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| author | Rafał Miłecki <zajec5@gmail.com> | 2014-10-16 20:52:22 +0000 |
|---|---|---|
| committer | Rafał Miłecki <zajec5@gmail.com> | 2014-10-16 20:52:22 +0000 |
| commit | 150c200e911e217cc1efa64818cd6f4114c4f3e6 (patch) | |
| tree | f4ee313bf71f8999b65addec307a9ab134d02479 | |
| parent | 1ffe299eab083ce4f580bfaa1e05e8b2239f6b60 (diff) | |
| download | mtk-20170518-150c200e911e217cc1efa64818cd6f4114c4f3e6.zip mtk-20170518-150c200e911e217cc1efa64818cd6f4114c4f3e6.tar.gz mtk-20170518-150c200e911e217cc1efa64818cd6f4114c4f3e6.tar.bz2 | |
bcm53xx: hack UBI to erase all dirty blocks left by CFE
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
| -rw-r--r-- | target/linux/bcm53xx/patches-3.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-3.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch b/target/linux/bcm53xx/patches-3.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch new file mode 100644 index 0000000..50a89cb --- /dev/null +++ b/target/linux/bcm53xx/patches-3.14/500-UBI-Detect-EOF-mark-and-erase-all-remaining-blocks.patch @@ -0,0 +1,39 @@ +From f41f8b42db092e505382f7120994de21590dff48 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/io.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c +index d361349..f9bba3c 100644 +--- a/drivers/mtd/ubi/io.c ++++ b/drivers/mtd/ubi/io.c +@@ -727,6 +727,7 @@ bad: + * o %UBI_IO_FF if only 0xFF bytes were read (the PEB is supposedly empty) + * o a negative error code in case of failure. + */ ++static bool erase_all_next = false; + int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum, + struct ubi_ec_hdr *ec_hdr, int verbose) + { +@@ -753,6 +754,10 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum, + } + + 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; +-- +1.8.4.5 + |