openwrtv3/target/linux/generic/pending-4.9/494-mtd-ubi-add-EOF-marker-support.patch
Gabor Juhos 975e9cd866 kernel/4.9: add missing newline character to UBI messages
A few UBI messages lacks the trailing newline character which
leads to ugly lines in the bootlog like this:

  [    6.649159] UBI error: no valid UBI magic found inside mtd6[    6.667751] Freeing unused kernel memory: 2196K

Add a newline character to the end of the messages to fix it.
After the fix the line from above looks better in the log:

  [    6.609182] UBI error: no valid UBI magic found inside mtd6
  [    6.627599] Freeing unused kernel memory: 2132K

Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
2017-12-24 09:03:01 +01:00

60 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
@@ -939,6 +939,13 @@ 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
@@ -971,9 +978,21 @@ 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
@@ -779,6 +779,7 @@ 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;