[PATCH net-next v2 1/6] net: dsa: mv88e6xxx: protect SID register access
From: Vivien Didelot <hidden>
Date: 2016-03-31 20:57:22
Also in:
lkml
Subsystem:
networking drivers, networking [dsa], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
Introduce a mv88e6xxx_has_stu() helper to protect the access to the GLOBAL_VTU_SID register, instead of checking switch families. Signed-off-by: Vivien Didelot <redacted> --- drivers/net/dsa/mv88e6xxx.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index fa086e0..19a8208 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c@@ -482,6 +482,16 @@ static bool mv88e6xxx_6352_family(struct dsa_switch *ds) return false; } +static bool mv88e6xxx_has_stu(struct dsa_switch *ds) +{ + /* Does the device have STU and dedicated SID registers for VTU ops? */ + if (mv88e6xxx_6097_family(ds) || mv88e6xxx_6165_family(ds) || + mv88e6xxx_6351_family(ds) || mv88e6xxx_6352_family(ds)) + return true; + + return false; +} + /* We expect the switch to perform auto negotiation if there is a real * phy. However, in the case of a fixed link phy, we force the port * settings from the fixed link settings.
@@ -1329,7 +1339,9 @@ static int _mv88e6xxx_vtu_getnext(struct dsa_switch *ds, return ret; next.fid = ret & GLOBAL_VTU_FID_MASK; + } + if (mv88e6xxx_has_stu(ds)) { ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_VTU_SID); if (ret < 0)
@@ -1412,8 +1424,7 @@ static int _mv88e6xxx_vtu_loadpurge(struct dsa_switch *ds, if (ret < 0) return ret; - if (mv88e6xxx_6097_family(ds) || mv88e6xxx_6165_family(ds) || - mv88e6xxx_6351_family(ds) || mv88e6xxx_6352_family(ds)) { + if (mv88e6xxx_has_stu(ds)) { reg = entry->sid & GLOBAL_VTU_SID_MASK; ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_VTU_SID, reg); if (ret < 0)
--
2.7.4