Commit b9a8a271 authored Jul 27, 2015 by Andy Shevchenko Committed by Lee Jones Jul 28, 2015

mfd: make mfd_remove_devices() iterate in reverse order

The newly introduced device_for_each_child_reverse() would be used when MFD
core removes the device.

After this patch applied the devices will be removed in a reversed order. This
behaviour is useful when devices have implicit dependency on order, i.e.
consider MFD device with serial bus controller, such as SPI, and DMA IP that is
attached to serial bus controller: before remove the DMA driver we have to be
ensured that no DMA transfers is ongoing and the requested channel are unused.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

parent 3d060aeb

drivers/mfd/mfd-core.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -302,7 +302,7 @@ void mfd_remove_devices(struct device *parent)
	{		{
	atomic_t *cnts = NULL;		atomic_t *cnts = NULL;

	device_for_each_child(parent, &cnts, mfd_remove_devices_fn);		device_for_each_child_reverse(parent, &cnts, mfd_remove_devices_fn);
	kfree(cnts);		kfree(cnts);
	}		}
	EXPORT_SYMBOL(mfd_remove_devices);		EXPORT_SYMBOL(mfd_remove_devices);

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