linux-kernel - [PATCH] drivers/isdn: eliminate duplicated test

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Message-ID: <Pine.LNX.4.64.0912081951140.28834@ask.diku.dk>
Date:	Tue, 8 Dec 2009 19:51:34 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	isdn@...ux-pingi.de, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH] drivers/isdn: eliminate duplicated test

From: Julia Lawall <julia@...u.dk>

The code checked slot_rx twice.  Check slot_tx by analogy with the bank
case.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E;
@@

(
*E && E
|
*E || E
)
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/isdn/hardware/mISDN/hfcmulti.c         |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index a6624ad..1a1420d 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -3152,7 +3152,7 @@ static void
 hfcmulti_pcm(struct hfc_multi *hc, int ch, int slot_tx, int bank_tx,
     int slot_rx, int bank_rx)
 {
-	if (slot_rx < 0 || slot_rx < 0 || bank_tx < 0 || bank_rx < 0) {
+	if (slot_tx < 0 || slot_rx < 0 || bank_tx < 0 || bank_rx < 0) {
 		/* disable PCM */
 		mode_hfcmulti(hc, ch, hc->chan[ch].protocol, -1, 0, -1, 0);
 		return;
--
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