[SRU][X][B][F][G][PATCH 0/1] Don't NULL tty->driver_data until hvcs_cleanup() (LP: 1892546)

[patricia.domingues at canonical.com]

BugLink: https://bugs.launchpad.net/bugs/1892546

SRU Justification:

[Impact]
* drmgr command is failing while trying to open console for IBMi on PowerVM LPAR

[Fix]
* 63ffcbdad738 "tty: hvcs: Don't NULL tty->driver_data until hvcs_cleanup()"

[Test Case]
* Create a VM from PowerVC on a Novalink managed host. 
* Unmanage and manage the VM, this problem gets reproduced.
* grep the logs for "drmgr"


[Regression Potential]
The regression can be considered as very low, since:
* limited to the IBM Hypervisor Virtual Console Server.
* patched kernel where shared and successfully tested by IBM.
* the worse case, if the cleanup is broken a new opened connection might break.

[Other]
* The patch got upstream accepted.


Tyrel Datwyler (1):
  tty: hvcs: Don't NULL tty->driver_data until hvcs_cleanup()

 drivers/tty/hvc/hvcs.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

-- 
2.17.1