linux-kernel - [PATCH] gianfar: fix signedness issue

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Message-ID: <20101115215942.354b0394@absol.kitzblitz>
Date:	Mon, 15 Nov 2010 21:59:42 +0100
From:	Nicolas Kaiser <nikai@...ai.net>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] gianfar: fix signedness issue

irq_of_parse_and_map() has an unsigned return type.
Testing for a negative error value doesn't work here.

Signed-off-by: Nicolas Kaiser <nikai@...ai.net>
---
I see that in numerous places the return value is tested
for NO_IRQ. I hope it's the right thing to do here as well?

 drivers/net/gianfar.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 49e4ce1..d1bec62 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -577,11 +577,10 @@ static int gfar_parse_group(struct device_node *np,
 			irq_of_parse_and_map(np, 1);
 		priv->gfargrp[priv->num_grps].interruptError =
 			irq_of_parse_and_map(np,2);
-		if (priv->gfargrp[priv->num_grps].interruptTransmit < 0 ||
-			priv->gfargrp[priv->num_grps].interruptReceive < 0 ||
-			priv->gfargrp[priv->num_grps].interruptError < 0) {
+		if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ ||
+		    priv->gfargrp[priv->num_grps].interruptReceive  == NO_IRQ ||
+		    priv->gfargrp[priv->num_grps].interruptError    == NO_IRQ)
 			return -EINVAL;
-		}
 	}
 
 	priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;
-- 
1.7.2.2
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