diff options
| -rw-r--r-- | drivers/md/dm-writecache.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index e974204b0d6f..2b3950dd45e8 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -2499,6 +2499,11 @@ invalid_optional: } if (WC_MODE_PMEM(wc)) { + if (!wc->ssd_dev->dax_dev) { + r = -EOPNOTSUPP; + ti->error = "Cache device is not a DAX device"; + goto bad; + } if (!dax_synchronous(wc->ssd_dev->dax_dev)) { r = -EOPNOTSUPP; ti->error = "Asynchronous persistent memory not supported as pmem cache"; |