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dpaa2-switch: fix default return of dpaa2_switch_flower_parse_mirror_key

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commit 2a36ed7c1c upstream.

Clang static analysis reports this representative problem
dpaa2-switch-flower.c:616:24: warning: The right operand of '=='
  is a garbage value
  tmp->cfg.vlan_id == vlan) {
                   ^  ~~~~
vlan is set in dpaa2_switch_flower_parse_mirror_key(). However
this function can return success without setting vlan.  So
change the default return to -EOPNOTSUPP.

Fixes: 0f3faece58 ("dpaa2-switch: add VLAN based mirroring")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tom Rix
2022-02-14 07:41:39 -08:00
committed by Greg Kroah-Hartman
parent 1a16f04794
commit d3c9dd36ec
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
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@@ -532,6 +532,7 @@ static int dpaa2_switch_flower_parse_mirror_key(struct flow_cls_offload *cls,
struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
struct flow_dissector *dissector = rule->match.dissector;
struct netlink_ext_ack *extack = cls->common.extack;
int ret = -EOPNOTSUPP;
if (dissector->used_keys &
~(BIT(FLOW_DISSECTOR_KEY_BASIC) |
@@ -561,9 +562,10 @@ static int dpaa2_switch_flower_parse_mirror_key(struct flow_cls_offload *cls,
}
*vlan = (u16)match.key->vlan_id;
ret = 0;
}
return 0;
return ret;
}
static int