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udev: permanent symlinks with USB revision for /dev/media*

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As a follow-up in the style of:
  873be895ed ("udev: add USB revision in ID_PATH")
this patch adds a second symlink for media controllers, this time
including the USB revision.

This means that in addition to persistent symlinks like:
  pci-0000:04:00.3-usb-0:1:1.0-media-controller -> ../../media0

We now also get:
  pci-0000:04:00.3-usbv2-0:1:1.0-media-controller -> ../../media0

...which helps distinguish media devices plugged into different USB root
hubs provided by the same PCI card, at least as long as they are for
different USB revisions.

Fixes: 04f19d6735 ("udev: Add /dev/media/by-path symlinks for media controllers")
This commit is contained in:
Max Staudt 2024-04-17 15:30:44 +09:00 committed by Luca Boccassi
parent ef5f7f9437
commit 8416dc8bca
1 changed files with 2 additions and 1 deletions
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3
rules.d/60-persistent-media-controller.rules
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@ -7,6 +7,7 @@ SUBSYSTEM!="media", GOTO="persistent_media_ctl_end"
ENV{MAJOR}=="", GOTO="persistent_media_ctl_end"
IMPORT{builtin}="path_id"
ENV{ID_PATH}=="?*", KERNEL=="media*", SYMLINK+="media/by-path/$env{ID_PATH}-media-controller"
KERNEL=="media*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="media/by-path/$env{ID_PATH_WITH_USB_REVISION}-media-controller"
KERNEL=="media*", ENV{ID_PATH_WITH_USB_REVISION}=="", ENV{ID_PATH}=="?*", SYMLINK+="media/by-path/$env{ID_PATH}-media-controller"
LABEL="persistent_media_ctl_end"