elants_i2c_send() may fail, let's check its return values. The fix does the check and reports an error message upon the failure.
Signed-off-by: Kangjie Lu <[email protected]> --- drivers/input/touchscreen/elants_i2c.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index f2cb23121833..cb3c1470bb68 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -245,8 +245,14 @@ static int elants_i2c_calibrate(struct elants_data *ts) ts->state = ELAN_WAIT_RECALIBRATION; reinit_completion(&ts->cmd_done); - elants_i2c_send(client, w_flashkey, sizeof(w_flashkey)); - elants_i2c_send(client, rek, sizeof(rek)); + error = elants_i2c_send(client, w_flashkey, sizeof(w_flashkey)); + error |= elants_i2c_send(client, rek, sizeof(rek)); + if (error) { + dev_err(&client->dev, + "error in sending I2C messages for calibration: %d\n", + error); + return error; + } enable_irq(client->irq); -- 2.17.2 (Apple Git-113)
