wifi: mt76: fix airoha_npu dependency tracking

commit 7cd57ff6c6263519e6e463cbc2e0898828a70c42 upstream.

There is a new build failure with MT7996E=m MT76_CORE=y and NET_AIROHA_NPU=m:

ld.lld: error: undefined symbol: airoha_npu_get
ld.lld: error: undefined symbol: airoha_npu_put
>>> referenced by npu.c
>>>               drivers/net/wireless/mediatek/mt76/npu.o:(mt76_npu_init) in archive vmlinux.a

Fix this by reworking the dependency for the MT7996_NPU to only
allow enabling that when mt76_core can link against the npu driver.

To make sure this gets caught more easily in the future when additional
mt76 variants need the same dependency, also turn CONFIG_MT76_NPU into
a tristate symbol that has the same dependency.

Fixes: 7fb554b1b623 ("wifi: mt76: Introduce the NPU generic layer")
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260612201519.4054683-1-arnd@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/mediatek/mt76/Kconfig b/drivers/net/wireless/mediatek/mt76/Kconfig
index 274709a0f88795c27b26a6cfe48923bb7e71be71..71e58689e12c4447e762c37af08d373336ad97c2 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/Kconfig
+++ b/drivers/net/wireless/mediatek/mt76/Kconfig
@@ -38,8 +38,8 @@ config MT792x_USB
        select MT76_USB
 
 config MT76_NPU
-       bool
-       depends on MT76_CORE
+       tristate
+       depends on NET_AIROHA_NPU=y || MT76_CORE=NET_AIROHA_NPU
 
 source "drivers/net/wireless/mediatek/mt76/mt76x0/Kconfig"
 source "drivers/net/wireless/mediatek/mt76/mt76x2/Kconfig"

diff --git a/drivers/net/wireless/mediatek/mt76/Makefile b/drivers/net/wireless/mediatek/mt76/Makefile
index 83759d758745421347cd57c96381ccdb71f6c7ea..df2ac99c887290c4e534d259839f40f9bea62a9e 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/Makefile
+++ b/drivers/net/wireless/mediatek/mt76/Makefile
@@ -12,7 +12,11 @@ mt76-y := \
        mmio.o util.o trace.o dma.o mac80211.o debugfs.o eeprom.o \
        tx.o agg-rx.o mcu.o wed.o scan.o channel.o
 
-mt76-$(CONFIG_MT76_NPU) += npu.o
+ifdef CONFIG_MT76_NPU
+# CONFIG_MT76_NPU is tristate to simplify dependency tracking,
+# but it behaves as a bool symbol here.
+mt76-y += npu.o
+endif
 mt76-$(CONFIG_PCI) += pci.o
 mt76-$(CONFIG_NL80211_TESTMODE) += testmode.o
 

diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index d511592a1ad877afa3d58a1394b89db58479a5fe..2a186b47659b63f425acea198d340244f8970307 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -1626,7 +1626,7 @@ int mt76_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
 int mt76_testmode_set_state(struct mt76_phy *phy, enum mt76_testmode_state state);
 int mt76_testmode_alloc_skb(struct mt76_phy *phy, u32 len);
 
-#ifdef CONFIG_MT76_NPU
+#if IS_ENABLED(CONFIG_MT76_NPU)
 void mt76_npu_check_ppe(struct mt76_dev *dev, struct sk_buff *skb,
                        u32 info);
 int mt76_npu_dma_add_buf(struct mt76_phy *phy, struct mt76_queue *q,