From 24751e29fe313105c9dd5f9d1f27028c553381f6 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Mon, 3 Aug 2015 09:17:44 -0400 Subject: [PATCH] net: dsa: mv88e6xxx: call _mv88e6xxx_stats_wait with SMI lock held At switch setup, _mv88e6xxx_stats_wait was called without holding the SMI mutex. Fix this by requesting the lock for this call. Also, return the _mv88e6xxx_stats_wait code, since it may fail. Signed-off-by: Vivien Didelot Reviewed-by: Guenter Roeck Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 61ce4cf120a6..109452056eff 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -1881,6 +1881,7 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds) int mv88e6xxx_setup_global(struct dsa_switch *ds) { struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; int i; /* Set the default address aging time to 5 minutes, and @@ -1979,9 +1980,11 @@ int mv88e6xxx_setup_global(struct dsa_switch *ds) REG_WRITE(REG_GLOBAL, GLOBAL_STATS_OP, GLOBAL_STATS_OP_FLUSH_ALL); /* Wait for the flush to complete. */ - _mv88e6xxx_stats_wait(ds); + mutex_lock(&ps->smi_mutex); + ret = _mv88e6xxx_stats_wait(ds); + mutex_unlock(&ps->smi_mutex); - return 0; + return ret; } int mv88e6xxx_switch_reset(struct dsa_switch *ds, bool ppu_active)