4.4-stable review patch. If anyone has any objections, please let me know.
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From: Kiran Kumar Modukuri kiran.modukuri@gmail.com
[ Upstream commit d0eb06afe712b7b103b6361f40a9a0c638524669 ]
Alter the state-check assertion in fscache_enqueue_operation() to allow cancelled operations to be given processing time so they can be cleaned up.
Also fix a debugging statement that was requiring such operations to have an object assigned.
Fixes: 9ae326a69004 ("CacheFiles: A cache that backs onto a mounted filesystem") Reported-by: Kiran Kumar Modukuri kiran.modukuri@gmail.com Signed-off-by: David Howells dhowells@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/fscache/operation.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/fs/fscache/operation.c +++ b/fs/fscache/operation.c @@ -66,7 +66,8 @@ void fscache_enqueue_operation(struct fs ASSERT(op->processor != NULL); ASSERT(fscache_object_is_available(op->object)); ASSERTCMP(atomic_read(&op->usage), >, 0); - ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS); + ASSERTIFCMP(op->state != FSCACHE_OP_ST_IN_PROGRESS, + op->state, ==, FSCACHE_OP_ST_CANCELLED);
fscache_stat(&fscache_n_op_enqueue); switch (op->flags & FSCACHE_OP_TYPE) { @@ -481,7 +482,8 @@ void fscache_put_operation(struct fscach struct fscache_cache *cache;
_enter("{OBJ%x OP%x,%d}", - op->object->debug_id, op->debug_id, atomic_read(&op->usage)); + op->object ? op->object->debug_id : 0, + op->debug_id, atomic_read(&op->usage));
ASSERTCMP(atomic_read(&op->usage), >, 0);