[PATCH net-next 3/9] s390/qeth: unconditionally clear MAC_REGISTERED flag
From: Julian Wiedmann <hidden>
Date: 2019-02-28 18:00:05
Also in:
linux-s390
Subsystem:
networking drivers, s390 architecture, s390 network drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Alexandra Winter, Aswin Karuvally, Linus Torvalds
In its attempt to run only the minimal amount of tear down steps, qeth_l2_stop_card() fails to reset the "is dev_addr registered?" flag in some rare scenarios. But a future change to the tear down sequence would cause us to _always_ hit this issue, so patch it up before that code lands. Fix it by unconditionally clearing the flag bit. This also allows us to remove the additional cleanup step in qeth_dev_layer2_store(). Signed-off-by: Julian Wiedmann <redacted> --- drivers/s390/net/qeth_core_sys.c | 1 - drivers/s390/net/qeth_l2_main.c | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index e24d204b780a..fa575549d288 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c@@ -416,7 +416,6 @@ static ssize_t qeth_dev_layer2_store(struct device *dev, goto out; } - card->info.mac_bits = 0; if (card->discipline) { /* start with a new, pristine netdevice: */ ndev = qeth_clone_netdev(card->dev);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 72e6d08444a7..f71d45ea30da 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c@@ -301,7 +301,6 @@ static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode) dev_close(card->dev); rtnl_unlock(); } - card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; card->state = CARD_STATE_SOFTSETUP; } if (card->state == CARD_STATE_SOFTSETUP) {
@@ -321,6 +320,7 @@ static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode) } flush_workqueue(card->event_wq); + card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; } static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
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2.16.4