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| author | Yu Watanabe <watanabe.yu+github@gmail.com> | 2021-12-06 16:05:35 +0900 |
|---|---|---|
| committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2021-12-06 16:06:04 +0900 |
| commit | 6885a857e4071536d3e378f0bf41c02e959a7681 (patch) | |
| tree | 63ee90c6a3662d1fbecbe9a00e465c971da1654c | |
| parent | 56615f203bf78684d05828c2718325016f0d025f (diff) | |
| download | systemd-6885a857e4071536d3e378f0bf41c02e959a7681.tar.gz | |
udev/path-id: comment why USB host number is dropped from the PATH_ID
Closes #21617.
The comment is borrowed from https://github.com/systemd/systemd/pull/21620#discussion_r762521508.
| -rw-r--r-- | src/udev/udev-builtin-path_id.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c index 9f71fadeea..6fdd3eceea 100644 --- a/src/udev/udev-builtin-path_id.c +++ b/src/udev/udev-builtin-path_id.c @@ -503,6 +503,10 @@ static sd_device *handle_usb(sd_device *parent, char **path) { return parent; port++; + /* USB host number may change across reboots (and probably even without reboot). The part after + * USB host number is determined by device topology and so does not change. Hence, drop the + * host number and always use '0' instead. */ + path_prepend(path, "usb-0:%s", port); return skip_subsystem(parent, "usb"); } |