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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2009-03-04 12:44:00 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-24 16:38:26 -0700 |
| commit | ffa6a7054d172a2f57248dff2de600ca795c5656 (patch) | |
| tree | f93c6234bb90295c52fcef09e367ed77ff6c3645 /drivers/s390/cio/device.c | |
| parent | 60530afe1ee8a5532cb09d0ab5bc3f1a6495b780 (diff) | |
| download | op-kernel-dev-ffa6a7054d172a2f57248dff2de600ca795c5656.zip op-kernel-dev-ffa6a7054d172a2f57248dff2de600ca795c5656.tar.gz | |
Driver core: Fix device_move() vs. dpm list ordering, v2
dpm_list currently relies on the fact that child devices will
be registered after their parents to get a correct suspend
order. Using device_move() however destroys this assumption, as
an already registered device may be moved under a newly registered
one.
This patch adds a new argument to device_move(), allowing callers
to specify how dpm_list should be adapted.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/s390/cio/device.c')
| -rw-r--r-- | drivers/s390/cio/device.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 611d2e0..e28f8ae 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -799,7 +799,7 @@ static void sch_attach_disconnected_device(struct subchannel *sch, return; other_sch = to_subchannel(cdev->dev.parent); /* Note: device_move() changes cdev->dev.parent */ - ret = device_move(&cdev->dev, &sch->dev); + ret = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV); if (ret) { CIO_MSG_EVENT(0, "Moving disconnected device 0.%x.%04x failed " "(ret=%d)!\n", cdev->private->dev_id.ssid, @@ -830,7 +830,7 @@ static void sch_attach_orphaned_device(struct subchannel *sch, * Try to move the ccw device to its new subchannel. * Note: device_move() changes cdev->dev.parent */ - ret = device_move(&cdev->dev, &sch->dev); + ret = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV); if (ret) { CIO_MSG_EVENT(0, "Moving device 0.%x.%04x from orphanage " "failed (ret=%d)!\n", @@ -897,7 +897,8 @@ void ccw_device_move_to_orphanage(struct work_struct *work) * ccw device can take its place on the subchannel. * Note: device_move() changes cdev->dev.parent */ - ret = device_move(&cdev->dev, &css->pseudo_subchannel->dev); + ret = device_move(&cdev->dev, &css->pseudo_subchannel->dev, + DPM_ORDER_NONE); if (ret) { CIO_MSG_EVENT(0, "Moving device 0.%x.%04x to orphanage failed " "(ret=%d)!\n", cdev->private->dev_id.ssid, @@ -1129,7 +1130,7 @@ static void ccw_device_move_to_sch(struct work_struct *work) * Try to move the ccw device to its new subchannel. * Note: device_move() changes cdev->dev.parent */ - rc = device_move(&cdev->dev, &sch->dev); + rc = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV); mutex_unlock(&sch->reg_mutex); if (rc) { CIO_MSG_EVENT(0, "Moving device 0.%x.%04x to subchannel " |
