[RFC][PATCH 1/4] dm-log: fix io_client_destroy leak

[Takahiro Yasui <tyasui@redhat.com>]

In create_log_context function, dm_io_client_destroy function needs
to be called, when memory allocation of disk_header, sync_bits and
recovering_bits failed, but dm_io_client_destroy is not called.
This patch fixes it.


Signed-off-by: Takahiro Yasui <tyasui@redhat.com>
---
 drivers/md/dm-log.c |    5 +++++
 1 file changed, 5 insertions(+)

Index: linux-2.6.28-rc4/drivers/md/dm-log.c
===================================================================
--- linux-2.6.28-rc4.orig/drivers/md/dm-log.c
+++ linux-2.6.28-rc4/drivers/md/dm-log.c
@@ -467,6 +467,7 @@ static int create_log_context(struct dm_
 		lc->disk_header = vmalloc(buf_size);
 		if (!lc->disk_header) {
 			DMWARN("couldn't allocate disk log buffer");
+			dm_io_client_destroy(lc->io_req.client);
 			kfree(lc);
 			return -ENOMEM;
 		}
@@ -483,6 +484,8 @@ static int create_log_context(struct dm_
 		if (!dev)
 			vfree(lc->clean_bits);
 		vfree(lc->disk_header);
+		if (dev)
+			dm_io_client_destroy(lc->io_req.client);
 		kfree(lc);
 		return -ENOMEM;
 	}
@@ -496,6 +499,8 @@ static int create_log_context(struct dm_
 		if (!dev)
 			vfree(lc->clean_bits);
 		vfree(lc->disk_header);
+		if (dev)
+			dm_io_client_destroy(lc->io_req.client);
 		kfree(lc);
 		return -ENOMEM;
 	}