On Tue, Aug 23, 2011 at 11:15 AM, Tom Gundersen <teg@xxxxxxx> wrote:
> ATTRS matches on a parent device, two instances of ATTRS matches on
> _the same_ parent device. In your case I guess idVendor and serial
> match on different parent devices, which would explain why they work
> separately but no together.
Eventually I found a documentation that mentions this, but in was not
easy. A very stable difference, hard to understand (now documented in
this archive!). Thanks!
> Sounds to me like you should have used:
>
> KERNEL=="hidraw[0-9]*", ATTR{idVendor}=="c1ca",
> ATTRS{serial}=="musb_hdrc", SYMLINK+="eeeeeeeee"
KERNEL=="hidraw[0-9]*", ATTR{idVendor}=="c1ca", SYMLINK+="1111111"
KERNEL=="hidraw[0-9]*", ATTRS{idVendor}=="c1ca", SYMLINK+="2222222"
KERNEL=="hidraw[0-9]*", ATTRS{serial}=="musb_hdrc", SYMLINK+="3333333"
KERNEL=="hidraw[0-9]*", ATTR{idVendor}=="c1ca",
ATTRS{serial}=="musb_hdrc", SYMLINK+="4444444"
[/root 10.10.10.44] $ udevadm test /sys/class/hidraw/hidraw0 2>&1 | grep DEV
UDEV_LOG=6
DEVPATH=/devices/platform/musb_hdrc/usb1/1-1/1-1.1/1-1.1:1.0/0003:C1CA:0003.0008/hidraw/hidraw0
DEVNAME=/dev/hidraw0
DEVLINKS=/dev/2222222 /dev/3333333
[/root 10.10.10.44] $ udevadm info --query=all --name=/dev/hidraw0
--attribute-walk 2>&1 | egrep 'serial|idVendor'
ATTRS{idVendor}=="c1ca"
ATTRS{idVendor}=="05e3"
ATTRS{idVendor}=="1d6b"
ATTRS{serial}=="musb_hdrc"
I was expecting to see "11111", and I don't. This explains why
"444444" is not working. Still - something is not working here.
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