From: Julia Lawall <Julia.Lawall@lip6.fr>
Date: Wed, 6 Aug 2014 20:12:15 +0000 (+0200)
Subject: mfd: twl6040: Fix error return code
X-Git-Tag: firefly_0821_release~176^2~3031^2~64
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f2b86781619c0822b4e0b561ef9aa499b5ed76ff;p=firefly-linux-kernel-4.4.55.git

mfd: twl6040: Fix error return code

Convert a zero return value on error to a negative one, as returned
elsewhere in the function.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index f9c06c542a41..9687645162ae 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -679,6 +679,7 @@ static int twl6040_probe(struct i2c_client *client,
 	if (twl6040->rev < 0) {
 		dev_err(&client->dev, "Failed to read revision register: %d\n",
 			twl6040->rev);
+		ret = twl6040->rev;
 		goto gpio_err;
 	}