IB/mthca: Free correct MPT on error exit from mthca_fmr_alloc()
When mthca_fmr_alloc() returns an error, it should free the MPT at the
index key, not mr->ibmr.lkey, since the lkey has been mangled by
hw_index_to_key() and no longer is the real index. This bug causes
corruption of the MPT table free bitmap when mthca_fmr_alloc() fails.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mthca/mthca_mr.c b/drivers/infiniband/hw/mthca/mthca_mr.c
index 3b69855..3538da1 100644
--- a/drivers/infiniband/hw/mthca/mthca_mr.c
+++ b/drivers/infiniband/hw/mthca/mthca_mr.c
@@ -686,7 +686,7 @@
mthca_table_put(dev, dev->mr_table.mpt_table, key);
err_out_mpt_free:
- mthca_free(&dev->mr_table.mpt_alloc, mr->ibmr.lkey);
+ mthca_free(&dev->mr_table.mpt_alloc, key);
return err;
}