On Wed, Jul 31, 2019 at 11:15 AM Pavel Machek pavel@denx.de wrote:
On Mon 2019-07-29 21:23:19, Greg Kroah-Hartman wrote:
From: Dan Williams dan.j.williams@intel.com
commit b70d31d054ee3a6fc1034b9d7fc0ae1e481aa018 upstream.
In preparation for fixing a deadlock between wait_for_bus_probe_idle() and the nvdimm_bus_list_mutex arrange for __nd_ioctl() without nvdimm_bus_list_mutex held. This also unifies the 'dimm' and 'bus' level ioctls into a common nd_ioctl() preamble implementation.
Ok, so this is a preparation patch, not a fix...
Marked for -stable as it is a pre-requisite for a follow-on fix.
...but follow-on fixes are going to be applied for 5.2 but not 4.19. So perhaps this one should not be in 4.19, either?
I plan to follow up with a backport of the series for 4.19. I have no problem with v4.19 carrying this in the meantime, but if you want to kick it out and wait for the backport, that's fine too.