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igc: correctly update RCTL when changing multicast filters.

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Fix clearing of bits in RCTL for the non-bpf/non-allmulti case.
Update RCTL after modifying the multicast filter registers as per
the Linux driver.

This fixes LACP on igc interfaces, where incoming LACP multicasti
control packets were being dropped.

Reviewed by:	kbowling
Obtained from:	Rubicon Communications, LLC ("Netgate")
MFC after:	3 days
Differential Revision: https://reviews.freebsd.org/D32574
This commit is contained in:
Peter Grehan 2021-10-12 03:49:01 +10:00
parent 3dc7a1897e
commit 5a3eb6207a
1 changed files with 3 additions and 3 deletions
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6
sys/dev/igc/if_igc.c
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@ -1172,12 +1172,12 @@ igc_if_multi_set(if_ctx_t ctx)
reg_rctl |= IGC_RCTL_MPE;
reg_rctl &= ~IGC_RCTL_UPE;
} else
reg_rctl = ~(IGC_RCTL_UPE | IGC_RCTL_MPE);
IGC_WRITE_REG(&adapter->hw, IGC_RCTL, reg_rctl);
reg_rctl &= ~(IGC_RCTL_UPE | IGC_RCTL_MPE);
if (mcnt < MAX_NUM_MULTICAST_ADDRESSES)
igc_update_mc_addr_list(&adapter->hw, mta, mcnt);
IGC_WRITE_REG(&adapter->hw, IGC_RCTL, reg_rctl);
}
/*********************************************************************