[RFC 08/13] [net-next] make legacy ISA probe optional

From: Arnd Bergmann
Date: Sat May 15 2021 - 18:15:44 EST

From: Arnd Bergmann <arnd@xxxxxxxx>

There are very few ISA drivers left that rely on the static probing from
drivers/net/Space.o. Make them all select a new CONFIG_NETDEV_LEGACY_INIT
symbol, and drop the entire probe logic when that is disabled.

The 9 drivers that are called from Space.c are the same set that
calls netdev_boot_setup_check().

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/net/Kconfig | 7 +++++++
drivers/net/Makefile | 3 ++-
drivers/net/appletalk/Kconfig | 4 +++-
drivers/net/ethernet/3com/Kconfig | 1 +
drivers/net/ethernet/8390/Kconfig | 3 +++
drivers/net/ethernet/8390/ne.c | 2 ++
drivers/net/ethernet/amd/Kconfig | 2 ++
drivers/net/ethernet/cirrus/Kconfig | 1 +
drivers/net/ethernet/smsc/Kconfig | 1 +
9 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 74dc8e249faa..6dccd68a99d3 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -603,4 +603,11 @@ config NET_FAILOVER
a VM with direct attached VF by failing over to the paravirtual
datapath when the VF is unplugged.

+config NETDEV_LEGACY_INIT
+ bool
+ depends on ISA
+ help
+ Drivers that call netdev_boot_setup_check() should select this
+ symbol, everything else no longer needs it.
+
endif # NETDEVICES
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 7ffd2d03efaf..e0ce373c68dd 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -18,7 +18,8 @@ obj-$(CONFIG_MACVLAN) += macvlan.o
obj-$(CONFIG_MACVTAP) += macvtap.o
obj-$(CONFIG_MII) += mii.o
obj-$(CONFIG_MDIO) += mdio.o
-obj-$(CONFIG_NET) += Space.o loopback.o
+obj-$(CONFIG_NET) += loopback.o
+obj-$(CONFIG_NETDEV_LEGACY_INIT) += Space.o
obj-$(CONFIG_NETCONSOLE) += netconsole.o
obj-y += phy/
obj-y += mdio/
diff --git a/drivers/net/appletalk/Kconfig b/drivers/net/appletalk/Kconfig
index 43918398f0d3..90b9f1d6eda9 100644
--- a/drivers/net/appletalk/Kconfig
+++ b/drivers/net/appletalk/Kconfig
@@ -52,7 +52,9 @@ config LTPC

config COPS
tristate "COPS LocalTalk PC support"
- depends on DEV_APPLETALK && (ISA || EISA)
+ depends on DEV_APPLETALK && ISA
+ depends on NETDEVICES
+ select NETDEV_LEGACY_INIT
help
This allows you to use COPS AppleTalk cards to connect to LocalTalk
networks. You also need version 1.3.3 or later of the netatalk
diff --git a/drivers/net/ethernet/3com/Kconfig b/drivers/net/ethernet/3com/Kconfig
index a52a3740f0c9..706bd59bf645 100644
--- a/drivers/net/ethernet/3com/Kconfig
+++ b/drivers/net/ethernet/3com/Kconfig
@@ -34,6 +34,7 @@ config EL3
config 3C515
tristate "3c515 ISA \"Fast EtherLink\""
depends on ISA && ISA_DMA_API && !PPC32
+ select NETDEV_LEGACY_INIT
help
If you have a 3Com ISA EtherLink XL "Corkscrew" 3c515 Fast Ethernet
network card, say Y here.
diff --git a/drivers/net/ethernet/8390/Kconfig b/drivers/net/ethernet/8390/Kconfig
index 9f4b302fd2ce..a4130e643342 100644
--- a/drivers/net/ethernet/8390/Kconfig
+++ b/drivers/net/ethernet/8390/Kconfig
@@ -102,6 +102,7 @@ config MCF8390
config NE2000
tristate "NE2000/NE1000 support"
depends on (ISA || (Q40 && m) || MACH_TX49XX || ATARI_ETHERNEC)
+ select NETDEV_LEGACY_INIT if ISA
select CRC32
help
If you have a network (Ethernet) card of this type, say Y here.
@@ -169,6 +170,7 @@ config STNIC
config ULTRA
tristate "SMC Ultra support"
depends on ISA
+ select NETDEV_LEGACY_INIT
select CRC32
help
If you have a network (Ethernet) card of this type, say Y here.
@@ -186,6 +188,7 @@ config ULTRA
config WD80x3
tristate "WD80*3 support"
depends on ISA
+ select NETDEV_LEGACY_INIT
select CRC32
help
If you have a network (Ethernet) card of this type, say Y here.
diff --git a/drivers/net/ethernet/8390/ne.c b/drivers/net/ethernet/8390/ne.c
index e9756d0ea5b8..d0bbe2180b9e 100644
--- a/drivers/net/ethernet/8390/ne.c
+++ b/drivers/net/ethernet/8390/ne.c
@@ -951,6 +951,7 @@ static int __init ne_init(void)
}
module_init(ne_init);

+#ifdef CONFIG_NETDEV_LEGACY_INIT
struct net_device * __init ne_probe(int unit)
{
int this_dev;
@@ -991,6 +992,7 @@ struct net_device * __init ne_probe(int unit)

return ERR_PTR(-ENODEV);
}
+#endif
#endif /* MODULE */

static void __exit ne_exit(void)
diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index d0b0609bbe23..c6a3abec86f5 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -46,6 +46,7 @@ config AMD8111_ETH
config LANCE
tristate "AMD LANCE and PCnet (AT1500 and NE2100) support"
depends on ISA && ISA_DMA_API && !ARM && !PPC32
+ select NETDEV_LEGACY_INIT
help
If you have a network (Ethernet) card of this type, say Y here.
Some LinkSys cards are of this type.
@@ -132,6 +133,7 @@ config PCMCIA_NMCLAN
config NI65
tristate "NI6510 support"
depends on ISA && ISA_DMA_API && !ARM && !PPC32
+ select NETDEV_LEGACY_INIT
help
If you have a network (Ethernet) card of this type, say Y here.

diff --git a/drivers/net/ethernet/cirrus/Kconfig b/drivers/net/ethernet/cirrus/Kconfig
index 7141340a8b0e..dac1764ba740 100644
--- a/drivers/net/ethernet/cirrus/Kconfig
+++ b/drivers/net/ethernet/cirrus/Kconfig
@@ -26,6 +26,7 @@ config CS89x0_ISA
depends on ISA
depends on !PPC32
depends on CS89x0_PLATFORM=n
+ select NETDEV_LEGACY_INIT
select CS89x0
help
Support for CS89x0 chipset based Ethernet cards. If you have a
diff --git a/drivers/net/ethernet/smsc/Kconfig b/drivers/net/ethernet/smsc/Kconfig
index c52a38df0e0d..72e42a868346 100644
--- a/drivers/net/ethernet/smsc/Kconfig
+++ b/drivers/net/ethernet/smsc/Kconfig
@@ -23,6 +23,7 @@ config SMC9194
tristate "SMC 9194 support"
depends on ISA
select CRC32
+ select NETDEV_LEGACY_INIT
help
This is support for the SMC9xxx based Ethernet cards. Choose this
option if you have a DELL laptop with the docking station, or
--
2.29.2