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dm: core: Avoid partially removing devices

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At present if device_remove() decides that the device should not actually
be removed, it still calls the uclass pre_remove() method and powers the
device down.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-01-24 14:32:45 -07:00
parent b1f25fcfef
commit c51d2e704a
3 changed files with 52 additions and 22 deletions
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9
include/dm/device-internal.h
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@ -123,7 +123,8 @@ int device_probe(struct udevice *dev);
*
* @dev: Pointer to device to remove
* @flags: Flags for selective device removal (DM_REMOVE_...)
* @return 0 if OK, -ve on error (an error here is normally a very bad thing)
* @return 0 if OK, -EKEYREJECTED if not removed due to flags, other -ve on
* error (such an error here is normally a very bad thing)
*/
#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
int device_remove(struct udevice *dev, uint flags);
@ -173,6 +174,12 @@ static inline int device_chld_unbind(struct udevice *dev, struct driver *drv)
/**
* device_chld_remove() - Stop all device's children
*
* This continues through all children recursively stopping part-way through if
* an error occurs. Return values of -EKEYREJECTED are ignored and processing
* continues, since they just indicate that the child did not elect to be
* removed based on the value of @flags.
*
* @dev: The device whose children are to be removed
* @drv: The targeted driver
* @flags: Flag, if this functions is called in the pre-OS stage