qeth: fix uaccess handling and get rid of unused variable

[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@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 2bde4f1fb9c2..f17d7cfb4207 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -2560,7 +2560,6 @@ qeth_process_inbound_buffer(struct qeth_card *card,
         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, char __user *udata)
                            "(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, char __user *udata)
         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);