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openvswitch: Fix ovs_flow_free() ovs-lock assert.

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ovs_flow_free() is not called under ovs-lock during packet
execute path (ovs_packet_cmd_execute()). Since packet execute
does not touch flow->mask, there is no need to take that
lock either. So move assert in case where flow->mask is checked.

Found by code inspection.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar 2014-01-31 09:43:23 -08:00 • committed by Jesse Gross
parent 45fb9c35b2
commit e4c6d75954
1 changed files with 4 additions and 2 deletions
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6
net/openvswitch/flow_table.c
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@ -158,11 +158,13 @@ void ovs_flow_free(struct sw_flow *flow, bool deferred)
if (!flow) if (!flow)
return; return;
ASSERT_OVSL();
if (flow->mask) { if (flow->mask) {
struct sw_flow_mask *mask = flow->mask; struct sw_flow_mask *mask = flow->mask;
/* ovs-lock is required to protect mask-refcount and
* mask list.
*/
ASSERT_OVSL();
BUG_ON(!mask->ref_count); BUG_ON(!mask->ref_count);
mask->ref_count--; mask->ref_count--;