IB/uverbs: Increase maximum devices supported
authorAlexander Chiang <achiang@hp.com>
Tue, 2 Feb 2010 19:08:09 +0000 (19:08 +0000)
committerRoland Dreier <rolandd@cisco.com>
Wed, 24 Feb 2010 18:23:41 +0000 (10:23 -0800)
commit6d6a0e71eec5886f2511632a38f28f1ed7794d70
treef00a26094daa8b221e9f2075be1206e4219f8a65
parentddbd6883013dcc9f9ca5c0b26f79d9334a95926c
IB/uverbs: Increase maximum devices supported

Some large systems may support more than IB_UVERBS_MAX_DEVICES
(currently 32).

This change allows us to support more devices in a backwards-compatible
manner.  The first IB_UVERBS_MAX_DEVICES keep the same major/minor
device numbers that they've always had.

If there are more than IB_UVERBS_MAX_DEVICES, we then dynamically
request a new major device number (new minors start at 0).

This change increases the maximum number of HCAs to 64 (from 32).

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
drivers/infiniband/core/uverbs_main.c