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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-04-29 17:07:59 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-06-22 19:58:19 +0300 |
| commit | c64c3f3ac63a101a00bd316eaba63d359e9ba215 (patch) | |
| tree | 7bdf8c62b239795d5cd86ee1cd9d369084770187 /drivers/thunderbolt/path.c | |
| parent | 69eb79f7d294f92696de8010432758dbd3d1ecb3 (diff) | |
| download | linux-c64c3f3ac63a101a00bd316eaba63d359e9ba215.tar.xz | |
thunderbolt: Make tb_path_alloc() work with tree topologies
With USB4, topologies are not limited to daisy-chains anymore so when
calculating how many hops are between two ports we need to walk the
whole path instead.
Add helper function tb_for_each_port_on_path() that can be used to walk
over each port on a path and make tb_path_alloc() to use it.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/path.c')
| -rw-r--r-- | drivers/thunderbolt/path.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/thunderbolt/path.c b/drivers/thunderbolt/path.c index ad58559ea88e..77abb1fa80c0 100644 --- a/drivers/thunderbolt/path.c +++ b/drivers/thunderbolt/path.c @@ -239,12 +239,12 @@ struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid, if (!path) return NULL; - /* - * Number of hops on a path is the distance between the two - * switches plus the source adapter port. - */ - num_hops = abs(tb_route_length(tb_route(src->sw)) - - tb_route_length(tb_route(dst->sw))) + 1; + i = 0; + tb_for_each_port_on_path(src, dst, in_port) + i++; + + /* Each hop takes two ports */ + num_hops = i / 2; path->hops = kcalloc(num_hops, sizeof(*path->hops), GFP_KERNEL); if (!path->hops) { |