X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=rules%2Frules.d%2F60-persistent-alsa.rules;h=624f57adec09b22ca0db5924975b668c17cb0bdd;hb=68bffc607f7f0414fee77fa481d9c133ce0798e9;hp=a5206fdbb15a1b794dde55774390793e8c8362d3;hpb=4e3664f22b39c3efa33f5778a651a083b5e1f544;p=elogind.git

diff --git a/rules/rules.d/60-persistent-alsa.rules b/rules/rules.d/60-persistent-alsa.rules
index a5206fdbb..624f57ade 100644
--- a/rules/rules.d/60-persistent-alsa.rules
+++ b/rules/rules.d/60-persistent-alsa.rules
@@ -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}"