150c200e91
UBI requires PEBs to be formatted (with a valid UBI header) or empty (0xFF), however CFE doesn't clear blocks after flashing the image. To workaround this problem, teach UBI to recognize EOF mark in a similar way JFFS2 handles that in OpenWrt. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> SVN-Revision: 42940
39 lines
1.2 KiB
Diff
39 lines
1.2 KiB
Diff
From f41f8b42db092e505382f7120994de21590dff48 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Date: Thu, 16 Oct 2014 20:52:16 +0200
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Subject: [PATCH] UBI: Detect EOF mark and erase all remaining blocks
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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---
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drivers/mtd/ubi/io.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
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index d361349..f9bba3c 100644
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--- a/drivers/mtd/ubi/io.c
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+++ b/drivers/mtd/ubi/io.c
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@@ -727,6 +727,7 @@ bad:
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* o %UBI_IO_FF if only 0xFF bytes were read (the PEB is supposedly empty)
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* o a negative error code in case of failure.
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*/
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+static bool erase_all_next = false;
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int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
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struct ubi_ec_hdr *ec_hdr, int verbose)
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{
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@@ -753,6 +754,10 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
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}
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magic = be32_to_cpu(ec_hdr->magic);
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+ if (magic == 0xdeadc0de)
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+ erase_all_next = true;
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+ if (erase_all_next)
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+ return read_err ? UBI_IO_FF_BITFLIPS : UBI_IO_FF;
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if (magic != UBI_EC_HDR_MAGIC) {
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if (mtd_is_eccerr(read_err))
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return UBI_IO_BAD_HDR_EBADMSG;
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--
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1.8.4.5
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