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s390/qeth: reduce hard-coded access to ccw channels

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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>
This commit is contained in:
Julian Wiedmann 2018-08-09 14:47:59 +02:00 committed by David S. Miller
parent 73657a3e5b
commit 750b162598
2 changed files with 31 additions and 28 deletions
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46
drivers/s390/net/qeth_core_main.c
View File

@ -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;
}

13
drivers/s390/net/qeth_l2_main.c
View File

@ -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;