netdev - [patch] qeth: fix uaccess handling and get rid of unused variable

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Date:	Thu, 28 Dec 2006 13:05:36 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Andrew Morton <akpm@...l.org>, Jeff Garzik <jgarzik@...ox.com>,
	"David S. Miller" <davem@...emloft.net>,
	Frank Pavlic <fpavlic@...ibm.com>
Cc:	netdev@...r.kernel.org
Subject: [patch] qeth: fix uaccess handling and get rid of unused variable

From: Heiko Carstens <heiko.carstens@...ibm.com>

[patch] qeth: fix uaccess handling and get rid of unused variable

drivers/s390/net/qeth_main.c: In function `qeth_process_inbound_buffer':
drivers/s390/net/qeth_main.c:2563: warning: unused variable `vlan_addr'

include/asm/uaccess.h: In function `qeth_do_ioctl':
drivers/s390/net/qeth_main.c:4847: warning:
 ignoring return value of `copy_to_user'
drivers/s390/net/qeth_main.c:4849: warning:
 ignoring return value of `copy_to_user'
drivers/s390/net/qeth_main.c:4996: warning:
 ignoring return value of `copy_to_user'

Cc: Frank Pavlic <fpavlic@...ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---
 drivers/s390/net/qeth_main.c |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

Index: linux-2.6/drivers/s390/net/qeth_main.c
===================================================================
--- linux-2.6.orig/drivers/s390/net/qeth_main.c
+++ linux-2.6/drivers/s390/net/qeth_main.c
@@ -2560,7 +2560,6 @@ qeth_process_inbound_buffer(struct qeth_
 	int offset;
 	int rxrc;
 	__u16 vlan_tag = 0;
-	__u16 *vlan_addr;
 
 	/* get first element of current buffer */
 	element = (struct qdio_buffer_element *)&buf->buffer->element[0];
@@ -4844,9 +4843,11 @@ qeth_arp_query(struct qeth_card *card, c
 			   "(0x%x/%d)\n",
 			   QETH_CARD_IFNAME(card), qeth_arp_get_error_cause(&rc),
 			   tmp, tmp);
-		copy_to_user(udata, qinfo.udata, 4);
+		if (copy_to_user(udata, qinfo.udata, 4))
+			rc = -EFAULT;
 	} else {
-		copy_to_user(udata, qinfo.udata, qinfo.udata_len);
+		if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
+			rc = -EFAULT;
 	}
 	kfree(qinfo.udata);
 	return rc;
@@ -4992,8 +4993,10 @@ qeth_snmp_command(struct qeth_card *card
 	if (rc)
 		PRINT_WARN("SNMP command failed on %s: (0x%x)\n",
 			   QETH_CARD_IFNAME(card), rc);
-	 else
-		copy_to_user(udata, qinfo.udata, qinfo.udata_len);
+	else {
+		if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
+			rc = -EFAULT;
+	}
 
 	kfree(ureq);
 	kfree(qinfo.udata);
-
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