diff options
author | Julian Wiedmann <jwi@linux.ibm.com> | 2018-08-09 14:47:59 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-08-09 14:02:50 -0700 |
commit | 750b162598ec5b65cdb44d18f050b45cb7f8d31b (patch) | |
tree | 142fdfd1d092254a18c00d7156c26321d4ec0a9f | |
parent | 73657a3e5b0de69ccdabed0e340dcbbc99f46119 (diff) | |
download | linux-750b162598ec5b65cdb44d18f050b45cb7f8d31b.tar.bz2 |
s390/qeth: reduce hard-coded access to ccw channels
Where possible use accessor macros and local pointers to access the ccw
channels. This makes it less likely to miss a spot.
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_main.c | 46 | ||||
-rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 13 |
2 files changed, 31 insertions, 28 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index da9ac2129869..e459894e1926 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -534,13 +534,14 @@ static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue) static int __qeth_issue_next_read(struct qeth_card *card) { - int rc; + struct qeth_channel *channel = &card->read; struct qeth_cmd_buffer *iob; + int rc; QETH_CARD_TEXT(card, 5, "issnxrd"); - if (card->read.state != CH_STATE_UP) + if (channel->state != CH_STATE_UP) return -EIO; - iob = qeth_get_buffer(&card->read); + iob = qeth_get_buffer(channel); if (!iob) { dev_warn(&card->gdev->dev, "The qeth device driver " "failed to recover an error on the device\n"); @@ -548,14 +549,14 @@ static int __qeth_issue_next_read(struct qeth_card *card) "available\n", dev_name(&card->gdev->dev)); return -ENOMEM; } - qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE); + qeth_setup_ccw(channel, iob->data, QETH_BUFSIZE); QETH_CARD_TEXT(card, 6, "noirqpnd"); - rc = ccw_device_start(card->read.ccwdev, &card->read.ccw, + rc = ccw_device_start(channel->ccwdev, &channel->ccw, (addr_t) iob, 0, 0); if (rc) { QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! " "rc=%i\n", dev_name(&card->gdev->dev), rc); - atomic_set(&card->read.irq_pending, 0); + atomic_set(&channel->irq_pending, 0); card->read_or_write_problem = 1; qeth_schedule_recovery(card); wake_up(&card->wait_q); @@ -1987,20 +1988,20 @@ static void qeth_idx_write_cb(struct qeth_channel *channel, if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) { if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL) - dev_err(&card->write.ccwdev->dev, + dev_err(&channel->ccwdev->dev, "The adapter is used exclusively by another " "host\n"); else QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:" " negative reply\n", - dev_name(&card->write.ccwdev->dev)); + dev_name(&channel->ccwdev->dev)); goto out; } memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) { QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: " "function level mismatch (sent: 0x%x, received: " - "0x%x)\n", dev_name(&card->write.ccwdev->dev), + "0x%x)\n", dev_name(&channel->ccwdev->dev), card->info.func_level, temp); goto out; } @@ -2028,20 +2029,20 @@ static void qeth_idx_read_cb(struct qeth_channel *channel, if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) { switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) { case QETH_IDX_ACT_ERR_EXCL: - dev_err(&card->write.ccwdev->dev, + dev_err(&channel->ccwdev->dev, "The adapter is used exclusively by another " "host\n"); break; case QETH_IDX_ACT_ERR_AUTH: case QETH_IDX_ACT_ERR_AUTH_USER: - dev_err(&card->read.ccwdev->dev, + dev_err(&channel->ccwdev->dev, "Setting the device online failed because of " "insufficient authorization\n"); break; default: QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:" " negative reply\n", - dev_name(&card->read.ccwdev->dev)); + dev_name(&channel->ccwdev->dev)); } QETH_CARD_TEXT_(card, 2, "idxread%c", QETH_IDX_ACT_CAUSE_CODE(iob->data)); @@ -2052,7 +2053,7 @@ static void qeth_idx_read_cb(struct qeth_channel *channel, if (temp != qeth_peer_func_level(card->info.func_level)) { QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function " "level mismatch (sent: 0x%x, received: 0x%x)\n", - dev_name(&card->read.ccwdev->dev), + dev_name(&channel->ccwdev->dev), card->info.func_level, temp); goto out; } @@ -2069,7 +2070,7 @@ out: void qeth_prepare_control_data(struct qeth_card *card, int len, struct qeth_cmd_buffer *iob) { - qeth_setup_ccw(&card->write, iob->data, len); + qeth_setup_ccw(iob->channel, iob->data, len); iob->callback = qeth_release_buffer; memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), @@ -2116,6 +2117,7 @@ int qeth_send_control_data(struct qeth_card *card, int len, unsigned long cb_cmd), void *reply_param) { + struct qeth_channel *channel = iob->channel; int rc; unsigned long flags; struct qeth_reply *reply = NULL; @@ -2125,7 +2127,7 @@ int qeth_send_control_data(struct qeth_card *card, int len, QETH_CARD_TEXT(card, 2, "sendctl"); if (card->read_or_write_problem) { - qeth_release_buffer(iob->channel, iob); + qeth_release_buffer(channel, iob); return -EIO; } reply = qeth_alloc_reply(card); @@ -2137,7 +2139,7 @@ int qeth_send_control_data(struct qeth_card *card, int len, init_waitqueue_head(&reply->wait_q); - while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ; + while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ; if (IS_IPA(iob->data)) { cmd = __ipa_cmd(iob); @@ -2157,21 +2159,21 @@ int qeth_send_control_data(struct qeth_card *card, int len, timeout = jiffies + event_timeout; QETH_CARD_TEXT(card, 6, "noirqpnd"); - spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags); - rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw, + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw, (addr_t) iob, 0, 0, event_timeout); - spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags); + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); if (rc) { QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: " "ccw_device_start rc = %i\n", - dev_name(&card->write.ccwdev->dev), rc); + dev_name(&channel->ccwdev->dev), rc); QETH_CARD_TEXT_(card, 2, " err%d", rc); spin_lock_irqsave(&card->lock, flags); list_del_init(&reply->list); qeth_put_reply(reply); spin_unlock_irqrestore(&card->lock, flags); - qeth_release_buffer(iob->channel, iob); - atomic_set(&card->write.irq_pending, 0); + qeth_release_buffer(channel, iob); + atomic_set(&channel->irq_pending, 0); wake_up(&card->wait_q); return rc; } diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index efb84a75dd80..a86ba45ade05 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1239,25 +1239,26 @@ EXPORT_SYMBOL_GPL(qeth_l2_discipline); static int qeth_osn_send_control_data(struct qeth_card *card, int len, struct qeth_cmd_buffer *iob) { + struct qeth_channel *channel = iob->channel; unsigned long flags; int rc = 0; QETH_CARD_TEXT(card, 5, "osndctrd"); wait_event(card->wait_q, - atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0); + atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0); qeth_prepare_control_data(card, len, iob); QETH_CARD_TEXT(card, 6, "osnoirqp"); - spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags); - rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw, + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw, (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT); - spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags); + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); if (rc) { QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: " "ccw_device_start rc = %i\n", rc); QETH_CARD_TEXT_(card, 2, " err%d", rc); - qeth_release_buffer(iob->channel, iob); - atomic_set(&card->write.irq_pending, 0); + qeth_release_buffer(channel, iob); + atomic_set(&channel->irq_pending, 0); wake_up(&card->wait_q); } return rc; |