linux-kernel - [PATCH v2] prism54: prism54_get_encode() test below 0 on unsigned index

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Message-ID: <4811299A.7060407@tiscali.nl>
Date:	Fri, 25 Apr 2008 02:45:14 +0200
From:	Roel Kluin <12o3l@...cali.nl>
To:	Dan Williams <dcbw@...hat.com>
CC:	mcgrof@...il.com, linux-wireless@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] prism54: prism54_get_encode() test below 0 on unsigned
 index

Dan Williams wrote:
> On Wed, 2008-04-23 at 21:56 +0200, Roel Kluin wrote:

>> u32 index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
> 
> Probably should just change that to an 'int' instead of a u32.
> 
> Dan
> 

Thanks, in that case use the patch below
---
when left unsigned, the test 'if (index < 0)' will not work.

Signed-off-by: Roel Kluin <12o3l@...cali.nl>
---
diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index e5b3c28..8076ead 100644
--- a/drivers/net/wireless/prism54/isl_ioctl.c
+++ b/drivers/net/wireless/prism54/isl_ioctl.c
@@ -1158,7 +1158,8 @@ prism54_get_encode(struct net_device *ndev, struct iw_request_info *info,
 {
 	islpci_private *priv = netdev_priv(ndev);
 	struct obj_key *key;
-	u32 devindex, index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
+	u32 devindex;
+	int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
 	u32 authen = 0, invoke = 0, exunencrypt = 0;
 	int rvalue;
 	union oid_res_t r;

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