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

[PATCH] Suspend support for libata

Browse Source 
This patch adds suspend patch to libata, and ata_piix in particular. For
most low level drivers, they should just need to add the 4 hooks to
work. As I can only test ata_piix, I didn't enable it for more
though.

Suspend support is the single most important feature on a notebook, and
most new notebooks have sata drives. It's quite embarrassing that we
_still_ do not support this. Right now, it's perfectly possible to
suspend the drive in mid-transfer.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jens Axboe
2006-01-06 09:28:07 +01:00
committed by Linus Torvalds
parent 88202a0c84
commit 9b84754866
7 changed files with 181 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/scsi/scsi_sysfs.c
View File

@ -263,9 +263,40 @@ static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
}
static int scsi_bus_suspend(struct device * dev, pm_message_t state)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_host_template *sht = sdev->host->hostt;
int err;
err = scsi_device_quiesce(sdev);
if (err)
return err;
if (sht->suspend)
err = sht->suspend(sdev);
return err;
}
static int scsi_bus_resume(struct device * dev)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct scsi_host_template *sht = sdev->host->hostt;
int err = 0;
if (sht->resume)
err = sht->resume(sdev);
scsi_device_resume(sdev);
return err;
}
struct bus_type scsi_bus_type = {
.name = "scsi",
.match = scsi_bus_match,
.suspend = scsi_bus_suspend,
.resume = scsi_bus_resume,
};
int scsi_sysfs_register(void)