summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBoris Brezillon <boris.brezillon@bootlin.com>2018-12-02 10:54:22 +0100
committerJagan Teki <jagan@amarulasolutions.com>2018-12-06 00:45:36 +0530
commit4c47fd0b6bce62162e11b8a22e2eaf0d8f6673b1 (patch)
tree59ef6abd0b8e5927c5a7ffe9b51b51b8d25984c4
parentef6ce46ad889d935dce26133232943aa302bd901 (diff)
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>
-rw-r--r--drivers/mtd/mtdcore.c16
-rw-r--r--include/linux/mtd/mtd.h1
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index fb6c779abb..7a15ded8c8 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -87,14 +87,17 @@ struct idr_layer {
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 @@ int idr_alloc(struct idr *idp, void *ptr, int start, int end, gfp_t gfp_mask)
if (idl->used == 0) {
idl->used = 1;
idl->ptr = ptr;
+ idp->updated = true;
return i;
}
i++;
@@ -155,6 +159,16 @@ struct mtd_info *__mtd_next_device(int i)
}
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);
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 68e5915324..d20ebd8202 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -581,6 +581,7 @@ int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
void mtd_get_len_incl_bad(struct mtd_info *mtd, uint64_t offset,
const uint64_t length, uint64_t *len_incl_bad,
int *truncated);
+bool mtd_dev_list_updated(void);
/* drivers/mtd/mtd_uboot.c */
int mtd_search_alternate_name(const char *mtdname, char *altname,