diff options
| author | StanleyYP Wang <StanleyYP.Wang@mediatek.com> | 2026-07-27 15:04:24 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2026-08-01 14:49:43 +0000 |
| commit | eb906eeff2d1e84b628dc210dada325269c71383 (patch) | |
| tree | 718e40439925a3cf1af8c406df3c01ef540a70e0 | |
| parent | 8370aebd26a9dfa2e0de665e3ab504c0e97ee730 (diff) | |
| download | linux-eb906eeff2d1e84b628dc210dada325269c71383.tar.gz linux-eb906eeff2d1e84b628dc210dada325269c71383.zip | |
wifi: mt76: mt7996: fix reg addr remap when addr is 0
When addr is less than the hardcoded threshold in __mt7996_reg_addr,
it indicates that remapping is unnecessary.
Currently, the flow remaps address 0x0 to MT_HIF_REMAP_BASE_L2,
which is incorrect.
To address this, modify __mt7996_reg_addr to return INVALID_REG_ADDR
if the address is not below the hardcoded value or is not present in
the mt7996_reg_map array.
Additionally, update the remap condition to check if addr is equal to
INVALID_REG_ADDR.
Fixes: 3687854d3e7e ("wifi: mt76: mt7996: add locking for accessing mapped registers")
Signed-off-by: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
Link: https://patch.msgid.link/20260727150434.1778520-5-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7996/mmio.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c index de68e60a1e86..0d7521d06981 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c @@ -17,6 +17,8 @@ static bool wed_enable; module_param(wed_enable, bool, 0644); +#define INVALID_REG_ADDR 0xffffffff + static const struct __base mt7996_reg_base[] = { [WF_AGG_BASE] = { { 0x820e2000, 0x820f2000, 0x830e2000 } }, [WF_ARB_BASE] = { { 0x820e3000, 0x820f3000, 0x830e3000 } }, @@ -358,7 +360,7 @@ static u32 __mt7996_reg_addr(struct mt7996_dev *dev, u32 addr) return dev->reg.map[i].mapped + ofs; } - return 0; + return INVALID_REG_ADDR; } static u32 __mt7996_reg_remap_addr(struct mt7996_dev *dev, u32 addr) @@ -390,7 +392,7 @@ void mt7996_memcpy_fromio(struct mt7996_dev *dev, void *buf, u32 offset, { u32 addr = __mt7996_reg_addr(dev, offset); - if (addr) { + if (addr != INVALID_REG_ADDR) { memcpy_fromio(buf, dev->mt76.mmio.regs + addr, len); return; } @@ -406,7 +408,7 @@ static u32 mt7996_rr(struct mt76_dev *mdev, u32 offset) struct mt7996_dev *dev = container_of(mdev, struct mt7996_dev, mt76); u32 addr = __mt7996_reg_addr(dev, offset), val; - if (addr) + if (addr != INVALID_REG_ADDR) return dev->bus_ops->rr(mdev, addr); spin_lock_bh(&dev->reg_lock); @@ -421,7 +423,7 @@ static void mt7996_wr(struct mt76_dev *mdev, u32 offset, u32 val) struct mt7996_dev *dev = container_of(mdev, struct mt7996_dev, mt76); u32 addr = __mt7996_reg_addr(dev, offset); - if (addr) { + if (addr != INVALID_REG_ADDR) { dev->bus_ops->wr(mdev, addr, val); return; } @@ -436,7 +438,7 @@ static u32 mt7996_rmw(struct mt76_dev *mdev, u32 offset, u32 mask, u32 val) struct mt7996_dev *dev = container_of(mdev, struct mt7996_dev, mt76); u32 addr = __mt7996_reg_addr(dev, offset); - if (addr) + if (addr != INVALID_REG_ADDR) return dev->bus_ops->rmw(mdev, addr, mask, val); spin_lock_bh(&dev->reg_lock); |