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 <redacted>
---
 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 4dca5641b774..b597d338d6f7 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c

@@ -491,6 +491,10 @@ static int lm3533_i2c_probe(struct i2c_client *i2c)
 				   LM3533_BOOST_FREQ_MAX);
 	lm3533->boost_freq = lm3533->boost_freq / (500 * KILO) - 1;
 
+	/* LM3533 and child devices do not use DMA */
+	i2c->dev.coherent_dma_mask = 0;
+	i2c->dev.dma_mask = &i2c->dev.coherent_dma_mask;
+
 	return lm3533_device_init(lm3533);
 }
 

-- 
2.51.0