[PATCH] IB/rxe: fix kconfig dependency warning for RDMA_RXE

[Necip Fazil Yildiran]

When RDMA_RXE is enabled and CRYPTO is disabled, it results in the
following Kbuild warning:

WARNING: unmet direct dependencies detected for CRYPTO_CRC32
  Depends on [n]: CRYPTO [=n]
  Selected by [y]:
  - RDMA_RXE [=y] && (INFINIBAND_USER_ACCESS [=y] || !INFINIBAND_USER_ACCESS [=y]) && INET [=y] && PCI [=y] && INFINIBAND [=y] && (!64BIT || ARCH_DMA_ADDR_T_64BIT [=n])

The reason is that RDMA_RXE selects CRYPTO_CRC32 without depending on or
selecting CRYPTO while CRYPTO_CRC32 is subordinate to CRYPTO.

Honor the kconfig menu hierarchy to remove kconfig dependency warnings.

Fixes: 0812ed132178 ("IB/rxe: Change RDMA_RXE kconfig to use select")
Signed-off-by: Necip Fazil Yildiran <fazilyildiran@xxxxxxxxx>
---
 drivers/infiniband/sw/rxe/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/sw/rxe/Kconfig b/drivers/infiniband/sw/rxe/Kconfig
index a0c6c7dfc181..e1f52710edfc 100644
--- a/drivers/infiniband/sw/rxe/Kconfig
+++ b/drivers/infiniband/sw/rxe/Kconfig
@@ -4,6 +4,7 @@ config RDMA_RXE
 	depends on INET && PCI && INFINIBAND
 	depends on !64BIT || ARCH_DMA_ADDR_T_64BIT
 	select NET_UDP_TUNNEL
+	select CRYPTO
 	select CRYPTO_CRC32
 	select DMA_VIRT_OPS
 	help
-- 
2.25.1