tree 1ceadcb10339e74551d6cb2ff6a09fcc83433655
parent 605b91c8f619047ed6d88e24c531d4bdddad46f4
author Jonathan Lallinger <jonathan@ogc.us> 1317283121 +0000
committer David S. Miller <davem@davemloft.net> 1317322639 -0400

RDSRDMA: Fix cleanup of rds_iw_mr_pool

In the rds_iw_mr_pool struct the free_pinned field keeps track of
memory pinned by free MRs. While this field is incremented properly
upon allocation, it is never decremented upon unmapping. This would
cause the rds_rdma module to crash the kernel upon unloading, by
triggering the BUG_ON in the rds_iw_destroy_mr_pool function.

This change keeps track of the MRs that become unpinned, so that
free_pinned can be decremented appropriately.

Signed-off-by: Jonathan Lallinger <jonathan@ogc.us>
Signed-off-by: Steve Wise <swise@ogc.us>
Signed-off-by: David S. Miller <davem@davemloft.net>