diff options
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 14 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 12 |
2 files changed, 11 insertions, 15 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 4d29801bcf41..ad0e86aa99b2 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -614,7 +614,6 @@ struct qeth_channel { struct ccw_device *ccwdev; struct qeth_cmd_buffer *active_cmd; enum qeth_channel_states state; - atomic_t irq_pending; }; struct qeth_reply { @@ -664,11 +663,6 @@ static inline struct ccw1 *__ccw_from_cmd(struct qeth_cmd_buffer *iob) return (struct ccw1 *)(iob->data + ALIGN(iob->length, 8)); } -static inline bool qeth_trylock_channel(struct qeth_channel *channel) -{ - return atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0; -} - /** * OSA card related definitions */ @@ -896,10 +890,16 @@ static inline bool qeth_use_tx_irqs(struct qeth_card *card) static inline void qeth_unlock_channel(struct qeth_card *card, struct qeth_channel *channel) { - atomic_set(&channel->irq_pending, 0); + xchg(&channel->active_cmd, NULL); wake_up(&card->wait_q); } +static inline bool qeth_trylock_channel(struct qeth_channel *channel, + struct qeth_cmd_buffer *cmd) +{ + return cmpxchg(&channel->active_cmd, NULL, cmd) == NULL; +} + struct qeth_trap_id { __u16 lparnr; char vmname[8]; diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index f22f223a4a6c..83d540f8b527 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1268,7 +1268,6 @@ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm, iob = (struct qeth_cmd_buffer *) (addr_t)intparm; } - channel->active_cmd = NULL; qeth_unlock_channel(card, channel); rc = qeth_check_irb_error(card, cdev, irb); @@ -1715,11 +1714,10 @@ static int qeth_stop_channel(struct qeth_channel *channel) rc = ccw_device_set_offline(cdev); spin_lock_irq(get_ccwdev_lock(cdev)); - if (channel->active_cmd) { + if (channel->active_cmd) dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n", channel->active_cmd); - channel->active_cmd = NULL; - } + cdev->handler = NULL; spin_unlock_irq(get_ccwdev_lock(cdev)); @@ -1732,7 +1730,7 @@ static int qeth_start_channel(struct qeth_channel *channel) int rc; channel->state = CH_STATE_DOWN; - atomic_set(&channel->irq_pending, 0); + xchg(&channel->active_cmd, NULL); spin_lock_irq(get_ccwdev_lock(cdev)); cdev->handler = qeth_irq; @@ -2039,7 +2037,7 @@ static int qeth_send_control_data(struct qeth_card *card, reply->param = reply_param; timeout = wait_event_interruptible_timeout(card->wait_q, - qeth_trylock_channel(channel), + qeth_trylock_channel(channel, iob), timeout); if (timeout <= 0) { qeth_put_cmd(iob); @@ -2059,8 +2057,6 @@ static int qeth_send_control_data(struct qeth_card *card, spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob), (addr_t) iob, 0, 0, timeout); - if (!rc) - channel->active_cmd = iob; spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); if (rc) { QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n", |