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Commit 3efe41be authored by Brian Norris's avatar Brian Norris
Browse files

mtd: implement common reboot notifier boilerplate 



cfi_cmdset_000{1,2}.c already implement their own reboot notifiers, and
we're going to add one for NAND. Let's put the boilerplate in one place.

Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
Tested-by: default avatarScott Branden <sbranden@broadcom.com>
parent 362376a7

drivers/mtd/mtdcore.c

+20 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 
#include <linux/backing-dev.h>

#include <linux/gfp.h>

#include <linux/slab.h>

#include <linux/reboot.h>



#include <linux/mtd/mtd.h>

#include <linux/mtd/partitions.h>
@@ -365,6 +366,17 @@ static struct device_type mtd_devtype = { 
	.release	= mtd_release,

};



static int mtd_reboot_notifier(struct notifier_block *n, unsigned long state,

			       void *cmd)

{

	struct mtd_info *mtd;



	mtd = container_of(n, struct mtd_info, reboot_notifier);

	mtd->_reboot(mtd);



	return NOTIFY_DONE;

}



/**

 *	add_mtd_device - register an MTD device

 *	@mtd: pointer to new MTD device info structure
@@ -565,6 +577,11 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types, 
			err = -ENODEV;

	}



	if (mtd->_reboot) {

		mtd->reboot_notifier.notifier_call = mtd_reboot_notifier;

		register_reboot_notifier(&mtd->reboot_notifier);

	}



	return err;

}

EXPORT_SYMBOL_GPL(mtd_device_parse_register);
@@ -579,6 +596,9 @@ int mtd_device_unregister(struct mtd_info *master) 
{

	int err;



	if (master->_reboot)

		unregister_reboot_notifier(&master->reboot_notifier);



	err = del_mtd_partitions(master);

	if (err)

		return err;

include/linux/mtd/mtd.h

+1 −0
Original line number Diff line number Diff line
@@ -227,6 +227,7 @@ struct mtd_info { 
	int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);

	int (*_suspend) (struct mtd_info *mtd);

	void (*_resume) (struct mtd_info *mtd);

	void (*_reboot) (struct mtd_info *mtd);

	/*

	 * If the driver is something smart, like UBI, it may need to maintain

	 * its own reference counting. The below functions are only for driver.