We may have an error when reading the revision register, so check for
the returned value.
Signed-off-by: Florian Vaussard <florian.vaussard@xxxxxxx>
---
drivers/mfd/twl6040.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index 32ce1ae..67e524e 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -661,6 +661,11 @@ static int twl6040_probe(struct i2c_client *client,
init_completion(&twl6040->ready);
twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
+ if (twl6040->rev < 0) {
+ dev_err(&client->dev, "Failed to read revision register: %d\n",
+ twl6040->rev);
+ goto gpio_err;
+ }
/* ERRATA: Automatic power-up is not possible in ES1.0 */
if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
--
1.8.1.2
--
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