Commit c14ea0ca authored by Julia Lawall's avatar Julia Lawall Committed by David S. Miller

drivers/net/wan: Remove redundant test

arg is checked not to be NULL a few lines before.

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: default avatarJulia Lawall <julia@diku.dk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 90f5dfcc
......@@ -2718,9 +2718,8 @@ static int cpc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
}
pc300patrntst.num_errors =
falc_pattern_test_error(card, ch);
if (!arg
|| copy_to_user(arg, &pc300patrntst,
sizeof (pc300patterntst_t)))
if (copy_to_user(arg, &pc300patrntst,
sizeof(pc300patterntst_t)))
return -EINVAL;
} else {
falc_pattern_test(card, ch, pc300patrntst.patrntst_on);
......
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