[PATCH 4.9 04/94] s390/qeth: handle sysfs error during initialization

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ursula Braun <ubr...@linux.vnet.ibm.com>


[ Upstream commit 9111e7880ccf419548c7b0887df020b08eadb075 ]

When setting up the device from within the layer discipline's
probe routine, creating the layer-specific sysfs attributes can fail.
Report this error back to the caller, and handle it by
releasing the layer discipline.

Signed-off-by: Ursula Braun <ubr...@linux.vnet.ibm.com>
[jwi: updated commit msg, moved an OSN change to a subsequent patch]
Signed-off-by: Julian Wiedmann <j...@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/s390/net/qeth_core_main.c |    4 +++-
 drivers/s390/net/qeth_core_sys.c  |    2 ++
 drivers/s390/net/qeth_l2_main.c   |    5 ++++-
 drivers/s390/net/qeth_l3_main.c   |    5 ++++-
 4 files changed, 13 insertions(+), 3 deletions(-)

--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -5663,8 +5663,10 @@ static int qeth_core_set_online(struct c
                if (rc)
                        goto err;
                rc = card->discipline->setup(card->gdev);
-               if (rc)
+               if (rc) {
+                       qeth_core_free_discipline(card);
                        goto err;
+               }
        }
        rc = card->discipline->set_online(gdev);
 err:
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -426,6 +426,8 @@ static ssize_t qeth_dev_layer2_store(str
                goto out;
 
        rc = card->discipline->setup(card->gdev);
+       if (rc)
+               qeth_core_free_discipline(card);
 out:
        mutex_unlock(&card->discipline_mutex);
        return rc ? rc : count;
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1024,8 +1024,11 @@ static int qeth_l2_stop(struct net_devic
 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 {
        struct qeth_card *card = dev_get_drvdata(&gdev->dev);
+       int rc;
 
-       qeth_l2_create_device_attributes(&gdev->dev);
+       rc = qeth_l2_create_device_attributes(&gdev->dev);
+       if (rc)
+               return rc;
        INIT_LIST_HEAD(&card->vid_list);
        hash_init(card->mac_htable);
        card->options.layer2 = 1;
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -3157,8 +3157,11 @@ static int qeth_l3_setup_netdev(struct q
 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
 {
        struct qeth_card *card = dev_get_drvdata(&gdev->dev);
+       int rc;
 
-       qeth_l3_create_device_attributes(&gdev->dev);
+       rc = qeth_l3_create_device_attributes(&gdev->dev);
+       if (rc)
+               return rc;
        card->options.layer2 = 0;
        card->info.hwtrap = 0;
        return 0;