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Subject[PATCH 2/4] mfd: twl6040: fix error return code
Date
From: Julia Lawall <Julia.Lawall@lip6.fr>

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>

---
drivers/mfd/twl6040.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index f9c06c5..9687645 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;
}



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