diff options
| author | Paul Durrant <pdurrant@amazon.com> | 2019-12-10 14:53:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-09 10:19:51 +0100 |
| commit | ec177a46e9d0d35f81b254a616ff03fe757f14f6 (patch) | |
| tree | e5a8f1b2217f7cf4217b408c789528bb46b77231 /drivers/xen | |
| parent | e56db866ceac1fbbbbda57d305764b9d957819e1 (diff) | |
xen-blkback: prevent premature module unload
[ Upstream commit fa2ac657f9783f0891b2935490afe9a7fd29d3fa ]
Objects allocated by xen_blkif_alloc come from the 'blkif_cache' kmem
cache. This cache is destoyed when xen-blkif is unloaded so it is
necessary to wait for the deferred free routine used for such objects to
complete. This necessity was missed in commit 14855954f636 "xen-blkback:
allow module to be cleanly unloaded". This patch fixes the problem by
taking/releasing extra module references in xen_blkif_alloc/free()
respectively.
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/xen')
0 files changed, 0 insertions, 0 deletions