diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0053-mtd-add-EOF-marker-support-to-the-UBI-layer.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0053-mtd-add-EOF-marker-support-to-the-UBI-layer.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/nixos/modules/kernel-patches/0053-mtd-add-EOF-marker-support-to-the-UBI-layer.patch b/nixos/modules/kernel-patches/0053-mtd-add-EOF-marker-support-to-the-UBI-layer.patch new file mode 100644 index 0000000..165106b --- /dev/null +++ b/nixos/modules/kernel-patches/0053-mtd-add-EOF-marker-support-to-the-UBI-layer.patch @@ -0,0 +1,69 @@ +From 799bf4a0592b64708a5cb61b092f4b6a27cae435 Mon Sep 17 00:00:00 2001 +From: Gabor Juhos <juhosg@openwrt.org> +Date: Tue, 27 Sep 2022 16:22:01 +0200 +Subject: [PATCH 53/96] 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(-) + +diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c +index ae5abe492b52..7a16e0e252a7 100644 +--- 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 *ubi, struct ubi_attach_info *ai, + 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; +diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h +index 078112e23dfd..6f39e47b4869 100644 +--- a/drivers/mtd/ubi/ubi.h ++++ b/drivers/mtd/ubi/ubi.h +@@ -778,6 +778,7 @@ 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; +-- +2.37.2 + |