diff options
| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2017-10-11 17:19:54 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-04-18 11:18:53 +0300 |
| commit | 344e06430a72347b554a7fd98f3a961084f37be6 (patch) | |
| tree | 749030b9462451e58673e0ceb987be245d26c978 /drivers/thunderbolt | |
| parent | thunderbolt: Add support for full PCIe daisy chains (diff) | |
| download | linux-dev-344e06430a72347b554a7fd98f3a961084f37be6.tar.xz linux-dev-344e06430a72347b554a7fd98f3a961084f37be6.zip | |
thunderbolt: Scan only valid NULL adapter ports in hotplug
The only way to expand Thunderbolt topology is through the NULL adapter
ports (typically ports 1, 2, 3 and 4). There is no point handling
Thunderbolt hotplug events on any other port.
Add a helper function (tb_port_is_null()) that can be used to determine
if the port is NULL port, and use it in software connection manager code
when hotplug event is handled.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 10 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.h | 5 |
2 files changed, 11 insertions, 4 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index cfc451c938fd..fb01396a62a9 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -356,10 +356,12 @@ static void tb_handle_hotplug(struct work_struct *work) tb_port_info(port, "got plug event for connected port, ignoring\n"); } else { - tb_port_info(port, "hotplug: scanning\n"); - tb_scan_port(port); - if (!port->remote) - tb_port_info(port, "hotplug: no switch found\n"); + if (tb_port_is_null(port)) { + tb_port_info(port, "hotplug: scanning\n"); + tb_scan_port(port); + if (!port->remote) + tb_port_info(port, "hotplug: no switch found\n"); + } } put_sw: diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 5b5ba8919086..260360ec59a9 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -350,6 +350,11 @@ static inline bool tb_port_has_remote(const struct tb_port *port) return true; } +static inline bool tb_port_is_null(const struct tb_port *port) +{ + return port && port->port && port->config.type == TB_TYPE_PORT; +} + static inline bool tb_port_is_pcie_down(const struct tb_port *port) { return port && port->config.type == TB_TYPE_PCIE_DOWN; |