From: Julia Lawall <julia@diku.dk>
Date: Fri, 26 Dec 2008 02:02:49 +0000 (-0800)
Subject: drivers/net/au1000_eth.c: Remove redundant test
X-Git-Tag: v2.6.29-rc1~581^2~70
X-Git-Url: http://ftp.safe.ca/?a=commitdiff_plain;h=b0fd0d235df2b3cf8e5e244e301614092a9c317c;hp=c062076cc999795af19ff61d8c76f33e5ceb9ca0;p=safe%2Fjmp%2Flinux-2.6

drivers/net/au1000_eth.c: Remove redundant test

phydev is checked to be not NULL a few lines above.

A simplified version of the semantic patch that makes this change is as
follows: (http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
expression E;
position p1,p2;
@@

if (x@p1 == NULL || ...) { ... when forall
   return ...; }
... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\)
(
x@p2 == NULL
|
x@p2 != NULL
)

// another path to the test that is not through p1?
@s exists@
local idexpression r.x;
position r.p1,r.p2;
@@

... when != x@p1
(
x@p2 == NULL
|
x@p2 != NULL
)

@fix depends on !s@
position r.p1,r.p2;
expression x,E;
statement S1,S2;
@@

(
- if ((x@p2 != NULL) || ...)
  S1
|
- if ((x@p2 == NULL) && ...) S1
|
- BUG_ON(x@p2 == NULL);
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index ecc2573..9c875bb 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -353,7 +353,6 @@ static int mii_probe (struct net_device *dev)
 	}
 
 	/* now we are supposed to have a proper phydev, to attach to... */
-	BUG_ON(!phydev);
 	BUG_ON(phydev->attached_dev);
 
 	phydev = phy_connect(dev, phydev->dev.bus_id, &au1000_adjust_link, 0,