diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-4.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch b/target/linux/bcm53xx/patches-4.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch new file mode 100644 index 0000000000..271d98cc8c --- /dev/null +++ b/target/linux/bcm53xx/patches-4.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch @@ -0,0 +1,59 @@ +From 2a2af518266a29323cf30c3f9ba9ef2ceb1dd84b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> +Date: Thu, 16 Oct 2014 20:52:16 +0200 +Subject: [PATCH] UBI: Detect EOF mark and erase all remaining blocks +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Signed-off-by: Rafał Miłecki <zajec5@gmail.com> +--- + drivers/mtd/ubi/attach.c | 5 +++++ + drivers/mtd/ubi/io.c | 4 ++++ + drivers/mtd/ubi/ubi.h | 1 + + 3 files changed, 10 insertions(+) + +--- a/drivers/mtd/ubi/attach.c ++++ b/drivers/mtd/ubi/attach.c +@@ -95,6 +95,9 @@ static int self_check_ai(struct ubi_devi + #define AV_ADD BIT(1) + #define AV_FIND_OR_ADD (AV_FIND | AV_ADD) + ++/* Set on finding block with 0xdeadc0de, indicates erasing all blocks behind */ ++bool erase_all_next; ++ + /** + * find_or_add_av - internal function to find a volume, add a volume or do + * both (find and add if missing). +@@ -1592,6 +1595,8 @@ int ubi_attach(struct ubi_device *ubi, i + if (!ai) + return -ENOMEM; + ++ erase_all_next = false; ++ + #ifdef CONFIG_MTD_UBI_FASTMAP + /* On small flash devices we disable fastmap in any case. */ + if ((int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd) <= UBI_FM_MAX_START) { +--- a/drivers/mtd/ubi/io.c ++++ b/drivers/mtd/ubi/io.c +@@ -759,6 +759,10 @@ int ubi_io_read_ec_hdr(struct ubi_device + } + + magic = be32_to_cpu(ec_hdr->magic); ++ if (magic == 0xdeadc0de) ++ erase_all_next = true; ++ if (erase_all_next) ++ return read_err ? UBI_IO_FF_BITFLIPS : UBI_IO_FF; + if (magic != UBI_EC_HDR_MAGIC) { + if (mtd_is_eccerr(read_err)) + return UBI_IO_BAD_HDR_EBADMSG; +--- a/drivers/mtd/ubi/ubi.h ++++ b/drivers/mtd/ubi/ubi.h +@@ -822,6 +822,7 @@ extern struct mutex ubi_devices_mutex; + extern struct blocking_notifier_head ubi_notifiers; + + /* attach.c */ ++extern bool erase_all_next; + struct ubi_ainf_peb *ubi_alloc_aeb(struct ubi_attach_info *ai, int pnum, + int ec); + void ubi_free_aeb(struct ubi_attach_info *ai, struct ubi_ainf_peb *aeb); |