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authorVivien Didelot <vivien.didelot@savoirfairelinux.com>2017-01-27 15:29:36 -0500
committerDavid S. Miller <davem@davemloft.net>2017-01-29 18:42:46 -0500
commita0c02161ecfc2f40a0837926efac5376bc6fd6d3 (patch)
treef92b3c15cc967474f75c35d91f0450c5970e8fb9 /net/dsa/dsa2.c
parent1f5d492a34311545b87d223c7fc1d531c610a410 (diff)
net: dsa: variable number of ports
Change the ports[DSA_MAX_PORTS] array of the dsa_switch structure for a zero-length array, allocated at the same time as the dsa_switch structure itself. A dsa_switch_alloc() helper is provided for that. This commit brings no functional change yet since we pass DSA_MAX_PORTS as the number of ports for the moment. Future patches can update the DSA drivers separately to support dynamic number of ports. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa/dsa2.c')
-rw-r--r--net/dsa/dsa2.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 75f5d1f8554b..4b3a44bec5c8 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -666,6 +666,22 @@ out:
return err;
}
+struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n)
+{
+ size_t size = sizeof(struct dsa_switch) + n * sizeof(struct dsa_port);
+ struct dsa_switch *ds;
+
+ ds = devm_kzalloc(dev, size, GFP_KERNEL);
+ if (!ds)
+ return NULL;
+
+ ds->dev = dev;
+ ds->num_ports = n;
+
+ return ds;
+}
+EXPORT_SYMBOL_GPL(dsa_switch_alloc);
+
int dsa_register_switch(struct dsa_switch *ds, struct device *dev)
{
int err;