linux-kernel - Re: [PATCH v2 0/2] lib: checksum: Fix issues with checksum tests

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Date: Tue, 23 Jan 2024 16:23:30 -0800
From: Charlie Jenkins <charlie@...osinc.com>
To: Guenter Roeck <linux@...ck-us.net>
Cc: David Laight <David.Laight@...lab.com>,
	Palmer Dabbelt <palmer@...belt.com>, linux-kernel@...r.kernel.org,
	kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2 0/2] lib: checksum: Fix issues with checksum tests

On Tue, Jan 23, 2024 at 03:22:30PM -0800, Guenter Roeck wrote:
> On 1/23/24 13:58, Charlie Jenkins wrote:
> > The ip_fast_csum and csum_ipv6_magic tests did not have the data
> > types properly casted, and improperly misaligned data.
> > 
> > Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
> > ---
> > Changes in v2:
> > - Add additional patch to fix alignment issues
> > - Link to v1: https://lore.kernel.org/r/20240119-fix_sparse_errors_checksum_tests-v1-1-2d3df86d8d78@rivosinc.com
> > 
> 
> I applied both patches but see the following.
> 
>     KTAP version 1
>     # Subtest: checksum
>     # module: checksum_kunit
>     1..5
>     ok 1 test_csum_fixed_random_inputs
>     ok 2 test_csum_all_carry_inputs
>     ok 3 test_csum_no_carry_inputs
>     # test_ip_fast_csum: ASSERTION FAILED at lib/checksum_kunit.c:541
>     Expected ( u64)csum_result == ( u64)expected, but
>         ( u64)csum_result == 27015 (0x6987)
>         ( u64)expected == 55912 (0xda68)
>     not ok 4 test_ip_fast_csum
>     # test_csum_ipv6_magic: ASSERTION FAILED at lib/checksum_kunit.c:564
>     Expected ( u64)csum_result == ( u64)expected, but
>         ( u64)csum_result == 42151 (0xa4a7)
>         ( u64)expected == 5513 (0x1589)
>     not ok 5 test_csum_ipv6_magic
> # checksum: pass:3 fail:2 skip:0 total:5
> # Totals: pass:3 fail:2 skip:0 total:5
> not ok 17 checksum
> 
> Old result, before applying the patches (v6.8-rc1):
> 
>     KTAP version 1
>     # Subtest: checksum
>     # module: checksum_kunit
>     1..5
>     ok 1 test_csum_fixed_random_inputs
>     ok 2 test_csum_all_carry_inputs
>     ok 3 test_csum_no_carry_inputs
>     ok 4 test_ip_fast_csum
>     ok 5 test_csum_ipv6_magic
> # checksum: pass:5 fail:0 skip:0 total:5
> # Totals: pass:5 fail:0 skip:0 total:5
> ok 17 checksum
> 
> This is with the imx25-pdk emulation in qemu.
> 
> Guenter

Apologies for that, some garbage values snuck in. I'll send a new
version.

- Charlie

>