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| author | Gal Pressman <gal@nvidia.com> | 2026-01-12 20:37:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-30 12:27:24 +0300 |
| commit | a3f895d4494a8c3ee92bbb0baa36cc20501e8df5 (patch) | |
| tree | daaf697eeae6c0cdf9e34a08412c6e54adbb1a64 /tools/testing | |
| parent | 9356b69d03d0f50cce91cebdabd33dda023fbd64 (diff) | |
| download | linux-a3f895d4494a8c3ee92bbb0baa36cc20501e8df5.tar.xz | |
selftests: drv-net: fix RPS mask handling for high CPU numbers
[ Upstream commit cf055f8c000445aa688c53a706ef4f580818eedb ]
The RPS bitmask bounds check uses ~(RPS_MAX_CPUS - 1) which equals ~15 =
0xfff0, only allowing CPUs 0-3.
Change the mask to ~((1UL << RPS_MAX_CPUS) - 1) = ~0xffff to allow CPUs
0-15.
Fixes: 5ebfb4cc3048 ("selftests/net: toeplitz test")
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260112173715.384843-3-gal@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/net/toeplitz.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c index 9ba03164d73a..5099157f01b9 100644 --- a/tools/testing/selftests/net/toeplitz.c +++ b/tools/testing/selftests/net/toeplitz.c @@ -473,8 +473,8 @@ static void parse_rps_bitmap(const char *arg) bitmap = strtoul(arg, NULL, 0); - if (bitmap & ~(RPS_MAX_CPUS - 1)) - error(1, 0, "rps bitmap 0x%lx out of bounds 0..%lu", + if (bitmap & ~((1UL << RPS_MAX_CPUS) - 1)) + error(1, 0, "rps bitmap 0x%lx out of bounds, max cpu %lu", bitmap, RPS_MAX_CPUS - 1); for (i = 0; i < RPS_MAX_CPUS; i++) |