From 308173546ac4342103541e8d4e4ce83d1a5e7eba Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Mon, 6 Nov 2017 16:11:52 -0500 Subject: [PATCH] net: dsa: setup a tree when adding a switch to it Now that the tree setup is centralized, we can simplify the code a bit more by setting up or tearing down the tree directly when adding or removing a switch to/from it. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- net/dsa/dsa2.c | 35 ++++++++++++++++------------------- 1 file changed, 16 insertions(+), 19 deletions(-) diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index 44d26b5977cd..3db50e68640e 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -489,6 +489,8 @@ static void dsa_tree_teardown(struct dsa_switch_tree *dst) static void dsa_tree_remove_switch(struct dsa_switch_tree *dst, unsigned int index) { + dsa_tree_teardown(dst); + dst->ds[index] = NULL; dsa_tree_put(dst); } @@ -497,6 +499,7 @@ static int dsa_tree_add_switch(struct dsa_switch_tree *dst, struct dsa_switch *ds) { unsigned int index = ds->index; + int err; if (dst->ds[index]) return -EBUSY; @@ -504,7 +507,11 @@ static int dsa_tree_add_switch(struct dsa_switch_tree *dst, dsa_tree_get(dst); dst->ds[index] = ds; - return 0; + err = dsa_tree_setup(dst); + if (err) + dsa_tree_remove_switch(dst, index); + + return err; } static int dsa_port_parse_user(struct dsa_port *dp, const char *name) @@ -704,12 +711,17 @@ static int dsa_switch_parse(struct dsa_switch *ds, struct dsa_chip_data *cd) return dsa_switch_parse_ports(ds, cd); } +static int dsa_switch_add(struct dsa_switch *ds) +{ + struct dsa_switch_tree *dst = ds->dst; + + return dsa_tree_add_switch(dst, ds); +} + static int _dsa_register_switch(struct dsa_switch *ds) { struct dsa_chip_data *pdata = ds->dev->platform_data; struct device_node *np = ds->dev->of_node; - struct dsa_switch_tree *dst; - unsigned int index; int err; if (np) @@ -722,20 +734,7 @@ static int _dsa_register_switch(struct dsa_switch *ds) if (err) return err; - index = ds->index; - dst = ds->dst; - - err = dsa_tree_add_switch(dst, ds); - if (err) - return err; - - err = dsa_tree_setup(dst); - if (err) { - dsa_tree_teardown(dst); - dsa_tree_remove_switch(dst, index); - } - - return err; + return dsa_switch_add(ds); } struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n) @@ -777,8 +776,6 @@ static void _dsa_unregister_switch(struct dsa_switch *ds) struct dsa_switch_tree *dst = ds->dst; unsigned int index = ds->index; - dsa_tree_teardown(dst); - dsa_tree_remove_switch(dst, index); } -- 2.34.1