diff options
| author | Paul Durrant <pdurrant@amazon.com> | 2019-12-10 14:53:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-12 11:24:11 +0100 |
| commit | e0e0a9558e8ae857fcae981cbbf8b5e7cea838c3 (patch) | |
| tree | 379c22c267ec46f7cb9c94902d1cc9797738c885 /kernel | |
| parent | 1825ee8688790f5b151150bff5a46d69c62e1154 (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 'kernel')
0 files changed, 0 insertions, 0 deletions