mirror of
https://github.com/ibm-s390-linux/s390-tools.git
synced 2026-08-05 02:14:52 +00:00
d82f5e1f49
Changing the cmb_enable attribute of a CCW device can cause a blocked chzdev process or udev rule. This problem occurs when the device is offline, cmb_enable is 0, and chzdev is used to set cmb_enable=1 and online=1 at the same time. The following call will block: chzdev 190d -a cmb_enable=1 online=1 The following call will generate a udev rule that will block subsequent calls to 'udevadm settle': chzdev 190d -p online=1 cmb_enable=1 Fix this by ensuring that cmb_enable is only set when the CCW device is not online. Reported-by: André Wild <wild@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>