From 9b847548663ef1039dd49f0eb4463d001e596bc3 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 6 Jan 2006 09:28:07 +0100 Subject: [PATCH] Suspend support for libata 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/scsi/scsi_sysfs.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'drivers/scsi/scsi_sysfs.c') diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 15842b1f0f4a..ea7f3a433572 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -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) -- cgit v1.2.3