Re: [PATCH] net: dsa: fix mv88e6xxx switches

On Sat, Jan 23, 2016 at 09:16:47PM +0100, Andrew Lunn wrote:

On Sat, Jan 23, 2016 at 07:48:57PM +0000, Russell King - ARM Linux wrote:

quoted

On Sat, Jan 23, 2016 at 08:37:05PM +0100, Andrew Lunn wrote:

quoted

I'm testing on a 6172. But 6172 and 6176 are both in the same family
6352, and share the same driver.

Hmm, can't be that then.

quoted

So you initially have lan1 in an bridge. I don't.

Running tcpdump on the device i'm trying to ping, there are ARP
requests and replies. But the replies are never received by the
target, arp -a shows <incomplete>.

Looking at the stats counters in debugfs, the packets are counted in
in_unicast, but also sw_in_filtered.

Port 0 is lan0 and port 5 is the cpu port.

root@370-rd:/sys/kernel/debug/dsa0# cat regs
    GLOBAL GLOBAL2 SERDES   0    1    2    3    4    5    6  
 0:  c874       0    1940  1d0f 1d0f 1d0f 1d0f 100f  e07    6 
 1:   fa0       0     149     3    3    3    3    3 c03e    3 
 2:   fa0    ffff     141     0    0    0    0    0    0    0 
 3:     0    ffff     ea1  1721 1721 1721 1721 1721 1721 1721 
 4:  6000     258     1e0   433  433  433  433  433 373f  433 
 5:  3000      ff       0     0    0    0    0    0    0    0 
 6:   fa0    1f0f       4    7f   7e   7d   7c   7b   7a   79 
 7:  3331    707f    2001     0  fa1  fa2  fa3  fa4    0  fa6 

This shows port 0 is on vlan 0, but it should default to vlan 1 when
no vlans are configured.  The patch below should at least allow some
diagnosis of what's being requested, and when.

diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index a43354ed0607..8a9cf67eb16d 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c

@@ -1511,6 +1511,9 @@ int mv88e6xxx_port_vlan_add(struct dsa_switch *ds, int port,
 	u16 vid;
 	int err = 0;
 
+	printk("%s: port %d vid %u-%u flags %x\n",
+		__func__, port, vlan->vid_begin, vlan->vid_end, vlan->flags);
+
 	mutex_lock(&ps->smi_mutex);
 
 	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {

-- 
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