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net: mvneta: bm: clarify dependencies

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MVNETA_BM has a dependency on MVNETA, so we can only select the former
if the latter is enabled. However, the code dependency is the reverse:
The mvneta module can call into the mvneta_bm module, so mvneta cannot
be a built-in if mvneta_bm is a module, or we get a link error:

drivers/net/built-in.o: In function `mvneta_remove':
drivers/net/ethernet/marvell/mvneta.c:4211: undefined reference to `mvneta_bm_pool_destroy'
drivers/net/built-in.o: In function `mvneta_bm_update_mtu':
drivers/net/ethernet/marvell/mvneta.c:1034: undefined reference to `mvneta_bm_bufs_free'

This avoids the problem by further clarifying the dependency so that
MVNETA_BM is a silent Kconfig option that gets turned on by the
new MVNETA_BM_ENABLE option. This way both the core HWBM module and
the MVNETA_BM code are always built-in when needed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: dc35a10f68 ("net: mvneta: bm: add support for hardware buffer management")
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2016-03-15 22:47:14 +01:00 committed by David S. Miller
parent 3a461da1d0
commit 019ded3aa7
1 changed files with 10 additions and 2 deletions
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12
drivers/net/ethernet/marvell/Kconfig
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@ -40,10 +40,9 @@ config MVMDIO
This driver is used by the MV643XX_ETH and MVNETA drivers.
config MVNETA_BM
config MVNETA_BM_ENABLE
tristate "Marvell Armada 38x/XP network interface BM support"
depends on MVNETA
select HWBM
---help---
This driver supports auxiliary block of the network
interface units in the Marvell ARMADA XP and ARMADA 38x SoC
@ -67,6 +66,15 @@ config MVNETA
driver, which should be used for the older Marvell SoCs
(Dove, Orion, Discovery, Kirkwood).
config MVNETA_BM
tristate
default y if MVNETA=y && MVNETA_BM_ENABLE
default MVNETA_BM_ENABLE
select HWBM
help
MVNETA_BM must not be 'm' if MVNETA=y, so this symbol ensures
that all dependencies are met.
config MVPP2
tristate "Marvell Armada 375 network interface support"
depends on MACH_ARMADA_375