Multiple links and different number of devices per link should be
considered to iterate over links and devices. This patch implements
and uses link and device iterators - ata_port_for_each_link() and
ata_link_for_each_dev() - and ata_link_max_devices().
This change makes a lot of functions iterate over only possible
devices instead of from dev 0 to dev ATA_MAX_DEVICES. All such
changes have been examined and nothing should be broken.
While at it, add a separating comment before device helpers to
distinguish them better from link helpers and others.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/ata/ata_generic.c | 7 +-
drivers/ata/ata_piix.c | 9 ++-
drivers/ata/libata-core.c | 74 ++++++++++------------
drivers/ata/libata-eh.c | 142 ++++++++++++++++++++-----------------------
drivers/ata/libata-scsi.c | 26 +++-----
drivers/ata/pata_it821x.c | 7 +-
drivers/ata/pata_legacy.c | 5 +-
drivers/ata/pata_pdc2027x.c | 6 +-
drivers/ata/pata_rz1000.c | 5 +-
include/linux/libata.h | 14 +++-
10 files changed, 137 insertions(+), 158 deletions(-)
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index eac2c16..e060fee 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -74,21 +74,20 @@ static void generic_error_handler(struct
static void generic_set_mode(struct ata_port *ap)
{
int dma_enabled = 0;
- int i;
+ struct ata_device *dev;
/* Bits 5 and 6 indicate if DMA is active on master/slave */
if (ap->ioaddr.bmdma_addr)
dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev)) {
/* We don't really care */
dev->pio_mode = XFER_PIO_0;
dev->dma_mode = XFER_MW_DMA_0;
/* We do need the right mode information for DMA or PIO
and this comes from the current configuration flags */
- if (dma_enabled & (1 << (5 + i))) {
+ if (dma_enabled & (1 << (5 + dev->devno))) {
dev->xfer_mode = XFER_MW_DMA_0;
dev->xfer_shift = ATA_SHIFT_MWDMA;
dev->flags &= ~ATA_DFLAG_PIO;
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 245a671..ffeaf65 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -774,7 +774,8 @@ static unsigned int piix_sata_present_ma
static int piix_sata_softreset(struct ata_port *ap, unsigned int *classes)
{
unsigned int present_mask;
- int i, rc;
+ struct ata_device *dev;
+ int rc;
present_mask = piix_sata_present_mask(ap);
@@ -782,9 +783,9 @@ static int piix_sata_softreset(struct at
if (rc)
return rc;
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- if (!(present_mask & (1 << i)))
- classes[i] = ATA_DEV_NONE;
+ ata_link_for_each_dev(dev, &ap->link) {
+ if (!(present_mask & (1 << dev->devno)))
+ classes[dev->devno] = ATA_DEV_NONE;
}
return 0;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 68333d8..580317c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1361,13 +1361,12 @@ static void ata_dev_config_ncq(struct at
static void ata_set_port_max_cmd_len(struct ata_port *ap)
{
- int i;
-
if (ap->scsi_host) {
unsigned int len = 0;
+ struct ata_device *dev;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- len = max(len, ap->link.device[i].cdb_len);
+ ata_link_for_each_dev(dev, &ap->link)
+ len = max(len, dev->cdb_len);
ap->scsi_host->max_cmd_len = len;
}
@@ -1589,13 +1588,13 @@ int ata_bus_probe(struct ata_port *ap)
{
unsigned int classes[ATA_MAX_DEVICES];
int tries[ATA_MAX_DEVICES];
- int i, rc, down_xfermask;
+ int rc, down_xfermask;
struct ata_device *dev;
ata_port_probe(ap);
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- tries[i] = ATA_PROBE_MAX_TRIES;
+ ata_link_for_each_dev(dev, &ap->link)
+ tries[dev->devno] = ATA_PROBE_MAX_TRIES;
retry:
down_xfermask = 0;
@@ -1603,9 +1602,7 @@ int ata_bus_probe(struct ata_port *ap)
/* reset and determine device classes */
ap->ops->phy_reset(ap);
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
-
+ ata_link_for_each_dev(dev, &ap->link) {
if (!(ap->flags & ATA_FLAG_DISABLED) &&
dev->class != ATA_DEV_UNKNOWN)
classes[dev->devno] = dev->class;
@@ -1620,15 +1617,13 @@ int ata_bus_probe(struct ata_port *ap)
/* after the reset the device state is PIO 0 and the controller
state is undefined. Record the mode */
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ap->link.device[i].pio_mode = XFER_PIO_0;
+ ata_link_for_each_dev(dev, &ap->link)
+ dev->pio_mode = XFER_PIO_0;
/* read IDENTIFY page and configure devices */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
-
- if (tries[i])
- dev->class = classes[i];
+ ata_link_for_each_dev(dev, &ap->link) {
+ if (tries[dev->devno])
+ dev->class = classes[dev->devno];
if (!ata_dev_enabled(dev))
continue;
@@ -1649,9 +1644,10 @@ int ata_bus_probe(struct ata_port *ap)
goto fail;
}
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (ata_dev_enabled(&ap->link.device[i]))
+ ata_link_for_each_dev(dev, &ap->link) {
+ if (ata_dev_enabled(dev))
return 0;
+ }
/* no device present, disable port */
ata_port_disable(ap);
@@ -2198,16 +2194,17 @@ static int ata_dev_set_mode(struct ata_d
*/
int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
{
+ struct ata_link *link = &ap->link;
struct ata_device *dev;
- int i, rc = 0, used_dma = 0, found = 0;
+ int rc = 0, used_dma = 0, found = 0;
/* has private set_mode? */
if (ap->ops->set_mode) {
/* FIXME: make ->set_mode handle no device case and
* return error code and failing device on failure.
*/
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- if (ata_dev_ready(&ap->link.device[i])) {
+ ata_link_for_each_dev(dev, link) {
+ if (ata_dev_ready(dev)) {
ap->ops->set_mode(ap);
break;
}
@@ -2216,11 +2213,9 @@ int ata_set_mode(struct ata_port *ap, st
}
/* step 1: calculate xfer_mask */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ ata_link_for_each_dev(dev, link) {
unsigned int pio_mask, dma_mask;
- dev = &ap->link.device[i];
-
if (!ata_dev_enabled(dev))
continue;
@@ -2239,8 +2234,7 @@ int ata_set_mode(struct ata_port *ap, st
goto out;
/* step 2: always set host PIO timings */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, link) {
if (!ata_dev_enabled(dev))
continue;
@@ -2257,9 +2251,7 @@ int ata_set_mode(struct ata_port *ap, st
}
/* step 3: set host DMA timings */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
-
+ ata_link_for_each_dev(dev, link) {
if (!ata_dev_enabled(dev) || !dev->dma_mode)
continue;
@@ -2270,9 +2262,7 @@ int ata_set_mode(struct ata_port *ap, st
}
/* step 4: update devices' xfer mode */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
-
+ ata_link_for_each_dev(dev, link) {
/* don't udpate suspended devices' xfer mode */
if (!ata_dev_ready(dev))
continue;
@@ -5240,7 +5230,7 @@ static int ata_host_request_pm(struct at
*/
int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
{
- int i, j, rc;
+ int i, rc;
rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
if (rc)
@@ -5252,10 +5242,9 @@ int ata_host_suspend(struct ata_host *ho
*/
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
+ struct ata_device *dev;
- for (j = 0; j < ATA_MAX_DEVICES; j++) {
- struct ata_device *dev = &ap->link.device[j];
-
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_ready(dev)) {
ata_port_printk(ap, KERN_WARNING,
"suspend failed, device %d "
@@ -5448,7 +5437,7 @@ #endif
ap->link.ap = ap;
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ for (i = 0; i < ata_link_max_devices(&ap->link); i++) {
struct ata_device *dev = &ap->link.device[i];
dev->link = &ap->link;
dev->devno = i;
@@ -5700,7 +5689,8 @@ int ata_device_add(const struct ata_prob
/* kick EH for boot probing */
spin_lock_irqsave(ap->lock, flags);
- ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
+ ehi->probe_mask =
+ (1 << ata_link_max_devices(&ap->link)) - 1;
ehi->action |= ATA_EH_SOFTRESET;
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
@@ -5770,7 +5760,7 @@ err_out:
void ata_port_detach(struct ata_port *ap)
{
unsigned long flags;
- int i;
+ struct ata_device *dev;
if (!ap->ops->error_handler)
goto skip_eh;
@@ -5787,8 +5777,8 @@ void ata_port_detach(struct ata_port *ap
*/
spin_lock_irqsave(ap->lock, flags);
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ata_dev_disable(&ap->link.device[i]);
+ ata_link_for_each_dev(dev, &ap->link)
+ ata_dev_disable(dev);
spin_unlock_irqrestore(ap->lock, flags);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 46fca04..bfae7fa 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -109,23 +109,24 @@ static unsigned int ata_eh_dev_action(st
return ehc->i.action | ehc->i.dev_action[dev->devno];
}
-static void ata_eh_clear_action(struct ata_device *dev,
+static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev,
struct ata_eh_info *ehi, unsigned int action)
{
- int i;
+ struct ata_device *tdev;
if (!dev) {
ehi->action &= ~action;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ehi->dev_action[i] &= ~action;
+ ata_link_for_each_dev(tdev, link)
+ ehi->dev_action[tdev->devno] &= ~action;
} else {
/* doesn't make sense for port-wide EH actions */
WARN_ON(!(action & ATA_EH_PERDEV_MASK));
/* break ehi->action into ehi->dev_action */
if (ehi->action & action) {
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ehi->dev_action[i] |= ehi->action & action;
+ ata_link_for_each_dev(tdev, link)
+ ehi->dev_action[tdev->devno] |=
+ ehi->action & action;
ehi->action &= ~action;
}
@@ -741,7 +742,8 @@ void ata_eh_qc_retry(struct ata_queued_c
*/
static void ata_eh_detach_dev(struct ata_device *dev)
{
- struct ata_port *ap = dev->link->ap;
+ struct ata_link *link = dev->link;
+ struct ata_port *ap = link->ap;
unsigned long flags;
ata_dev_disable(dev);
@@ -756,8 +758,8 @@ static void ata_eh_detach_dev(struct ata
}
/* clear per-dev EH actions */
- ata_eh_clear_action(dev, &dev->link->eh_info, ATA_EH_PERDEV_MASK);
- ata_eh_clear_action(dev, &dev->link->eh_context.i, ATA_EH_PERDEV_MASK);
+ ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK);
+ ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK);
spin_unlock_irqrestore(ap->lock, flags);
}
@@ -797,7 +799,7 @@ static void ata_eh_about_to_do(struct at
ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
}
- ata_eh_clear_action(dev, ehi, action);
+ ata_eh_clear_action(&ap->link, dev, ehi, action);
if (!(ehc->i.flags & ATA_EHI_QUIET))
ap->pflags |= ATA_PFLAG_RECOVERED;
@@ -828,7 +830,7 @@ static void ata_eh_done(struct ata_port
ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
}
- ata_eh_clear_action(dev, &ehc->i, action);
+ ata_eh_clear_action(&ap->link, dev, &ehc->i, action);
}
/**
@@ -1469,10 +1471,11 @@ static void ata_eh_report(struct ata_por
static int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
unsigned int *classes)
{
- int i, rc;
+ struct ata_device *dev;
+ int rc;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- classes[i] = ATA_DEV_UNKNOWN;
+ ata_link_for_each_dev(dev, &ap->link)
+ classes[dev->devno] = ATA_DEV_UNKNOWN;
rc = reset(ap, classes);
if (rc)
@@ -1482,14 +1485,16 @@ static int ata_do_reset(struct ata_port
* is complete and convert all ATA_DEV_UNKNOWN to
* ATA_DEV_NONE.
*/
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (classes[i] != ATA_DEV_UNKNOWN)
+ ata_link_for_each_dev(dev, &ap->link)
+ if (classes[dev->devno] != ATA_DEV_UNKNOWN)
break;
- if (i < ATA_MAX_DEVICES)
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (classes[i] == ATA_DEV_UNKNOWN)
- classes[i] = ATA_DEV_NONE;
+ if (dev) {
+ ata_link_for_each_dev(dev, &ap->link) {
+ if (classes[dev->devno] == ATA_DEV_UNKNOWN)
+ classes[dev->devno] = ATA_DEV_NONE;
+ }
+ }
return 0;
}
@@ -1514,9 +1519,10 @@ static int ata_eh_reset(struct ata_port
unsigned int *classes = ehc->classes;
int tries = ATA_EH_RESET_TRIES;
int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
+ struct ata_device *dev;
unsigned int action;
ata_reset_fn_t reset;
- int i, did_followup_srst, rc;
+ int did_followup_srst, rc;
/* about to reset */
ata_eh_about_to_do(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
@@ -1552,8 +1558,8 @@ static int ata_eh_reset(struct ata_port
reset = softreset;
else {
/* prereset told us not to reset, bang classes and return */
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- classes[i] = ATA_DEV_NONE;
+ ata_link_for_each_dev(dev, &ap->link)
+ classes[dev->devno] = ATA_DEV_NONE;
return 0;
}
@@ -1629,8 +1635,8 @@ static int ata_eh_reset(struct ata_port
/* After the reset, the device state is PIO 0 and the
* controller state is undefined. Record the mode.
*/
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ap->link.device[i].pio_mode = XFER_PIO_0;
+ ata_link_for_each_dev(dev, &ap->link)
+ dev->pio_mode = XFER_PIO_0;
if (postreset)
postreset(ap, classes);
@@ -1649,15 +1655,12 @@ static int ata_eh_revalidate_and_attach(
struct ata_eh_context *ehc = &ap->link.eh_context;
struct ata_device *dev;
unsigned long flags;
- int i, rc = 0;
+ int rc = 0;
DPRINTK("ENTER\n");
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- unsigned int action;
-
- dev = &ap->link.device[i];
- action = ata_eh_dev_action(dev);
+ ata_link_for_each_dev(dev, &ap->link) {
+ unsigned int action = ata_eh_dev_action(dev);
if (action & ATA_EH_REVALIDATE && ata_dev_ready(dev)) {
if (ata_port_offline(ap)) {
@@ -1721,16 +1724,14 @@ static int ata_eh_revalidate_and_attach(
static int ata_eh_suspend(struct ata_port *ap, struct ata_device **r_failed_dev)
{
struct ata_device *dev;
- int i, rc = 0;
+ int rc = 0;
DPRINTK("ENTER\n");
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ ata_link_for_each_dev(dev, &ap->link) {
+ unsigned int action = ata_eh_dev_action(dev);
+ unsigned int err_mask;
unsigned long flags;
- unsigned int action, err_mask;
-
- dev = &ap->link.device[i];
- action = ata_eh_dev_action(dev);
if (!ata_dev_enabled(dev) || !(action & ATA_EH_SUSPEND))
continue;
@@ -1785,15 +1786,11 @@ static void ata_eh_prep_resume(struct at
{
struct ata_device *dev;
unsigned long flags;
- int i;
DPRINTK("ENTER\n");
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- unsigned int action;
-
- dev = &ap->link.device[i];
- action = ata_eh_dev_action(dev);
+ ata_link_for_each_dev(dev, &ap->link) {
+ unsigned int action = ata_eh_dev_action(dev);
if (!ata_dev_enabled(dev) || !(action & ATA_EH_RESUME))
continue;
@@ -1823,15 +1820,13 @@ static void ata_eh_prep_resume(struct at
static int ata_eh_resume(struct ata_port *ap, struct ata_device **r_failed_dev)
{
struct ata_device *dev;
- int i, rc = 0;
+ int rc = 0;
DPRINTK("ENTER\n");
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- unsigned int action, err_mask;
-
- dev = &ap->link.device[i];
- action = ata_eh_dev_action(dev);
+ ata_link_for_each_dev(dev, &ap->link) {
+ unsigned int action = ata_eh_dev_action(dev);
+ unsigned int err_mask;
if (!ata_dev_enabled(dev) || !(action & ATA_EH_RESUME))
continue;
@@ -1862,20 +1857,22 @@ static int ata_eh_resume(struct ata_port
static int ata_port_nr_enabled(struct ata_port *ap)
{
- int i, cnt = 0;
+ struct ata_device *dev;
+ int cnt = 0;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (ata_dev_enabled(&ap->link.device[i]))
+ ata_link_for_each_dev(dev, &ap->link)
+ if (ata_dev_enabled(dev))
cnt++;
return cnt;
}
static int ata_port_nr_vacant(struct ata_port *ap)
{
- int i, cnt = 0;
+ struct ata_device *dev;
+ int cnt = 0;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (ap->link.device[i].class == ATA_DEV_UNKNOWN)
+ ata_link_for_each_dev(dev, &ap->link)
+ if (dev->class == ATA_DEV_UNKNOWN)
cnt++;
return cnt;
}
@@ -1883,17 +1880,15 @@ static int ata_port_nr_vacant(struct ata
static int ata_eh_skip_recovery(struct ata_port *ap)
{
struct ata_eh_context *ehc = &ap->link.eh_context;
- int i;
+ struct ata_device *dev;
/* skip if all possible devices are suspended */
- for (i = 0; i < ata_port_max_devices(ap); i++) {
- struct ata_device *dev = &ap->link.device[i];
-
+ ata_link_for_each_dev(dev, &ap->link) {
if (!(dev->flags & ATA_DFLAG_SUSPENDED))
break;
}
- if (i == ata_port_max_devices(ap))
+ if (dev == NULL)
return 1;
/* thaw frozen port, resume link and recover failed devices */
@@ -1902,9 +1897,7 @@ static int ata_eh_skip_recovery(struct a
return 0;
/* skip if class codes for all vacant slots are ATA_DEV_NONE */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
-
+ ata_link_for_each_dev(dev, &ap->link) {
if (dev->class == ATA_DEV_UNKNOWN &&
ehc->classes[dev->devno] != ATA_DEV_NONE)
return 0;
@@ -1989,14 +1982,12 @@ static int ata_eh_recover(struct ata_por
{
struct ata_eh_context *ehc = &ap->link.eh_context;
struct ata_device *dev;
- int down_xfermask, i, rc;
+ int down_xfermask, rc;
DPRINTK("ENTER\n");
/* prep for recovery */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
-
+ ata_link_for_each_dev(dev, &ap->link) {
ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
/* process hotplug request */
@@ -2028,8 +2019,8 @@ static int ata_eh_recover(struct ata_por
if (ata_eh_skip_recovery(ap))
ehc->i.action = 0;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ehc->classes[i] = ATA_DEV_UNKNOWN;
+ ata_link_for_each_dev(dev, &ap->link)
+ ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
/* reset */
if (ehc->i.action & ATA_EH_RESET_MASK) {
@@ -2091,8 +2082,8 @@ static int ata_eh_recover(struct ata_por
/* recovery failed, activate hp-poll */
ata_hp_poll_activate(ap);
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ata_dev_disable(&ap->link.device[i]);
+ ata_link_for_each_dev(dev, &ap->link);
+ ata_dev_disable(dev);
}
DPRINTK("EXIT, rc=%d\n", rc);
@@ -2235,7 +2226,7 @@ static void ata_eh_handle_port_resume(st
{
unsigned long timeout;
unsigned long flags;
- int i, rc = 0;
+ int rc = 0;
/* are we resuming? */
spin_lock_irqsave(ap->lock, flags);
@@ -2256,8 +2247,9 @@ static void ata_eh_handle_port_resume(st
/* give devices time to request EH */
timeout = jiffies + HZ; /* 1s max */
while (1) {
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ struct ata_device *dev;
+
+ ata_link_for_each_dev(dev, &ap->link) {
unsigned int action = ata_eh_dev_action(dev);
if ((dev->flags & ATA_DFLAG_SUSPENDED) &&
@@ -2265,7 +2257,7 @@ static void ata_eh_handle_port_resume(st
break;
}
- if (i == ATA_MAX_DEVICES || time_after(jiffies, timeout))
+ if (dev == NULL || time_after(jiffies, timeout))
break;
msleep(10);
}
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a8d988e..771097d 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -543,7 +543,7 @@ int ata_scsi_device_resume(struct scsi_d
/* We don't want autopsy and verbose EH messages. Disable
* those if we're the only device on this link.
*/
- if (ata_port_max_devices(ap) == 1)
+ if (ata_link_max_devices(dev->link) == 1)
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
ata_port_schedule_eh(ap);
@@ -2521,7 +2521,7 @@ static unsigned int atapi_xlat(struct at
static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
{
- if (likely(id < ATA_MAX_DEVICES))
+ if (likely(id < ata_link_max_devices(&ap->link)))
return &ap->link.device[id];
return NULL;
}
@@ -2975,19 +2975,18 @@ void ata_scsi_simulate(struct ata_device
void ata_scsi_scan_host(struct ata_port *ap)
{
- unsigned int i;
+ struct ata_device *dev;
if (ap->flags & ATA_FLAG_DISABLED)
return;
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
struct scsi_device *sdev;
if (!ata_dev_enabled(dev) || dev->sdev)
continue;
- sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
+ sdev = __scsi_add_device(ap->scsi_host, 0, dev->devno, 0, NULL);
if (!IS_ERR(sdev)) {
dev->sdev = sdev;
scsi_device_put(sdev);
@@ -3093,7 +3092,7 @@ static void ata_scsi_remove_dev(struct a
void ata_scsi_hotplug(void *data)
{
struct ata_port *ap = data;
- int i;
+ struct ata_device *dev;
if (ap->pflags & ATA_PFLAG_UNLOADING) {
DPRINTK("ENTER/EXIT - unloading\n");
@@ -3103,8 +3102,7 @@ void ata_scsi_hotplug(void *data)
DPRINTK("ENTER\n");
/* unplug detached devices */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
unsigned long flags;
if (!(dev->flags & ATA_DFLAG_DETACHED))
@@ -3124,8 +3122,7 @@ void ata_scsi_hotplug(void *data)
* failed silently. Requeue if there are enabled but
* unattached devices.
*/
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev) && !dev->sdev) {
queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
break;
@@ -3169,7 +3166,7 @@ static int ata_scsi_user_scan(struct Scs
spin_lock_irqsave(ap->lock, flags);
if (id == SCAN_WILD_CARD) {
- ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
+ ehi->probe_mask |= (1 << ata_link_max_devices(&ap->link)) - 1;
ehi->action |= ATA_EH_SOFTRESET;
} else {
struct ata_device *dev = ata_find_dev(ap, id);
@@ -3206,11 +3203,8 @@ void ata_scsi_dev_rescan(void *data)
{
struct ata_port *ap = data;
struct ata_device *dev;
- unsigned int i;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev) && dev->sdev)
scsi_rescan_device(&(dev->sdev->sdev_gendev));
}
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index d883906..98fcd8a 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -486,22 +486,21 @@ static unsigned int it821x_passthru_qc_i
static void it821x_smart_set_mode(struct ata_port *ap)
{
int dma_enabled = 0;
- int i;
+ struct ata_device *dev;
/* Bits 5 and 6 indicate if DMA is active on master/slave */
/* It is possible that BMDMA isn't allocated */
if (ap->ioaddr.bmdma_addr)
dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev)) {
/* We don't really care */
dev->pio_mode = XFER_PIO_0;
dev->dma_mode = XFER_MW_DMA_0;
/* We do need the right mode information for DMA or PIO
and this comes from the current configuration flags */
- if (dma_enabled & (1 << (5 + i))) {
+ if (dma_enabled & (1 << (5 + dev->devno))) {
dev->xfer_mode = XFER_MW_DMA_0;
dev->xfer_shift = ATA_SHIFT_MWDMA;
dev->flags &= ~ATA_DFLAG_PIO;
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 10231ef..613c915 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -107,10 +107,9 @@ static int pio_mask = 0x1F; /* PIO rang
static void legacy_set_mode(struct ata_port *ap)
{
- int i;
+ struct ata_device *dev;
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev)) {
dev->pio_mode = XFER_PIO_0;
dev->xfer_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 09c01ca..6d60dbe 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -453,11 +453,9 @@ static void pdc2027x_set_dmamode(struct
*/
static void pdc2027x_post_set_mode(struct ata_port *ap)
{
- int i;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ struct ata_device *dev;
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev)) {
pdc2027x_set_piomode(ap, dev);
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index b59fafd..c231631 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -60,10 +60,9 @@ static void rz1000_error_handler(struct
static void rz1000_set_mode(struct ata_port *ap)
{
- int i;
+ struct ata_device *dev;
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->link.device[i];
+ ata_link_for_each_dev(dev, &ap->link) {
if (ata_dev_enabled(dev)) {
/* We don't really care */
dev->pio_mode = XFER_PIO_0;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index fb6d334..48503d4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1032,15 +1032,23 @@ static inline unsigned int ata_dev_ready
}
/*
- * port helpers
+ * link helpers
*/
-static inline int ata_port_max_devices(const struct ata_port *ap)
+static inline int ata_link_max_devices(const struct ata_link *link)
{
- if (ap->flags & ATA_FLAG_SLAVE_POSS)
+ if (link->ap->flags & ATA_FLAG_SLAVE_POSS)
return 2;
return 1;
}
+#define ata_port_for_each_link(lk, ap) \
+ for ((lk) = &(ap)->link; (lk); (lk) = NULL)
+
+#define ata_link_for_each_dev(dev, link) \
+ for ((dev) = (link)->device; \
+ (dev) - (link)->device < ata_link_max_devices(link) || (dev = NULL); \
+ (dev)++)
+
static inline u8 ata_chk_status(struct ata_port *ap)
{
--
1.4.2.3
-
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