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authorGuenter Roeck <linux@roeck-us.net>2015-02-24 23:02:02 -0800
committerDavid S. Miller <davem@davemloft.net>2015-02-25 17:57:48 -0500
commitd79d21073626cf022943e5c4c10a97cdf7cb8465 (patch)
tree529fa340e3b007cce36bb7665f1eef4807bdb5b4 /include/net/dsa.h
parentbb66be1c549a0760500cfad404b3d79a136d0e44 (diff)
downloadlinux-d79d21073626cf022943e5c4c10a97cdf7cb8465.tar.bz2
net: dsa: Introduce dsa_is_port_initialized
To avoid race conditions when using the ds->ports[] array, we need to check if the accessed port has been initialized. Introduce and use helper function dsa_is_port_initialized for that purpose and use it where needed. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/dsa.h')
-rw-r--r--include/net/dsa.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 92be34791963..c542c131d551 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -165,6 +165,11 @@ static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
}
+static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
+{
+ return ds->phys_port_mask & (1 << p) && ds->ports[p];
+}
+
static inline u8 dsa_upstream_port(struct dsa_switch *ds)
{
struct dsa_switch_tree *dst = ds->dst;