xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

thunderbolt: Scan only valid NULL adapter ports in hotplug

Browse Source 
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>
This commit is contained in:
Mika Westerberg
2017-10-11 17:19:54 +03:00
parent 99cabbb006
commit 344e06430a
2 changed files with 11 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/thunderbolt/tb.c
View File

@@ -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: