diff options
| author | Michal Suchanek <msuchanek@suse.de> | 2020-06-30 17:49:24 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-07-08 11:06:57 -0400 |
| commit | a46624580376a3a0beb218d94cbc7f258696e29f (patch) | |
| tree | 26716b5314274854e059edb71bd7396c0f8e559f /drivers/md | |
| parent | 382761dc6312965a11f82f2217e16ec421bf17ae (diff) | |
dm writecache: reject asynchronous pmem devices
DM writecache does not handle asynchronous pmem. Reject it when
supplied as cache.
Link: https://lore.kernel.org/linux-nvdimm/87lfk5hahc.fsf@linux.ibm.com/
Fixes: 6e84200c0a29 ("virtio-pmem: Add virtio pmem driver")
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org # 5.3+
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-writecache.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index 30505d70f423..5358894bb9fd 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -2266,6 +2266,12 @@ invalid_optional: } if (WC_MODE_PMEM(wc)) { + if (!dax_synchronous(wc->ssd_dev->dax_dev)) { + r = -EOPNOTSUPP; + ti->error = "Asynchronous persistent memory not supported as pmem cache"; + goto bad; + } + r = persistent_memory_claim(wc); if (r) { ti->error = "Unable to map persistent memory for cache"; |