Locking the root adapter for __i2c_transfer will deadlock if the device sits behind a mux-locked I2C mux. Switch to the finer-grained i2c_lock_bus with the I2C_LOCK_SEGMENT flag. If the device does not sit behind a mux-locked mux, the two locking variants are equivalent. Signed-off-by: Peter Rosin <peda@xxxxxxxxxx> --- drivers/media/dvb-frontends/rtl2830.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c index 7bbfe11d11ed..91d12e6a03d5 100644 --- a/drivers/media/dvb-frontends/rtl2830.c +++ b/drivers/media/dvb-frontends/rtl2830.c @@ -24,9 +24,9 @@ static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg, struct rtl2830_dev *dev = i2c_get_clientdata(client); int ret; - i2c_lock_adapter(client->adapter); + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); ret = regmap_bulk_write(dev->regmap, reg, val, val_count); - i2c_unlock_adapter(client->adapter); + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); return ret; } @@ -36,9 +36,9 @@ static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg, struct rtl2830_dev *dev = i2c_get_clientdata(client); int ret; - i2c_lock_adapter(client->adapter); + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); ret = regmap_update_bits(dev->regmap, reg, mask, val); - i2c_unlock_adapter(client->adapter); + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); return ret; } @@ -48,9 +48,9 @@ static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg, struct rtl2830_dev *dev = i2c_get_clientdata(client); int ret; - i2c_lock_adapter(client->adapter); + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); ret = regmap_bulk_read(dev->regmap, reg, val, val_count); - i2c_unlock_adapter(client->adapter); + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); return ret; } -- 2.11.0
