udev: Fix sound.target dependency

The recent bug report indicated a race at device creation and the
sound.target dependencies, and the cause turned out to be the condition
of the sound.target trigger.  Currently it's set for "card*", but this
is actually the parent object; i.e. the sound.target is triggered before
the sound devices are created.

For assuring the whole sound device creations beforehand, we need to use
"controlC*" instead of "card*"; as already described in
78-sound-card.rules, this is guaranteed to be the last device, and can
be used as a synchronization point.

BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1179363
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/rules.d/99-systemd.rules.in b/rules.d/99-systemd.rules.in
index d2f595d18ee08c2cc8099a1fd1df349caff8f967..7c22eefdb724d84287109822df9042809a3831ca 100644 (file)
--- a/rules.d/99-systemd.rules.in
+++ b/rules.d/99-systemd.rules.in
@@ -51,7 +51,7 @@ SUBSYSTEM=="bluetooth", TAG+="systemd", ENV{SYSTEMD_ALIAS}+="/sys/subsystem/blue
 
 SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ENV{ID_USB_INTERFACES}=="*:0b????:*", ENV{ID_SMARTCARD_READER}="1"
 ENV{ID_SMARTCARD_READER}=="?*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="smartcard.target", ENV{SYSTEMD_USER_WANTS}+="smartcard.target"
-SUBSYSTEM=="sound", KERNEL=="card*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="sound.target", ENV{SYSTEMD_USER_WANTS}+="sound.target"
+SUBSYSTEM=="sound", KERNEL=="controlC*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="sound.target", ENV{SYSTEMD_USER_WANTS}+="sound.target"
 
 SUBSYSTEM=="printer", TAG+="systemd", ENV{SYSTEMD_WANTS}+="printer.target", ENV{SYSTEMD_USER_WANTS}+="printer.target"
 SUBSYSTEM=="usb", KERNEL=="lp*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="printer.target", ENV{SYSTEMD_USER_WANTS}+="printer.target"