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enetc: Fix VID/mcast address hash calculation

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The hash is calculated by XOR-ing together bits of the VID.
Prepend a statement with "!!" to make sure that we're get bit 0
on both sides of the equation.

Obtained from: Semihalf
Sponsored by: Alstom Group
This commit is contained in:
Kornel Duleba 2021-11-30 09:23:29 +01:00 committed by Wojciech Macek
parent 49c2c62889
commit b3d4891af0
1 changed files with 2 additions and 2 deletions
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4
sys/dev/enetc/if_enetc.c
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@ -811,7 +811,7 @@ enetc_hash_mac(void *arg, struct sockaddr_dl *sdl, u_int cnt)
for (i = 0; i < 6; i++) {
bit = 0;
for (j = 0; j < 8; j++)
bit ^= address & BIT(i + j*6);
bit ^= !!(address & BIT(i + j*6));
hash |= bit << i;
}
@ -852,7 +852,7 @@ enetc_hash_vid(uint16_t vid)
for (i = 0;i < 6;i++) {
bit = vid & BIT(i);
bit ^= vid & BIT(i + 6);
bit ^= !!(vid & BIT(i + 6));
hash |= bit << i;
}