6.1-stable review patch. If anyone has any objections, please let me know.
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From: Mikulas Patocka mpatocka@redhat.com
commit 9c565428788fb9b49066f94ab7b10efc686a0a4c upstream.
There's a possible race condition in dm-ebs - dm bufio prefetch may be in progress while the device is suspended. Fix this by calling dm_bufio_client_reset in the postsuspend hook.
Signed-off-by: Mikulas Patocka mpatocka@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm-ebs-target.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/md/dm-ebs-target.c +++ b/drivers/md/dm-ebs-target.c @@ -389,6 +389,12 @@ static int ebs_map(struct dm_target *ti, return DM_MAPIO_REMAPPED; }
+static void ebs_postsuspend(struct dm_target *ti) +{ + struct ebs_c *ec = ti->private; + dm_bufio_client_reset(ec->bufio); +} + static void ebs_status(struct dm_target *ti, status_type_t type, unsigned int status_flags, char *result, unsigned int maxlen) { @@ -446,6 +452,7 @@ static struct target_type ebs_target = { .ctr = ebs_ctr, .dtr = ebs_dtr, .map = ebs_map, + .postsuspend = ebs_postsuspend, .status = ebs_status, .io_hints = ebs_io_hints, .prepare_ioctl = ebs_prepare_ioctl,