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sound: include ALSA sound card id in /dev/snd/by-id/ links

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If two USB sound cards that have the same serial number are plugged in
make sure the by-id/ device node symlink is unique at least during
runtime, by including the ALSA card id in the symlink name.

This is a followup to ed1b2d9fc7.
This commit is contained in:
Lennart Poettering
2009-11-09 22:11:29 +01:00
parent 4e3664f22b
commit 68bffc607f
1 changed files with 3 additions and 3 deletions
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rules/rules.d/60-persistent-alsa.rules
+3 -3
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@@ -5,9 +5,9 @@ SUBSYSTEM!="sound", GOTO="persistent_alsa_end"
KERNEL!="controlC[0-9]*", GOTO="persistent_alsa_end"
SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{program}="usb_id --export %p"
SUBSYSTEMS=="usb", ENV{ID_IFACE}="$attr{bInterfaceNumber}"
ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="?*", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_IFACE}"
ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}!="", ENV{ID_IFACE}="$attr{bInterfaceNumber}"
ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="?*", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_IFACE}-$attr{../id}"
ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$attr{../id}"
ENV{ID_PATH}=="", IMPORT{program}="path_id %p"
ENV{ID_PATH}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH}"