linux-kernel - [PATCH 4/16] [media] as102: fix error return code

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Date:	Sun,  5 Apr 2015 14:06:23 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	kernel-janitors@...r.kernel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/16] [media] as102: 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@...6.fr>

---
 drivers/media/usb/as102/as102_drv.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/usb/as102/as102_drv.c b/drivers/media/usb/as102/as102_drv.c
index 8be1474..9dd7c7c 100644
--- a/drivers/media/usb/as102/as102_drv.c
+++ b/drivers/media/usb/as102/as102_drv.c
@@ -337,6 +337,7 @@ int as102_dvb_register(struct as102_dev_t *as102_dev)
 				       &as102_dev->bus_adap,
 				       as102_dev->elna_cfg);
 	if (!as102_dev->dvb_fe) {
+		ret = -ENODEV;
 		dev_err(dev, "%s: as102_attach() failed: %d",
 		    __func__, ret);
 		goto efereg;

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