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net: mvpp2: cls: fix less than zero check on a u32 variable 

The signed return from the call to mvpp2_cls_c2_port_flow_index is being
assigned to the u32 variable c2.index and then checked for a negative
error condition which is always going to be false. Fix this by assigning
the return to the int variable index and checking this instead.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: 90b509b39a ("net: mvpp2: cls: Add Classification offload support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Colin Ian King 2019-05-05 22:38:14 +01:00 committed by David S. Miller
parent a97f4fe6e1
commit d4ee7f195e
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
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@ -1029,12 +1029,14 @@ static int mvpp2_port_c2_tcam_rule_add(struct mvpp2_port *port,
struct flow_action_entry *act;
struct mvpp2_cls_c2_entry c2;
u8 qh, ql, pmap;
int index;
memset(&c2, 0, sizeof(c2));
c2.index = mvpp2_cls_c2_port_flow_index(port, rule->loc);
if (c2.index < 0)
index = mvpp2_cls_c2_port_flow_index(port, rule->loc);
if (index < 0)
return -EINVAL;
c2.index = index;
act = &rule->flow->action.entries[0];