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authorBrian Norris <computersforpeace@gmail.com>2014-11-26 12:01:08 +0300
committerBrian Norris <computersforpeace@gmail.com>2015-01-08 04:54:22 +0300
commit3efe41be224c4441f2a872a25471a14d85ceb7c6 (patch)
tree4ad8e184902893b5cffa0159e0bf9fdb2ea753c2 /drivers/mtd/mtdcore.c
parent362376a7c65936835f39ff29b082a646d522efbc (diff)
downloadlinux-3efe41be224c4441f2a872a25471a14d85ceb7c6.tar.xz
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>
Diffstat (limited to 'drivers/mtd/mtdcore.c')
-rw-r--r--drivers/mtd/mtdcore.c20
1 files changed, 20 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;