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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2009-03-04 14:44:00 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-25 02:38:26 +0300 |
| commit | ffa6a7054d172a2f57248dff2de600ca795c5656 (patch) | |
| tree | f93c6234bb90295c52fcef09e367ed77ff6c3645 /drivers/base/core.c | |
| parent | 60530afe1ee8a5532cb09d0ab5bc3f1a6495b780 (diff) | |
| download | linux-ffa6a7054d172a2f57248dff2de600ca795c5656.tar.xz | |
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/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 95c67ffd71da..e73c92d13a23 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1561,8 +1561,10 @@ out: * device_move - moves a device to a new parent * @dev: the pointer to the struct device to be moved * @new_parent: the new parent of the device (can by NULL) + * @dpm_order: how to reorder the dpm_list */ -int device_move(struct device *dev, struct device *new_parent) +int device_move(struct device *dev, struct device *new_parent, + enum dpm_order dpm_order) { int error; struct device *old_parent; @@ -1572,6 +1574,7 @@ int device_move(struct device *dev, struct device *new_parent) if (!dev) return -EINVAL; + device_pm_lock(); new_parent = get_device(new_parent); new_parent_kobj = get_device_parent(dev, new_parent); @@ -1613,9 +1616,23 @@ int device_move(struct device *dev, struct device *new_parent) put_device(new_parent); goto out; } + switch (dpm_order) { + case DPM_ORDER_NONE: + break; + case DPM_ORDER_DEV_AFTER_PARENT: + device_pm_move_after(dev, new_parent); + break; + case DPM_ORDER_PARENT_BEFORE_DEV: + device_pm_move_before(new_parent, dev); + break; + case DPM_ORDER_DEV_LAST: + device_pm_move_last(dev); + break; + } out_put: put_device(old_parent); out: + device_pm_unlock(); put_device(dev); return error; } |