mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 23:42:43 +00:00
61 lines
1.4 KiB
Diff
61 lines
1.4 KiB
Diff
From: Gabor Juhos <juhosg@openwrt.org>
|
|
Subject: mtd: add EOF marker support to the UBI layer
|
|
|
|
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
|
|
---
|
|
drivers/mtd/ubi/attach.c | 25 ++++++++++++++++++++++---
|
|
drivers/mtd/ubi/ubi.h | 1 +
|
|
2 files changed, 23 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/mtd/ubi/attach.c
|
|
+++ b/drivers/mtd/ubi/attach.c
|
|
@@ -926,6 +926,13 @@ static bool vol_ignored(int vol_id)
|
|
#endif
|
|
}
|
|
|
|
+static bool ec_hdr_has_eof(struct ubi_ec_hdr *ech)
|
|
+{
|
|
+ return ech->padding1[0] == 'E' &&
|
|
+ ech->padding1[1] == 'O' &&
|
|
+ ech->padding1[2] == 'F';
|
|
+}
|
|
+
|
|
/**
|
|
* scan_peb - scan and process UBI headers of a PEB.
|
|
* @ubi: UBI device description object
|
|
@@ -958,9 +965,21 @@ static int scan_peb(struct ubi_device *u
|
|
return 0;
|
|
}
|
|
|
|
- err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
|
|
- if (err < 0)
|
|
- return err;
|
|
+ if (!ai->eof_found) {
|
|
+ err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
|
|
+ if (err < 0)
|
|
+ return err;
|
|
+
|
|
+ if (ec_hdr_has_eof(ech)) {
|
|
+ pr_notice("UBI: EOF marker found, PEBs from %d will be erased\n",
|
|
+ pnum);
|
|
+ ai->eof_found = true;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (ai->eof_found)
|
|
+ err = UBI_IO_FF_BITFLIPS;
|
|
+
|
|
switch (err) {
|
|
case 0:
|
|
break;
|
|
--- a/drivers/mtd/ubi/ubi.h
|
|
+++ b/drivers/mtd/ubi/ubi.h
|
|
@@ -782,6 +782,7 @@ struct ubi_attach_info {
|
|
int mean_ec;
|
|
uint64_t ec_sum;
|
|
int ec_count;
|
|
+ bool eof_found;
|
|
struct kmem_cache *aeb_slab_cache;
|
|
struct ubi_ec_hdr *ech;
|
|
struct ubi_vid_io_buf *vidb;
|