diff options
| author | Brian Norris <computersforpeace@gmail.com> | 2014-11-26 01:01:08 -0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2015-01-07 17:54:22 -0800 |
| commit | 3efe41be224c4441f2a872a25471a14d85ceb7c6 (patch) | |
| tree | 4ad8e184902893b5cffa0159e0bf9fdb2ea753c2 | |
| parent | 362376a7c65936835f39ff29b082a646d522efbc (diff) | |
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: Brian Norris <computersforpeace@gmail.com>
Tested-by: Scott Branden <sbranden@broadcom.com>
| -rw-r--r-- | drivers/mtd/mtdcore.c | 20 | ||||
| -rw-r--r-- | include/linux/mtd/mtd.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 4c611871d7e6..cbc0fc46d2d6 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -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; diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 031ff3a9a0bd..c06f5373d870 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -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. |