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@rivosinc.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

---
Charlie Jenkins (2):
      lib: checksum: Fix type casting in checksum kunits
      lib: checksum: Use aligned accesses for ip_fast_csum and csum_ipv6_magic tests

 lib/checksum_kunit.c | 460 +++++++++++++++++++++++----------------------------
 1 file changed, 203 insertions(+), 257 deletions(-)
---
base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
change-id: 20240119-fix_sparse_errors_checksum_tests-26b86b34d784
-- 
- Charlie

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@rivosinc.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

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@rivosinc.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

>