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Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata

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Pull another libata patch from Tejun Heo:
 "One more patch from Adam added.

  It makes libata skip probing for NCQ prio unless the feature is
  explicitly requested by the user. This is necessary because some
  controllers lock up after the optional feature is probed"

* 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: avoid probing NCQ Prio Support if not explicitly requested
This commit is contained in:
Linus Torvalds
2016-12-13 15:30:50 -08:00
parent b92e09bb5b 9f56eca3ae
commit 7b882cb800
2 changed files with 31 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/ata/libata-scsi.c
View File

@@ -272,7 +272,8 @@ DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
static ssize_t ata_ncq_prio_enable_show(struct device *device,
struct device_attribute *attr, char *buf)
struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(device);
struct ata_port *ap;
@@ -305,7 +306,6 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device,
struct ata_port *ap;
struct ata_device *dev;
long int input;
unsigned long flags;
int rc;
rc = kstrtol(buf, 10, &input);
@@ -315,28 +315,32 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device,
return -EINVAL;
ap = ata_shost_to_port(sdev->host);
spin_lock_irqsave(ap->lock, flags);
dev = ata_scsi_find_dev(ap, sdev);
if (unlikely(!dev)) {
rc = -ENODEV;
goto unlock;
}
if (unlikely(!dev))
return -ENODEV;
spin_lock_irq(ap->lock);
if (input)
dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
else
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
dev->link->eh_info.action |= ATA_EH_REVALIDATE;
dev->link->eh_info.flags |= ATA_EHI_QUIET;
ata_port_schedule_eh(ap);
spin_unlock_irq(ap->lock);
ata_port_wait_eh(ap);
if (input) {
spin_lock_irq(ap->lock);
if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
rc = -EOPNOTSUPP;
goto unlock;
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
rc = -EIO;
}
dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
} else {
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
spin_unlock_irq(ap->lock);
}
unlock:
spin_unlock_irqrestore(ap->lock, flags);
return rc ? rc : len;
}