2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: NeilBrown <[email protected]> commit 8f5f02c460b7ca74ce55ce126ce0c1e58a3f923d upstream. 'mdp' devices are md devices with preallocated device numbers for partitions. As such it is possible to mknod and open a partition before opening the whole device. this causes md_probe() to be called with a device number of a partition, which in-turn calls mddev_find with such a number. However mddev_find expects the number of a 'whole device' and does the wrong thing with partition numbers. So add code to mddev_find to remove the 'partition' part of a device number and just work with the 'whole device'. This patch addresses https://bugzilla.kernel.org/show_bug.cgi?id=28652 Reported-by: [email protected] Signed-off-by: NeilBrown <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andi Kleen <[email protected]> --- drivers/md/md.c | 3 +++ 1 file changed, 3 insertions(+) Index: linux-2.6.35.y/drivers/md/md.c =================================================================== --- linux-2.6.35.y.orig/drivers/md/md.c 2011-03-29 23:02:59.630309629 -0700 +++ linux-2.6.35.y/drivers/md/md.c 2011-03-29 23:53:36.584601568 -0700 @@ -441,6 +441,9 @@ { mddev_t *mddev, *new = NULL; + if (unit && MAJOR(unit) != MD_MAJOR) + unit &= ~((1<<MdpMinorShift)-1); + retry: spin_lock(&all_mddevs_lock); _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
