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[PATCH 11/11] gpio: xlp: fix error return code

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  [PATCH 11/11] gpio: xlp: fix error return code Julia Lawall <Julia.Lawall@lip6.fr> - 2015-08-23 02:30 +0200
    Re: [PATCH 11/11] gpio: xlp: fix error return code Linus Walleij <linus.walleij@linaro.org> - 2015-08-26 15:00 +0200

#1211545 — [PATCH 11/11] gpio: xlp: fix error return code

Return a negative error code on failure.

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

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret = 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/gpio/gpio-xlp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-xlp.c b/drivers/gpio/gpio-xlp.c
index 9bdab72..e02499a 100644
--- a/drivers/gpio/gpio-xlp.c
+++ b/drivers/gpio/gpio-xlp.c
@@ -387,7 +387,7 @@ static int xlp_gpio_probe(struct platform_device *pdev)
 	irq_base = irq_alloc_descs(-1, XLP_GPIO_IRQ_BASE, gc->ngpio, 0);
 	if (irq_base < 0) {
 		dev_err(&pdev->dev, "Failed to allocate IRQ numbers\n");
-		return err;
+		return -ENODEV;
 	}
 
 	err = gpiochip_add(gc);

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#1213830

On Sun, Aug 23, 2015 at 2:11 AM, Julia Lawall <Julia.Lawall@lip6.fr> wrote:

> Return a negative error code on failure.
>
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@
> identifier ret; expression e1,e2;
> @@
> (
> if (\(ret < 0\|ret != 0\))
>  { ... return ret; }
> |
> ret = 0
> )
> ... when != ret = e1
>     when != &ret
> *if(...)
> {
>   ... when != ret = e2
>       when forall
>  return ret;
> }
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Patch applied.

Yours,
Linus Walleij
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