[PATCH 4.16 25/52] infiniband: mlx5: fix build errors when INFINIBAND_USER_ACCESS=m

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

commit b3fe6c62bc66868c45b5bb16050e6bcb333af337 upstream.

Fix build errors when INFINIBAND_USER_ACCESS=m and MLX5_INFINIBAND=y.
The build error occurs when the mlx5 driver code attempts to use
USER_ACCESS interfaces, which are built as a loadable module.

Fixes these build errors:

drivers/infiniband/hw/mlx5/main.o: In function `populate_specs_root':
../drivers/infiniband/hw/mlx5/main.c:4982: undefined reference to `uverbs_default_get_objects'
../drivers/infiniband/hw/mlx5/main.c:4994: undefined reference to `uverbs_alloc_spec_tree'
drivers/infiniband/hw/mlx5/main.o: In function `depopulate_specs_root':
../drivers/infiniband/hw/mlx5/main.c:5001: undefined reference to `uverbs_free_spec_tree'

Build-tested with multiple config combinations.

Fixes: 8c84660bb437 ("IB/mlx5: Initialize the parsing tree root without the help of uverbs")
Cc: stable@xxxxxxxxxxxxxxx # reported against 4.16
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/infiniband/hw/mlx5/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/hw/mlx5/Kconfig
+++ b/drivers/infiniband/hw/mlx5/Kconfig
@@ -1,6 +1,7 @@
 config MLX5_INFINIBAND
 	tristate "Mellanox Connect-IB HCA support"
 	depends on NETDEVICES && ETHERNET && PCI && MLX5_CORE
+	depends on INFINIBAND_USER_ACCESS || INFINIBAND_USER_ACCESS=n
 	---help---
 	  This driver provides low-level InfiniBand support for
 	  Mellanox Connect-IB PCI Express host channel adapters (HCAs).