linux-kernel - Re: [PATCH 6/9] drivers/net/wireless/iwlwifi/iwl-4965.c: Correct use of ! and &

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Date:	Wed, 27 Feb 2008 00:47:56 +0200
From:	"Tomas Winkler" <tomasw@...il.com>
To:	"Julia Lawall" <julia@...u.dk>
Cc:	yi.zhu@...el.com, linux-wireless@...r.kernel.org,
	ipw3945-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 6/9] drivers/net/wireless/iwlwifi/iwl-4965.c: Correct use of ! and &

On Tue, Feb 26, 2008 at 10:44 PM, Julia Lawall <julia@...u.dk> wrote:
> From: Julia Lawall <julia@...u.dk>
>
>  In commit e6bafba5b4765a5a252f1b8d31cbf6d2459da337, a bug was fixed that
>  involved converting !x & y to !(x & y).  The code below shows the same
>  pattern, and thus should perhaps be fixed in the same way.
>
>  This is not tested and clearly changes the semantics, so it is only
>  something to consider.
>
>  The semantic patch that makes this change is as follows:
>  (http://www.emn.fr/x-info/coccinelle/)
>
>  // <smpl>
>  @@ expression E1,E2; @@
>  (
>   !E1 & !E2
>  |
>  - !E1 & E2
>  + !(E1 & E2)
>  )
>  // </smpl>
>
>  Signed-off-by: Julia Lawall <julia@...u.dk>
>
>  ---
>
>  diff -u -p a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
>  --- a/drivers/net/wireless/iwlwifi/iwl-4965.c 2008-02-05 20:56:01.000000000 +0100
>  +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c 2008-02-26 08:09:12.000000000 +0100
>  @@ -4589,7 +4589,7 @@ static u8 iwl4965_is_fat_tx_allowed(stru
>
>         if (sta_ht_inf) {
>                 if ((!sta_ht_inf->ht_supported) ||
>  -                  (!sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH))
>  +                  (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
>                         return 0;
>         }

The patch was already submitted by Roel Kluin '[PATCH]
[wireless/iwlwifi/iwl-4965.c] add parentheses' I've acked it.
Didn't track it if it's actually committed into tree... John, Reinette ?

Thanks
Tomas


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