Missing coherent_dma_mask assigning triggers the following warning in dmesg:
[ 3.287872] platform lm3533-backlight.0: DMA mask not set Since this warning might be elevated to an error in the future, set coherent_dma_mask to zero because both the core and cells do not utilize DMA. Signed-off-by: Svyatoslav Ryhel <[email protected]> --- drivers/mfd/lm3533-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c index 131eb1a1c8eb..c7914afd564c 100644 --- a/drivers/mfd/lm3533-core.c +++ b/drivers/mfd/lm3533-core.c @@ -499,6 +499,10 @@ static int lm3533_i2c_probe(struct i2c_client *i2c) lm3533->have_leds = true; } + /* Parent I2C controller uses DMA, LM3533 and child devices do not */ + i2c->dev.coherent_dma_mask = 0; + i2c->dev.dma_mask = &i2c->dev.coherent_dma_mask; + return lm3533_device_init(lm3533); } -- 2.51.0
