tree bc74bef37ecdceed31a15b4aefd1defccecf4a40
parent ab11f89929b785daaa428801bd8b7e65241d7913
author NeilBrown <neilb@suse.de> 1138964620 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1138984319 -0800

[PATCH] md: Handle overflow of mdu_array_info_t->size better

mdu_array_info_t->size is 'int', which isn't big enough for the size (in KB of
each component in) some arrays.

So rather than a random overflow, set size to -1 when it cannot be set
correctly.

To update aspect on an array, userspace will sometimes:
  get_array_info
  change one field
  set_array_info

in this case, we don't want the '-1' in 'size' to change to size, or look like
a size change at all.  So test for that in update_array_info.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>