From: Christian Marangi ansuelsmth@gmail.com
commit 80248d4160894d7e40b04111bdbaa4ff93fc4bd7 upstream.
On inserting a mdb entry, fdb_search_and_insert is used to add a port to the qca8k target entry in the FDB db.
A FDB entry can't be modified so it needs to be removed and insert again with the new values.
To detect if an entry already exist, the SEARCH operation is used and we check the aging of the entry. If the entry is not 0, the entry exist and we proceed to delete it.
Current code have 2 main problem: - The condition to check if the FDB entry exist is wrong and should be the opposite. - When a FDB entry doesn't exist, aging was never actually set to the STATIC value resulting in allocating an invalid entry.
Fix both problem by adding aging support to the function, calling the function with STATIC as aging by default and finally by correct the condition to check if the entry actually exist.
Fixes: ba8f870dfa63 ("net: dsa: qca8k: add support for mdb_add/del") Signed-off-by: Christian Marangi ansuelsmth@gmail.com Cc: stable@vger.kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/dsa/qca/qca8k-common.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/net/dsa/qca/qca8k-common.c +++ b/drivers/net/dsa/qca/qca8k-common.c @@ -281,7 +281,7 @@ void qca8k_fdb_flush(struct qca8k_priv * }
static int qca8k_fdb_search_and_insert(struct qca8k_priv *priv, u8 port_mask, - const u8 *mac, u16 vid) + const u8 *mac, u16 vid, u8 aging) { struct qca8k_fdb fdb = { 0 }; int ret; @@ -298,10 +298,12 @@ static int qca8k_fdb_search_and_insert(s goto exit;
/* Rule exist. Delete first */ - if (!fdb.aging) { + if (fdb.aging) { ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1); if (ret) goto exit; + } else { + fdb.aging = aging; }
/* Add port to fdb portmask */ @@ -847,7 +849,8 @@ int qca8k_port_mdb_add(struct dsa_switch const u8 *addr = mdb->addr; u16 vid = mdb->vid;
- return qca8k_fdb_search_and_insert(priv, BIT(port), addr, vid); + return qca8k_fdb_search_and_insert(priv, BIT(port), addr, vid, + QCA8K_ATU_STATUS_STATIC); }
int qca8k_port_mdb_del(struct dsa_switch *ds, int port,