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SubjectRe: [RFC: 2.6 patch] drivers/net/wireless/airo.c: correct a wrong
On Tue, Mar 22, 2005 at 05:17:21PM -0500, Jeff Garzik wrote:
> Adrian Bunk wrote:
> >if
> >Reply-To:
> >
> >The Coverity checker correctly noted that this condition can't ever be
> >fulfilled.
> >
> >Can someone understanding this code check whether my guess what this
> >should have been was right?
> >
> >Or should the if get completely dropped?
> >
> >Signed-off-by: Adrian Bunk <bunk@stusta.de>
> >
> >--- linux-2.6.12-rc1-mm1-full/drivers/net/wireless/airo.c.old 2005-03-22
> >21:41:37.000000000 +0100
> >+++ linux-2.6.12-rc1-mm1-full/drivers/net/wireless/airo.c 2005-03-22
> >21:42:01.000000000 +0100
> >@@ -3440,9 +3440,6 @@
> > /* Make sure we got something */
> > if (rxd.rdy && rxd.valid == 0) {
> > len = rxd.len + 12;
> >- if (len < 12 && len > 2048)
> >- goto badrx;
>
> Coverity is silly.
>
> len is signed, and so can obviously be less than zero in edge cases. I
> don't see where the "> 2048" test is invalid, either.

But if it's less than zero it can't be > 2048 at the same time?
The point is: len can't be both < 12 and > 2048 at the same time.

Is this "if" simply superfluous?
Or should the && be an || ?

> Jeff

cu
Adrian

--

"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed

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