From 4a92d697ce5bbfc60d9a5025d14a282e9e058b9e Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Wed, 18 Dec 2019 16:32:27 +0100 Subject: [PATCH] s390/qeth: fix promiscuous mode after reset [ Upstream commit 0f399305cd31e5c813086eaa264f7f47e205c10e ] When managing the promiscuous mode during an RX modeset, qeth caches the current HW state to avoid repeated programming of the same state on each modeset. But while tearing down a device, we forget to clear the cached state. So when the device is later set online again, the initial RX modeset doesn't program the promiscuous mode since we believe it is already enabled. Fix this by clearing the cached state in the tear-down path. Note that for the SBP variant of promiscuous mode, this accidentally works right now because we unconditionally restore the SBP role while re-initializing. Fixes: 4a71df50047f ("qeth: new qeth device driver") Signed-off-by: Julian Wiedmann Reviewed-by: Alexandra Winter Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/s390/net/qeth_l2_main.c | 1 + drivers/s390/net/qeth_l2_sys.c | 3 ++- drivers/s390/net/qeth_l3_main.c | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 4bccdce19b5ad..8b7d911dccd8d 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -295,6 +295,7 @@ static void qeth_l2_stop_card(struct qeth_card *card) flush_workqueue(card->event_wq); card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; + card->info.promisc_mode = 0; } static int qeth_l2_process_inbound_buffer(struct qeth_card *card, diff --git a/drivers/s390/net/qeth_l2_sys.c b/drivers/s390/net/qeth_l2_sys.c index e2bcb26105a35..fc7101ad84dee 100644 --- a/drivers/s390/net/qeth_l2_sys.c +++ b/drivers/s390/net/qeth_l2_sys.c @@ -279,7 +279,8 @@ void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card) return; mutex_lock(&card->sbp_lock); - if (card->options.sbp.role != QETH_SBP_ROLE_NONE) { + if (!card->options.sbp.reflect_promisc && + card->options.sbp.role != QETH_SBP_ROLE_NONE) { /* Conditional to avoid spurious error messages */ qeth_bridgeport_setrole(card, card->options.sbp.role); /* Let the callback function refresh the stored role value. */ diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index d7bfc7a0e4c07..32385327539b7 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1433,6 +1433,7 @@ static void qeth_l3_stop_card(struct qeth_card *card) } flush_workqueue(card->event_wq); + card->info.promisc_mode = 0; } static void qeth_l3_set_promisc_mode(struct qeth_card *card) -- 2.47.3