tree e91ef7b6fb2869908ce1aa7372747687ad0b5ec3
parent ba466c74d99b91b2f390a09ad31bbc6cddd8cf4b
author Goldwyn Rodrigues <rgoldwyn@suse.de> 1309796817 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1309820008 -0700

RDMA: Check for NULL mode in .devnode methods

Commits 71c29bd5c235 ("IB/uverbs: Add devnode method to set path/mode")
and c3af0980ce01 ("IB: Add devnode methods to cm_class and umad_class")
added devnode methods that set the mode.

However, these methods don't check for a NULL mode, and so we get a
crash when unloading modules because devtmpfs_delete_node() calls
device_get_devnode() with mode == NULL.

Add the missing checks.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
[ Also fix cm.c.  - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>