Commit cf055f8c authored by Gal Pressman's avatar Gal Pressman Committed by Jakub Kicinski
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selftests: drv-net: fix RPS mask handling for high CPU numbers 



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: 5ebfb4cc ("selftests/net: toeplitz test")
Reviewed-by: default avatarNimrod Oren <noren@nvidia.com>
Signed-off-by: default avatarGal Pressman <gal@nvidia.com>
Reviewed-by: default avatarWillem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260112173715.384843-3-gal@nvidia.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 9d48c62f

tools/testing/selftests/drivers/net/hw/toeplitz.c

+2 −2
Original line number Diff line number Diff line
@@ -485,8 +485,8 @@ 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++)