On 20/07/2023 01:42, Niklas Cassel wrote:
From: Niklas Cassel <niklas.cassel@xxxxxxx>
Remove ata_bus_probe() as it is unused.
Is there still a reference to this in Documentation? There seems to be.
Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx>
---
drivers/ata/libata-core.c | 138 --------------------------------------
drivers/ata/libata.h | 1 -
2 files changed, 139 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index dedae669c9da..0af88ef231d1 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3057,144 +3057,6 @@ int ata_cable_sata(struct ata_port *ap)
}
EXPORT_SYMBOL_GPL(ata_cable_sata);
-/**
- * ata_bus_probe - Reset and probe ATA bus
- * @ap: Bus to probe
- *
- * Master ATA bus probing function. Initiates a hardware-dependent
- * bus reset, then attempts to identify any devices found on
- * the bus.
- *
- * LOCKING:
- * PCI/etc. bus probe sem.
- *
- * RETURNS:
- * Zero on success, negative errno otherwise.
- */
-
-int ata_bus_probe(struct ata_port *ap)
-{
- unsigned int classes[ATA_MAX_DEVICES];
- int tries[ATA_MAX_DEVICES];
- int rc;
- struct ata_device *dev;
-
- ata_for_each_dev(dev, &ap->link, ALL)
- tries[dev->devno] = ATA_PROBE_MAX_TRIES;
ATA_PROBE_MAX_TRIES is no longer referenced, AFAICS
-
- retry:
- ata_for_each_dev(dev, &ap->link, ALL) {
- /* If we issue an SRST then an ATA drive (not ATAPI)
- * may change configuration and be in PIO0 timing. If
- * we do a hard reset (or are coming from power on)
- * this is true for ATA or ATAPI. Until we've set a
- * suitable controller mode we should not touch the
- * bus as we may be talking too fast.
- */
- dev->pio_mode = XFER_PIO_0;
- dev->dma_mode = 0xff;
-
- /* If the controller has a pio mode setup function
- * then use it to set the chipset to rights. Don't
- * touch the DMA setup as that will be dealt with when
- * configuring devices.
- */
- if (ap->ops->set_piomode)
- ap->ops->set_piomode(ap, dev);
- }
-
- /* reset and determine device classes */
- ap->ops->phy_reset(ap);
Does .phy_reset still have a user? If not, maybe all referenced symbols
removed here can be checked for remaining references.
-
- ata_for_each_dev(dev, &ap->link, ALL) {
- if (dev->class != ATA_DEV_UNKNOWN)
- classes[dev->devno] = dev->class;
- else
- classes[dev->devno] = ATA_DEV_NONE;
-
- dev->class = ATA_DEV_UNKNOWN;
- }
-
- /* read IDENTIFY page and configure devices. We have to do the identify
- specific sequence bass-ackwards so that PDIAG- is released by
- the slave device */
-
- ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
- if (tries[dev->devno])
- dev->class = classes[dev->devno];
-
- if (!ata_dev_enabled(dev))
- continue;
-
- rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
- dev->id);
- if (rc)
- goto fail;
- }
-
- /* Now ask for the cable type as PDIAG- should have been released */
- if (ap->ops->cable_detect)
- ap->cbl = ap->ops->cable_detect(ap);
-
- /* We may have SATA bridge glue hiding here irrespective of
- * the reported cable types and sensed types. When SATA
- * drives indicate we have a bridge, we don't know which end
- * of the link the bridge is which is a problem.
- */
- ata_for_each_dev(dev, &ap->link, ENABLED)
- if (ata_id_is_sata(dev->id))
- ap->cbl = ATA_CBL_SATA;
-
- /* After the identify sequence we can now set up the devices. We do
- this in the normal order so that the user doesn't get confused */
-
- ata_for_each_dev(dev, &ap->link, ENABLED) {
- ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
- rc = ata_dev_configure(dev);
- ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
- if (rc)
- goto fail;
- }
-
- /* configure transfer mode */
- rc = ata_set_mode(&ap->link, &dev);
- if (rc)
- goto fail;
-
- ata_for_each_dev(dev, &ap->link, ENABLED)
- return 0;
-
- return -ENODEV;
-
- fail:
- tries[dev->devno]--;
-
- switch (rc) {
- case -EINVAL:
- /* eeek, something went very wrong, give up */
- tries[dev->devno] = 0;
- break;
-
- case -ENODEV:
- /* give it just one more chance */
- tries[dev->devno] = min(tries[dev->devno], 1);
- fallthrough;
- case -EIO:
- if (tries[dev->devno] == 1) {
- /* This is the last chance, better to slow
- * down than lose it.
- */
- sata_down_spd_limit(&ap->link, 0);
- ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
- }
- }
-
- if (!tries[dev->devno])
- ata_dev_disable(dev);
-
- goto retry;
-}
-
/**
* sata_print_link_status - Print SATA link status
* @link: SATA link to printk link status about
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 1ec9b4427b84..6e7d352803bd 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -122,7 +122,6 @@ extern void ata_scsi_media_change_notify(struct ata_device *dev);
extern void ata_scsi_hotplug(struct work_struct *work);
extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
extern void ata_scsi_dev_rescan(struct work_struct *work);
-extern int ata_bus_probe(struct ata_port *ap);
extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
unsigned int id, u64 lun);
void ata_scsi_sdev_config(struct scsi_device *sdev);
