From 2f05e1d4458f9cb68d4d36fb47e6830fec03c80e Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Sun, 2 Dec 2012 09:29:30 -0800 Subject: [PATCH] leds: leds-lp5521: return an error code on error in probe() If "buf" wasn't equal to LP5521_REG_R_CURR_DEFAULT the probe fails but we still return zero. I've changed it to print an error message and return -EINVAL. Reported-by: Ben Hutchings Signed-off-by: Dan Carpenter Signed-off-by: Bryan Wu --- drivers/leds/leds-lp5521.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 8505afe..ddc4315 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -788,10 +788,17 @@ static int __devinit lp5521_probe(struct i2c_client *client, * LP5521_REG_ENABLE register will not have any effect - strange! */ ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf); - if (ret || buf != LP5521_REG_R_CURR_DEFAULT) { + if (ret) { dev_err(&client->dev, "error in resetting chip\n"); goto fail2; } + if (buf != LP5521_REG_R_CURR_DEFAULT) { + dev_err(&client->dev, + "unexpected data in register (expected 0x%x got 0x%x)\n", + LP5521_REG_R_CURR_DEFAULT, buf); + ret = -EINVAL; + goto fail2; + } usleep_range(10000, 20000); ret = lp5521_detect(client); -- 2.7.4