.
> 
> As the change is not in datapath, branch prediction optimization was
> not done.

OK. Then I agree that it is not required.

> 
> > -----Original Message-----
> > From: Amit Prakash Shukla <amitprakashs@marvell.com>
> > Sent: Wednesday, August 24, 2022 7:34 PM
> >
> > GCC 12 raises the following warning:
> >
> > meson --werror --buildtype=debugoptimized
> > 	--cross-file config/x86/cross-mingw -Dexamples=helloworld build
> > ninja -C build
> >
> > In function 'i40e_hash_get_pattern_type',
> >     inlined from 'i40e_hash_get_pattern_pctypes' at
> > ../drivers/net/i40e/i40e_hash.c:520:8,
> >     inlined from 'i40e_hash_parse_pattern_act' at
> > ../drivers/net/i40e/i40e_hash.c:1147:9,
> >     inlined from 'i40e_hash_parse' at
> > ../drivers/net/i40e/i40e_hash.c:1181:9:
> > ../drivers/net/i40e/i40e_hash.c:389:47:
> > 	error: array subscript 53 is above array
> > 	bounds of 'const uint64_t[53]'
> > 	{aka 'const long long unsigned int[53]'} [-Werror=array-bounds]
> >   389 |                 item_hdr =
> pattern_item_header[last_item_type];
> >       |
> ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
> > ../drivers/net/i40e/i40e_hash.c: In function 'i40e_hash_parse':
> > ../drivers/net/i40e/i40e_hash.c:182:23: note: while referencing
> > 'pattern_item_header'
> >   182 | static const uint64_t pattern_item_header[] = {
> >       |                       ^~~~~~~~~~~~~~~~~~~
> > cc1: all warnings being treated as errors
> >
> > Fixes: ef4c16fd9148 (net/i40e: refactor RSS flow)
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Amit Prakash Shukla <amitprakashs@marvell.com>
> > ---
> > v2:
> > - Removed "examples/ipsec-secgw" patch from this series and posted it
> as
> > seperate patch.
> >
> >  drivers/net/i40e/i40e_hash.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/i40e/i40e_hash.c
> b/drivers/net/i40e/i40e_hash.c
> > index 8962e9d97a..a1ff85fceb 100644
> > --- a/drivers/net/i40e/i40e_hash.c
> > +++ b/drivers/net/i40e/i40e_hash.c
> > @@ -384,8 +384,10 @@ i40e_hash_get_pattern_type(const struct
> > rte_flow_item pattern[],
> >  		}
> >
> >  		prev_item_type = last_item_type;
> > -		assert(last_item_type < (enum rte_flow_item_type)
> > -				RTE_DIM(pattern_item_header));
> > +		if (last_item_type >= (enum rte_flow_item_type)
> > +				RTE_DIM(pattern_item_header))
> > +			goto not_sup;
> > +
> >  		item_hdr = pattern_item_header[last_item_type];
> >  		assert(item_hdr);
> >
> > --
> > 2.25.1
>