mtd: Add a function to report when the MTD dev list has been updated
We need to parse mtdparts/mtids again everytime a device has been
added/removed from the MTD list, but there's currently no way to know
when such an update has been done.
Add an ->updated field to the idr struct that we set to true every time
a device is added/removed and expose a function returning the value
of this field and resetting it to false.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index fb6c779..7a15ded 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -87,14 +87,17 @@
struct idr {
struct idr_layer id[MAX_IDR_ID];
+ bool updated;
};
#define DEFINE_IDR(name) struct idr name;
void idr_remove(struct idr *idp, int id)
{
- if (idp->id[id].used)
+ if (idp->id[id].used) {
idp->id[id].used = 0;
+ idp->updated = true;
+ }
return;
}
@@ -134,6 +137,7 @@
if (idl->used == 0) {
idl->used = 1;
idl->ptr = ptr;
+ idp->updated = true;
return i;
}
i++;
@@ -155,6 +159,16 @@
}
EXPORT_SYMBOL_GPL(__mtd_next_device);
+bool mtd_dev_list_updated(void)
+{
+ if (mtd_idr.updated) {
+ mtd_idr.updated = false;
+ return true;
+ }
+
+ return false;
+}
+
#ifndef __UBOOT__
static LIST_HEAD(mtd_notifiers);