Commit 9d090d01 authored Apr 17, 2016 by Linus Torvalds

linux-dm

Pull device mapper fix from Mike Snitzer:
 "Fix for earlier 4.6-rc4 stable@ commit that introduced improper use of
  write lock in cmd_read_lock() -- due to cut-n-paste gone awry (and
  sparse didn't catch it)"

* tag 'dm-4.6-fix-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache metadata: fix cmd_read_lock() acquiring write lock

parents b9f5dba2 6545b60b

drivers/md/dm-cache-metadata.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -894,9 +894,9 @@ static bool cmd_write_lock(struct dm_cache_metadata *cmd)

		static bool cmd_read_lock(struct dm_cache_metadata *cmd)
		{
		down_write(&cmd->root_lock);
		down_read(&cmd->root_lock);
		if (cmd->fail_io) {
		up_write(&cmd->root_lock);
		up_read(&cmd->root_lock);
		return false;
		}
		return true;

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