From: Vladimir Oltean Date: Mon, 26 Jul 2021 14:25:36 +0000 (+0300) Subject: net: build all switchdev drivers as modules when the bridge is a module X-Git-Tag: v5.15-rc1~157^2~383 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b0e81817629a496854ff1799f6cbd89597db65fd;p=thirdparty%2Flinux.git net: build all switchdev drivers as modules when the bridge is a module Currently, all drivers depend on the bool CONFIG_NET_SWITCHDEV, but only the drivers that call some sort of function exported by the bridge, like br_vlan_enabled() or whatever, have an extra dependency on CONFIG_BRIDGE. Since the blamed commit, all switchdev drivers have a functional dependency upon switchdev_bridge_port_{,un}offload(), which is a pair of functions exported by the bridge module and not by the bridge-independent part of CONFIG_NET_SWITCHDEV. Problems appear when we have: CONFIG_BRIDGE=m CONFIG_NET_SWITCHDEV=y CONFIG_TI_CPSW_SWITCHDEV=y because cpsw, am65_cpsw and sparx5 will then be built-in but they will call a symbol exported by a loadable module. This is not possible and will result in the following build error: drivers/net/ethernet/ti/cpsw_new.o: in function `cpsw_netdevice_event': drivers/net/ethernet/ti/cpsw_new.c:1520: undefined reference to `switchdev_bridge_port_offload' drivers/net/ethernet/ti/cpsw_new.c:1537: undefined reference to `switchdev_bridge_port_unoffload' As mentioned, the other switchdev drivers don't suffer from this because switchdev_bridge_port_offload() is not the first symbol exported by the bridge that they are calling, so they already needed to deal with this in the same way. Fixes: 2f5dc00f7a3e ("net: bridge: switchdev: let drivers inform which bridge ports are offloaded") Reported-by: Linux Kernel Functional Testing Signed-off-by: Vladimir Oltean Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/microchip/sparx5/Kconfig b/drivers/net/ethernet/microchip/sparx5/Kconfig index 7bdbb2d09a148..d39ae2a6fb49f 100644 --- a/drivers/net/ethernet/microchip/sparx5/Kconfig +++ b/drivers/net/ethernet/microchip/sparx5/Kconfig @@ -1,5 +1,6 @@ config SPARX5_SWITCH tristate "Sparx5 switch driver" + depends on BRIDGE || BRIDGE=n depends on NET_SWITCHDEV depends on HAS_IOMEM depends on OF diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index affcf92cd3aa5..7ac8e5ecbe97c 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -64,6 +64,7 @@ config TI_CPSW config TI_CPSW_SWITCHDEV tristate "TI CPSW Switch Support with switchdev" depends on ARCH_DAVINCI || ARCH_OMAP2PLUS || COMPILE_TEST + depends on BRIDGE || BRIDGE=n depends on NET_SWITCHDEV depends on TI_CPTS || !TI_CPTS select PAGE_POOL @@ -109,6 +110,7 @@ config TI_K3_AM65_CPSW_NUSS config TI_K3_AM65_CPSW_SWITCHDEV bool "TI K3 AM654x/J721E CPSW Switch mode support" depends on TI_K3_AM65_CPSW_NUSS + depends on BRIDGE || BRIDGE=n depends on NET_SWITCHDEV help This enables switchdev support for TI K3 CPSWxG Ethernet