mt76x0: use bus helper to identify rf access method

Use mt76_is_usb() to identify RF access method instead of
MT76_STATE_MCU_RUNNING flag and add warning since MCU has
to be initialized before we can access RF registers via MCU.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
index d4483a5ab056..e2b62ce2306b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -111,12 +111,14 @@ out:
 static int
 rf_wr(struct mt76x02_dev *dev, u32 offset, u8 val)
 {
-        if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mt76.state)) {
+        if (mt76_is_usb(dev)) {
                 struct mt76_reg_pair pair = {
                         .reg = offset,
                         .value = val,
                 };
 
+                WARN_ON_ONCE(!test_bit(MT76_STATE_MCU_RUNNING,
+                             &dev->mt76.state));
                 return mt76_wr_rp(dev, MT_MCU_MEMMAP_RF, &pair, 1);
         } else {
                 return mt76x0_rf_csr_wr(dev, offset, val);
@@ -129,11 +131,13 @@ rf_rr(struct mt76x02_dev *dev, u32 offset)
         int ret;
         u32 val;
 
-        if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mt76.state)) {
+        if (mt76_is_usb(dev)) {
                 struct mt76_reg_pair pair = {
                         .reg = offset,
                 };
 
+                WARN_ON_ONCE(!test_bit(MT76_STATE_MCU_RUNNING,
+                             &dev->mt76.state));
                 ret = mt76_rd_rp(dev, MT_MCU_MEMMAP_RF, &pair, 1);
                 val = pair.value;
         } else {