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

patricia.domingues at canonical.com patricia.domingues at canonical.com
Tue Sep 15 18:56:48 UTC 2020

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

SRU Justification:

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

* 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.

* 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(-)


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