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sfc: fix attempt to translate invalid filter ID 

When filter insertion fails with no rollback, we were trying to convert
 EFX_EF10_FILTER_ID_INVALID to an id to store in 'ids' (which is either
 vlan->uc or vlan->mc).  This would WARN_ON_ONCE and then record a bogus
 filter ID of 0x1fff, neither of which is a good thing.

Fixes: 0ccb998bf4 ("sfc: fix filter_id misinterpretation in edge case")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree 2017-06-29 16:50:06 +01:00 committed by David S. Miller
parent e44699d2c2
commit d58299a478
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/sfc/ef10.c
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@ -5105,6 +5105,7 @@ static int efx_ef10_filter_insert_addr_list(struct efx_nic *efx,
/* Insert/renew filters */
for (i = 0; i < addr_count; i++) {
EFX_WARN_ON_PARANOID(ids[i] != EFX_EF10_FILTER_ID_INVALID);
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO, filter_flags, 0);
efx_filter_set_eth_local(&spec, vlan->vid, addr_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
@ -5122,11 +5123,11 @@ static int efx_ef10_filter_insert_addr_list(struct efx_nic *efx,
}
return rc;
} else {
/* mark as not inserted, and carry on */
rc = EFX_EF10_FILTER_ID_INVALID;
/* keep invalid ID, and carry on */
}
} else {
ids[i] = efx_ef10_filter_get_unsafe_id(rc);
}
ids[i] = efx_ef10_filter_get_unsafe_id(rc);
}
if (multicast && rollback) {