From dafa724bf582181d9a7d54f5cb4ca0bf8ef29269 Mon Sep 17 00:00:00 2001 From: "tang.junhui" Date: Fri, 21 Oct 2016 09:35:32 +0800 Subject: [PATCH] dm table: fix missing dm_put_target_type() in dm_table_add_target() dm_get_target_type() was previously called so any error returned from dm_table_add_target() must first call dm_put_target_type(). Otherwise the DM target module's reference count will leak and the associated kernel module will be unable to be removed. Also, leverage the fact that r is already -EINVAL and remove an extra newline. Fixes: 36a0456 ("dm table: add immutable feature") Fixes: cc6cbe1 ("dm table: add always writeable feature") Fixes: 3791e2f ("dm table: add singleton feature") Cc: stable@vger.kernel.org # 3.2+ Signed-off-by: tang.junhui Signed-off-by: Mike Snitzer --- drivers/md/dm-table.c | 24 +++++++++--------------- 1 file changed, 9 insertions(+), 15 deletions(-) diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 3e407a9..c4b53b3 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -695,37 +695,32 @@ int dm_table_add_target(struct dm_table *t, const char *type, tgt->type = dm_get_target_type(type); if (!tgt->type) { - DMERR("%s: %s: unknown target type", dm_device_name(t->md), - type); + DMERR("%s: %s: unknown target type", dm_device_name(t->md), type); return -EINVAL; } if (dm_target_needs_singleton(tgt->type)) { if (t->num_targets) { - DMERR("%s: target type %s must appear alone in table", - dm_device_name(t->md), type); - return -EINVAL; + tgt->error = "singleton target type must appear alone in table"; + goto bad; } t->singleton = true; } if (dm_target_always_writeable(tgt->type) && !(t->mode & FMODE_WRITE)) { - DMERR("%s: target type %s may not be included in read-only tables", - dm_device_name(t->md), type); - return -EINVAL; + tgt->error = "target type may not be included in a read-only table"; + goto bad; } if (t->immutable_target_type) { if (t->immutable_target_type != tgt->type) { - DMERR("%s: immutable target type %s cannot be mixed with other target types", - dm_device_name(t->md), t->immutable_target_type->name); - return -EINVAL; + tgt->error = "immutable target type cannot be mixed with other target types"; + goto bad; } } else if (dm_target_is_immutable(tgt->type)) { if (t->num_targets) { - DMERR("%s: immutable target type %s cannot be mixed with other target types", - dm_device_name(t->md), tgt->type->name); - return -EINVAL; + tgt->error = "immutable target type cannot be mixed with other target types"; + goto bad; } t->immutable_target_type = tgt->type; } @@ -740,7 +735,6 @@ int dm_table_add_target(struct dm_table *t, const char *type, */ if (!adjoin(t, tgt)) { tgt->error = "Gap in table"; - r = -EINVAL; goto bad; } -- 2.7.4