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- 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
- static struct ubi_ec_hdr *ech;
- static struct ubi_vid_hdr *vidh;
-
- +/* Set on finding block with 0xdeadc0de, indicates erasing all blocks behind */
- +bool erase_all_next;
- +
- /**
- * add_to_list - add physical eraseblock to a list.
- * @ai: attaching information
- @@ -1425,6 +1428,8 @@ 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
- @@ -755,6 +755,10 @@ 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
- @@ -783,6 +783,7 @@ extern struct mutex ubi_devices_mutex;
- extern struct blocking_notifier_head ubi_notifiers;
-
- /* attach.c */
- +extern bool erase_all_next;
- int ubi_add_to_av(struct ubi_device *ubi, struct ubi_attach_info *ai, int pnum,
- int ec, const struct ubi_vid_hdr *vid_hdr, int bitflips);
- struct ubi_ainf_volume *ubi_find_av(const struct ubi_attach_info *ai,
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