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Subject[PATCH 12/25] HID: sony: fix error return code
Date
From: Julia Lawall <Julia.Lawall@lip6.fr>

Currently the return variable ret is always 0. Set it to other values in
error cases, as used in the direct return.

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>

---
Not tested.

drivers/hid/hid-sony.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index b60bc38..f57ab5e 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -585,6 +585,7 @@ static int sony_leds_init(struct hid_device *hdev)
led = kzalloc(sizeof(struct led_classdev) + name_sz, GFP_KERNEL);
if (!led) {
hid_err(hdev, "Couldn't allocate memory for LED %d\n", n);
+ ret = -ENOMEM;
goto error_leds;
}

@@ -596,7 +597,8 @@ static int sony_leds_init(struct hid_device *hdev)
led->brightness_get = sony_led_get_brightness;
led->brightness_set = sony_led_set_brightness;

- if (led_classdev_register(&hdev->dev, led)) {
+ ret = led_classdev_register(&hdev->dev, led);
+ if (ret) {
hid_err(hdev, "Failed to register LED %d\n", n);
kfree(led);
goto error_leds;


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