On 9/8/07, Anssi Hannula <[EMAIL PROTECTED]> wrote: > There seem to be changes in sysfs input structure between 2.6.22 and > 2.6.23-rc5 which cause some breakage. > > With 2.6.22: > > > # LC_ALL=C ls -l /sys/class/input/input4 > > total 0 > > drwxr-xr-x 2 root root 0 Sep 8 12:51 capabilities/ > > lrwxrwxrwx 1 root root 0 Sep 8 19:48 device -> > > ../../../devices/platform/pcspkr/ > > drwxr-xr-x 2 root root 0 Sep 8 12:51 event4/ > > drwxr-xr-x 2 root root 0 Sep 8 12:51 id/ > > -r--r--r-- 1 root root 4096 Sep 8 19:48 modalias > > -r--r--r-- 1 root root 4096 Sep 8 19:48 name > > -r--r--r-- 1 root root 4096 Sep 8 19:48 phys > > lrwxrwxrwx 1 root root 0 Sep 8 19:48 subsystem -> ../../../class/input/ > > --w------- 1 root root 4096 Sep 8 19:48 uevent > > -r--r--r-- 1 root root 4096 Sep 8 19:48 uniq > > > # ls -l /sys/class/input/event4 > > lrwxrwxrwx 1 root root 0 Sep 8 19:48 /sys/class/input/event4 -> > > ../../class/input/input4/event4/ > > # ls -l /sys/class/input/event4/ > > total 0 > > -r--r--r-- 1 root root 4096 Sep 8 19:58 dev > > lrwxrwxrwx 1 root root 0 Sep 8 19:58 device -> > > ../../../../devices/platform/pcspkr/ > > lrwxrwxrwx 1 root root 0 Sep 8 19:58 subsystem -> > > ../../../../class/input/ > > --w------- 1 root root 4096 Sep 8 19:58 uevent > > With 2.6.23-rc5: > > > # ls -l /sys/class/input/input5 > > total 0 > > drwxr-xr-x 2 root root 0 Sep 8 19:47 capabilities/ > > lrwxrwxrwx 1 root root 0 Sep 8 19:03 device -> > > ../../../devices/platform/pcspkr/ > > drwxr-xr-x 2 root root 0 Sep 8 19:47 id/ > > lrwxrwxrwx 1 root root 0 Sep 8 19:47 input:event5 -> > > ../../../class/input/event5/ > > -r--r--r-- 1 root root 4096 Sep 8 19:03 modalias > > -r--r--r-- 1 root root 4096 Sep 8 19:03 name > > -r--r--r-- 1 root root 4096 Sep 8 19:47 phys > > drwxr-xr-x 2 root root 0 Sep 8 19:47 power/ > > lrwxrwxrwx 1 root root 0 Sep 8 19:03 subsystem -> ../../../class/input/ > > -rw-r--r-- 1 root root 4096 Sep 8 19:03 uevent > > -r--r--r-- 1 root root 4096 Sep 8 19:47 uniq > > > # ls -l /sys/class/input/event5 > > total 0 > > -r--r--r-- 1 root root 4096 Sep 8 19:03 dev > > lrwxrwxrwx 1 root root 0 Sep 8 19:03 device -> > > ../../../class/input/input5/ > > drwxr-xr-x 2 root root 0 Sep 8 19:48 power/ > > lrwxrwxrwx 1 root root 0 Sep 8 19:03 subsystem -> ../../../class/input/ > > -rw-r--r-- 1 root root 4096 Sep 8 19:03 uevent > > There are a few changes. > > There is no longer: > /sys/class/input/eventX => /sys/class/input/inputX/eventX > instead there is: > /sys/class/inputX/input:eventX => /sys/class/input/eventX > Notice the added "input:". I don't know if any software depends on this, > though. > > However, the change that broke id_path of udev is that > /sys/class/input/event5/device is now a symlink to the inputX directory > instead of being the same as the device symlink in inputX directory, > i.e. to ../../../devices/platform/pcspkr in this case. > > Udev id_path uses that directory to construct the ID_PATH variable. > Should the sysfs structure be reverted or should udev be adapted to > handle traversing /device symlink twice? I think the former, as there > should be considerably more time to adapt udev for coming changes in sysfs.
Udev's path_id script is too dumb to follow the "device" link of stacked class devices in the CONFIG_SYSFS_DEPRECATED=y layout. Does this change fix it for you? http://git.kernel.org/?p=linux/hotplug/udev.git;a=commitdiff_plain;h=b1ac36ff5e3756cefc79967a26280056da31bf6f Thanks, Kay
