netdev - [patch] tehuti: return -EFAULT on copy_to

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Date:	Thu, 3 Jun 2010 12:05:35 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Alexander Indenbaum <baum@...utinetworks.net>
Cc:	Andy Gospodarek <andy@...yhouse.net>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Pirko <jpirko@...hat.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] tehuti: return -EFAULT on copy_to_user errors

copy_to_user() returns the number of bytes remaining but we want to
return a negative error code here.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/drivers/net/tehuti.c b/drivers/net/tehuti.c
index 20ab161..737df60 100644
--- a/drivers/net/tehuti.c
+++ b/drivers/net/tehuti.c
@@ -646,7 +646,7 @@ static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
 		error = copy_from_user(data, ifr->ifr_data, sizeof(data));
 		if (error) {
 			pr_err("cant copy from user\n");
-			RET(error);
+			RET(-EFAULT);
 		}
 		DBG("%d 0x%x 0x%x\n", data[0], data[1], data[2]);
 	}
@@ -665,7 +665,7 @@ static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
 		    data[2]);
 		error = copy_to_user(ifr->ifr_data, data, sizeof(data));
 		if (error)
-			RET(error);
+			RET(-EFAULT);
 		break;
 
 	case BDX_OP_WRITE:
--
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