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s390/qeth: fix promiscuous mode after reset

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[ Upstream commit 0f399305cd ]

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: 4a71df5004 ("qeth: new qeth device driver")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Julian Wiedmann
2019-12-18 16:32:27 +01:00
committed by Greg Kroah-Hartman
parent b652dba24c
commit 4a92d697ce
3 changed files with 4 additions and 1 deletions
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1
drivers/s390/net/qeth_l2_main.c
View File

@@ -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,

3
drivers/s390/net/qeth_l2_sys.c
View File

@@ -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. */

1
drivers/s390/net/qeth_l3_main.c
View File

@@ -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)