korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-26 21:54:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

thunderbolt: Do not resume routers if UID is not set

Browse Source 
Routers might not have a UID set if the DROM read failed during
initialization previously.

Normally upon resume the UID is re-read to confirm it's the same
device connected.
* If the DROM read failed during init but then succeeded during
  resume it could either be a new device or faulty device
* If the DROM read failed during init and also failed during resume
  it might be a different device plugged in all together.

Detect this situation and prevent re-using the same configuration in
these cirucmstances.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mario Limonciello 2022-03-03 07:13:25 -06:00 committed by Mika Westerberg
parent e87491a9fd
commit a283de3ec6
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/thunderbolt/switch.c
View File

@ -2980,6 +2980,10 @@ int tb_switch_resume(struct tb_switch *sw)
return err;
}
/* We don't have any way to confirm this was the same device */
if (!sw->uid)
return -ENODEV;
if (tb_switch_is_usb4(sw))
err = usb4_switch_read_uid(sw, &uid);
else