[5/20,V2] drivers/net/ethernet/sis/sis900.c: fix error return code

Submitted by Peter Senna Tschudin on Oct. 5, 2012, 8:41 p.m.

Details

Message ID 1349469667-6137-5-git-send-email-peter.senna@gmail.com
State Accepted
Headers show

Commit Message

Peter Senna Tschudin Oct. 5, 2012, 8:41 p.m.
From: Peter Senna Tschudin <peter.senna@gmail.com>

The function sis900_probe() return 0 for success and negative value
for most of its internal tests failures. There is one exception
that is error case going to err_out_cleardev:. Fore this error case,
the function abort its success execution path, but returns non negative
value, making it difficult for a caller function to notice the error.

This patch fixes the error case that do not return negative value.

This was found by Coccinelle, but the code change was made by hand.
This patch is not robot generated.

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: Peter Senna Tschudin <peter.senna@gmail.com>

---
Change from V1:
        Updated commit message. See:
        http://www.kernelhub.org/?p=2&msg=139319

 drivers/net/ethernet/sis/sis900.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)


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Comments

David Miller Oct. 7, 2012, 6:38 p.m.
Applied.
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Patch hide | download patch | download mbox

diff --git a/drivers/net/ethernet/sis/sis900.c b/drivers/net/ethernet/sis/sis900.c
index 203d9c6..fb9f6b3 100644
--- a/drivers/net/ethernet/sis/sis900.c
+++ b/drivers/net/ethernet/sis/sis900.c
@@ -478,8 +478,10 @@  static int __devinit sis900_probe(struct pci_dev *pci_dev,
 
 	/* IO region. */
 	ioaddr = pci_iomap(pci_dev, 0, 0);
-	if (!ioaddr)
+	if (!ioaddr) {
+		ret = -ENOMEM;
 		goto err_out_cleardev;
+	}
 
 	sis_priv = netdev_priv(net_dev);
 	sis_priv->ioaddr = ioaddr;