dm exception store: fix exstore lookup to be case insensitive

When snapshots are created using 'p' instead of 'P' as the
exception store type, the device-mapper table loading fails.

This patch makes the code case insensitive as intended and fixes some
regressions reported with device-mapper snapshots.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index 75d8081a904175bcff7d3199c2deba4140fc6086..c3ae51584b12f52fc1de3434965329c43a930363 100644 (file)
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -216,7 +216,7 @@ int dm_exception_store_create(struct dm_target *ti, int argc, char **argv,
                return -EINVAL;
        }
 
-       type = get_type(argv[1]);
+       type = get_type(&persistent);
        if (!type) {
                ti->error = "Exception store type not recognised";
                r = -EINVAL;