iw_cxgb4: correctly enforce the max reg_mr depth

commit 7b72717a20bba8bdd01b14c0460be7d15061cd6b upstream.

The code was mistakenly using the length of the page array memory instead
of the depth of the page array.

This would cause MR creation to fail in some cases.

Fixes: 8376b86de7d3 ("iw_cxgb4: Support the new memory registration API")
Cc: stable@vger.kernel.org
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
index c2fba76becd4e985a35b9ed3d1ec1314c955706b..b5784cb145f5cce9081d8b2fd231e6b4996266a1 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -720,7 +720,7 @@ static int c4iw_set_page(struct ib_mr *ibmr, u64 addr)
 {
        struct c4iw_mr *mhp = to_c4iw_mr(ibmr);
 
-       if (unlikely(mhp->mpl_len == mhp->max_mpl_len))
+       if (unlikely(mhp->mpl_len == mhp->attr.pbl_size))
                return -ENOMEM;
 
        mhp->mpl[mhp->mpl_len++] = addr;