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Subject[PATCH 2/3] net: dsa: tag_ocelot_8021q: fix driver dependency
Date
From: Arnd Bergmann <arnd@arndb.de>

When the ocelot driver code is in a library, the dsa tag
code cannot be built-in:

ld.lld: error: undefined symbol: ocelot_can_inject
>>> referenced by tag_ocelot_8021q.c
>>> dsa/tag_ocelot_8021q.o:(ocelot_xmit) in archive net/built-in.a

ld.lld: error: undefined symbol: ocelot_port_inject_frame
>>> referenced by tag_ocelot_8021q.c
>>> dsa/tag_ocelot_8021q.o:(ocelot_xmit) in archive net/built-in.a

Building the tag support only really makes sense for compile-testing
when the driver is available, so add a Kconfig dependency that prevents
the broken configuration while allowing COMPILE_TEST alternative when
MSCC_OCELOT_SWITCH_LIB is disabled entirely. This case is handled
through the #ifdef check in include/soc/mscc/ocelot.h.

Fixes: 0a6f17c6ae21 ("net: dsa: tag_ocelot_8021q: add support for PTP timestamping")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
net/dsa/Kconfig | 2 ++
1 file changed, 2 insertions(+)

diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 3589224c8da9..58b8fc82cd3c 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -118,6 +118,8 @@ config NET_DSA_TAG_OCELOT

config NET_DSA_TAG_OCELOT_8021Q
tristate "Tag driver for Ocelot family of switches, using VLAN"
+ depends on MSCC_OCELOT_SWITCH_LIB || \
+ (MSCC_OCELOT_SWITCH_LIB=n && COMPILE_TEST)
select NET_DSA_TAG_8021Q
help
Say Y or M if you want to enable support for tagging frames with a
--
2.29.2
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