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| author | Julian Wiedmann <jwi@linux.ibm.com> | 2020-09-23 10:36:57 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-23 12:07:54 -0700 |
| commit | 7fb7fe5c7bacb1b1189b779f7f81c785bfc964a4 (patch) | |
| tree | 675f2b9cba28732df8b1f0fed45f1e5be58858aa | |
| parent | f3380b1edc1dd06d874227570a5fe0fbf50eb607 (diff) | |
| download | linux-7fb7fe5c7bacb1b1189b779f7f81c785bfc964a4.tar.gz linux-7fb7fe5c7bacb1b1189b779f7f81c785bfc964a4.tar.bz2 linux-7fb7fe5c7bacb1b1189b779f7f81c785bfc964a4.zip | |
s390/qeth: cancel cmds earlier during teardown
Originators of cmd IO typically hold the rtnl or conf_mutex to protect
against a concurrent teardown.
Since qeth_set_offline() already holds the conf_mutex, the main reason
why we still care about cancelling pending cmds is so that they release
the rtnl when we need it ourselves.
So move this step a little earlier into the teardown sequence.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 1 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 6 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 4 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 1 |
4 files changed, 5 insertions, 7 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index f931b764d6a4..711ab5097bd1 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -1067,7 +1067,6 @@ void qeth_put_cmd(struct qeth_cmd_buffer *iob); int qeth_schedule_recovery(struct qeth_card *card); void qeth_flush_local_addrs(struct qeth_card *card); int qeth_poll(struct napi_struct *napi, int budget); -void qeth_clear_ipacmd_list(struct qeth_card *); int qeth_qdio_clear_card(struct qeth_card *, int); void qeth_clear_working_pool_list(struct qeth_card *); void qeth_drain_output_queues(struct qeth_card *card); diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 7cd0cbf8a4f0..286787845cae 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -965,7 +965,7 @@ static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card, } } -void qeth_clear_ipacmd_list(struct qeth_card *card) +static void qeth_clear_ipacmd_list(struct qeth_card *card) { struct qeth_cmd_buffer *iob; unsigned long flags; @@ -977,7 +977,6 @@ void qeth_clear_ipacmd_list(struct qeth_card *card) qeth_notify_cmd(iob, -ECANCELED); spin_unlock_irqrestore(&card->lock, flags); } -EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list); static int qeth_check_idx_response(struct qeth_card *card, unsigned char *buffer) @@ -5334,6 +5333,9 @@ int qeth_set_offline(struct qeth_card *card, bool resetting) card->info.hwtrap = 1; } + /* cancel any stalled cmd that might block the rtnl: */ + qeth_clear_ipacmd_list(card); + rtnl_lock(); card->info.open_when_online = card->dev->flags & IFF_UP; dev_close(card->dev); diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index e12ac32b8b47..cbd1ab71e785 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -315,10 +315,8 @@ static void qeth_l2_stop_card(struct qeth_card *card) cancel_work_sync(&card->rx_mode_work); qeth_l2_drain_rx_mode_cache(card); - if (card->state == CARD_STATE_SOFTSETUP) { - qeth_clear_ipacmd_list(card); + if (card->state == CARD_STATE_SOFTSETUP) card->state = CARD_STATE_DOWN; - } qeth_qdio_clear_card(card, 0); qeth_drain_output_queues(card); diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 0815b64c9797..410c35ca8f4a 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1158,7 +1158,6 @@ static void qeth_l3_stop_card(struct qeth_card *card) if (card->state == CARD_STATE_SOFTSETUP) { card->state = CARD_STATE_DOWN; qeth_l3_clear_ip_htable(card, 1); - qeth_clear_ipacmd_list(card); } qeth_qdio_clear_card(card, 0); |