staging/o2iblnd: Avoid calling ib_query_device

Instead, use the cached copy of the attributes present on the device.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c
index 7c730e3f7453ec034c5f2bc1ad824eb18715b1e7..7231ef8a91594207302d0935ae90ab91dd842857 100644 (file)
--- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c
+++ b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c
@@ -2070,32 +2070,13 @@ static int kiblnd_net_init_pools(kib_net_t *net, __u32 *cpts, int ncpts)
 
 static int kiblnd_hdev_get_attr(kib_hca_dev_t *hdev)
 {
-       struct ib_device_attr *attr;
-       int rc;
-
        /* It's safe to assume a HCA can handle a page size
         * matching that of the native system */
        hdev->ibh_page_shift = PAGE_SHIFT;
        hdev->ibh_page_size  = 1 << PAGE_SHIFT;
        hdev->ibh_page_mask  = ~((__u64)hdev->ibh_page_size - 1);
 
-       LIBCFS_ALLOC(attr, sizeof(*attr));
-       if (attr == NULL) {
-               CERROR("Out of memory\n");
-               return -ENOMEM;
-       }
-
-       rc = ib_query_device(hdev->ibh_ibdev, attr);
-       if (rc == 0)
-               hdev->ibh_mr_size = attr->max_mr_size;
-
-       LIBCFS_FREE(attr, sizeof(*attr));
-
-       if (rc != 0) {
-               CERROR("Failed to query IB device: %d\n", rc);
-               return rc;
-       }
-
+       hdev->ibh_mr_size = hdev->ibh_ibdev->attrs.max_mr_size;
        if (hdev->ibh_mr_size == ~0ULL) {
                hdev->ibh_mr_shift = 64;
                return 0;