randy_dunlap <rdunlap@xenotime.net>

Convert deprecated check_region() calls to request/release region.
Add return value check on one request_region().

I suspect that it may do an extra release_region(), which should
generate a warning message from the kernel.
Signed-off-by: randy_dunlap <rdunlap@xenotime.net>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>