[PATCH] IB uverbs: add mthca user PD support

Add support for userspace protection domains (PDs) to mthca.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 9acb8c54ce4f..318356c19abe 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -368,12 +368,20 @@ static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
         if (!pd)
                 return ERR_PTR(-ENOMEM);
 
-        err = mthca_pd_alloc(to_mdev(ibdev), pd);
+        err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
         if (err) {
                 kfree(pd);
                 return ERR_PTR(err);
         }
 
+        if (context) {
+                if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
+                        mthca_pd_free(to_mdev(ibdev), pd);
+                        kfree(pd);
+                        return ERR_PTR(-EFAULT);
+                }
+        }
+
         return &pd->ibpd;
 }