Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-12 23:23:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

net: dsa: Define max num of bridges in tag8021q implementation

Browse Source 
Max number of bridges in tag8021q implementation is strictly limited
by VBID size: 3 bits. But zero is reserved and only 7 values can be used.

This patch adds define which describe maximum possible value.

Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://patch.msgid.link/20240713211620.1125910-10-paweldembicki@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Pawel Dembicki 2024-07-13 23:16:15 +02:00 committed by Jakub Kicinski
parent e3386ec4ec
commit ce20fdd670
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/dsa/sja1105/sja1105_main.c
View File

@ -3167,8 +3167,7 @@ static int sja1105_setup(struct dsa_switch *ds)
ds->vlan_filtering_is_global = true;
ds->untag_bridge_pvid = true;
ds->fdb_isolation = true;
/* tag_8021q has 3 bits for the VBID, and the value 0 is reserved */
ds->max_num_bridges = 7;
ds->max_num_bridges = DSA_TAG_8021Q_MAX_NUM_BRIDGES;
/* Advertise the 8 egress queues */
ds->num_tx_queues = SJA1105_NUM_TC;

5
include/linux/dsa/8021q.h
View File

@ -8,6 +8,11 @@
#include <net/dsa.h>
#include <linux/types.h>
/* VBID is limited to three bits only and zero is reserved.
* Only 7 bridges can be enumerated.
*/
#define DSA_TAG_8021Q_MAX_NUM_BRIDGES 7
int dsa_tag_8021q_register(struct dsa_switch *ds, __be16 proto);
void dsa_tag_8021q_unregister(struct dsa_switch *ds);