diff options
| author | Florian Fainelli <f.fainelli@gmail.com> | 2015-09-05 13:07:27 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-03 13:49:14 +0200 |
| commit | 0f5262e8ddb6e7264724de0d9ec220d13b2ef1ff (patch) | |
| tree | ba8def4a272ade8d638195bfe274f9eb678618cf | |
| parent | 5008d77ef8b27c8c464e35d290ec4fa3adb5f9e1 (diff) | |
net: dsa: bcm_sf2: Fix ageing conditions and operation
[ Upstream commit 39797a279d62972cd914ef580fdfacb13e508bf8 ]
The comparison check between cur_hw_state and hw_state is currently
invalid because cur_hw_state is right shifted by G_MISTP_SHIFT, while
hw_state is not, so we end-up comparing bits 2:0 with bits 7:5, which is
going to cause an additional aging to occur. Fix this by not shifting
cur_hw_state while reading it, but instead, mask the value with the
appropriately shitfted bitmask.
The other problem with the fast-ageing process is that we did not set
the EN_AGE_DYNAMIC bit to request the ageing to occur for dynamically
learned MAC addresses. Finally, write back 0 to the FAST_AGE_CTRL
register to avoid leaving spurious bits sets from one operation to the
other.
Fixes: 12f460f23423 ("net: dsa: bcm_sf2: add HW bridging support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/dsa/bcm_sf2.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index cedb572bf25a..f24c4febd85d 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -417,7 +417,7 @@ static int bcm_sf2_sw_fast_age_port(struct dsa_switch *ds, int port) core_writel(priv, port, CORE_FAST_AGE_PORT); reg = core_readl(priv, CORE_FAST_AGE_CTRL); - reg |= EN_AGE_PORT | FAST_AGE_STR_DONE; + reg |= EN_AGE_PORT | EN_AGE_DYNAMIC | FAST_AGE_STR_DONE; core_writel(priv, reg, CORE_FAST_AGE_CTRL); do { @@ -431,6 +431,8 @@ static int bcm_sf2_sw_fast_age_port(struct dsa_switch *ds, int port) if (!timeout) return -ETIMEDOUT; + core_writel(priv, 0, CORE_FAST_AGE_CTRL); + return 0; } @@ -506,7 +508,7 @@ static int bcm_sf2_sw_br_set_stp_state(struct dsa_switch *ds, int port, u32 reg; reg = core_readl(priv, CORE_G_PCTL_PORT(port)); - cur_hw_state = reg >> G_MISTP_STATE_SHIFT; + cur_hw_state = reg & (G_MISTP_STATE_MASK << G_MISTP_STATE_SHIFT); switch (state) { case BR_STATE_DISABLED: @@ -530,10 +532,12 @@ static int bcm_sf2_sw_br_set_stp_state(struct dsa_switch *ds, int port, } /* Fast-age ARL entries if we are moving a port from Learning or - * Forwarding state to Disabled, Blocking or Listening state + * Forwarding (cur_hw_state) state to Disabled, Blocking or Listening + * state (hw_state) */ if (cur_hw_state != hw_state) { - if (cur_hw_state & 4 && !(hw_state & 4)) { + if (cur_hw_state >= G_MISTP_LEARN_STATE && + hw_state <= G_MISTP_LISTEN_STATE) { ret = bcm_sf2_sw_fast_age_port(ds, port); if (ret) { pr_err("%s: fast-ageing failed\n", __func__); |