lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

libata: implement ATA_DFLAG_DUBIOUS_XFER

Browse Source 
ATA_DFLAG_DUBIOUS_XFER is set whenever data transfer speed or method
changes and gets cleared when data transfer command succeeds in the
newly configured transfer mode.

This will be used to improve speed down logic.

Signed-off-by: Tejun Heo <htejun@gmail.com<
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-11-27 19:28:58 +09:00
committed by Jeff Garzik
parent 663f99b86a
commit 00115e0f5b
3 changed files with 53 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/ata/libata-eh.c
View File

@@ -456,9 +456,20 @@ void ata_scsi_error(struct Scsi_Host *host)
spin_lock_irqsave(ap->lock, flags);
__ata_port_for_each_link(link, ap) {
struct ata_eh_context *ehc = &link->eh_context;
struct ata_device *dev;
memset(&link->eh_context, 0, sizeof(link->eh_context));
link->eh_context.i = link->eh_info;
memset(&link->eh_info, 0, sizeof(link->eh_info));
ata_link_for_each_dev(dev, link) {
int devno = dev->devno;
ehc->saved_xfer_mode[devno] = dev->xfer_mode;
if (ata_ncq_enabled(dev))
ehc->saved_ncq_enabled |= 1 << devno;
}
}
ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
@@ -2376,11 +2387,27 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
{
struct ata_port *ap = link->ap;
struct ata_device *dev;
int rc;
/* has private set_mode? */
if (ap->ops->set_mode)
return ap->ops->set_mode(link, r_failed_dev);
return ata_do_set_mode(link, r_failed_dev);
rc = ap->ops->set_mode(link, r_failed_dev);
else
rc = ata_do_set_mode(link, r_failed_dev);
/* if transfer mode has changed, set DUBIOUS_XFER on device */
ata_link_for_each_dev(dev, link) {
struct ata_eh_context *ehc = &link->eh_context;
u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno];
u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno));
if (dev->xfer_mode != saved_xfer_mode ||
ata_ncq_enabled(dev) != saved_ncq)
dev->flags |= ATA_DFLAG_DUBIOUS_XFER;
}
return rc;
}
static int ata_link_nr_enabled(struct ata_link *link)
@@ -2441,6 +2468,8 @@ static int ata_eh_schedule_probe(struct ata_device *dev)
ata_dev_init(dev);
ehc->did_probe_mask |= (1 << dev->devno);
ehc->i.action |= ATA_EH_SOFTRESET;
ehc->saved_xfer_mode[dev->devno] = 0;
ehc->saved_ncq_enabled &= ~(1 << dev->devno);
return 1;
}