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| author | John Crispin <blogic@openwrt.org> | 2015-03-11 15:54:52 +0000 |
|---|---|---|
| committer | John Crispin <blogic@openwrt.org> | 2015-03-11 15:54:52 +0000 |
| commit | 7dc5e80b5edc64f65314a9139a39110dc1a8fc53 (patch) | |
| tree | df6fc7d8886a60d3b0b3065b4bc75311da0e0dd4 | |
| parent | 93cd017604893d240662fb63d14a8de45b189936 (diff) | |
| download | master-187ad058-7dc5e80b5edc64f65314a9139a39110dc1a8fc53.tar.gz master-187ad058-7dc5e80b5edc64f65314a9139a39110dc1a8fc53.tar.bz2 master-187ad058-7dc5e80b5edc64f65314a9139a39110dc1a8fc53.zip | |
Fix 3.18.8 breakage of UBI devices with EOF marker (e.g. WNDR4300)
This commit re-adds a patch from 3.14 that is required for UBI block
devices with an EOF marker to be successfully mounted.
Signed-off-by: Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44658 3c298f89-4303-0410-b956-a3cf2f4a3e73
| -rw-r--r-- | target/linux/generic/patches-3.18/490-mtd-ubi-add-EOF-marker-support.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/490-mtd-ubi-add-EOF-marker-support.patch b/target/linux/generic/patches-3.18/490-mtd-ubi-add-EOF-marker-support.patch new file mode 100644 index 0000000000..cd02c13e0c --- /dev/null +++ b/target/linux/generic/patches-3.18/490-mtd-ubi-add-EOF-marker-support.patch @@ -0,0 +1,51 @@ +--- a/drivers/mtd/ubi/attach.c ++++ b/drivers/mtd/ubi/attach.c +@@ -800,6 +800,13 @@ out_unlock: + return err; + } + ++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 +@@ -830,9 +837,21 @@ static int scan_peb(struct ubi_device *u + 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)) { ++ ubi_msg("EOF marker found, PEBs from %d will be erased", ++ pnum); ++ ai->eof_found = true; ++ } ++ } ++ ++ if (ai->eof_found) ++ err = UBI_IO_FF_BITFLIPS; ++ + switch (err) { + case 0: + break; +--- a/drivers/mtd/ubi/ubi.h ++++ b/drivers/mtd/ubi/ubi.h +@@ -701,6 +701,7 @@ struct ubi_attach_info { + int mean_ec; + uint64_t ec_sum; + int ec_count; ++ bool eof_found; + struct kmem_cache *aeb_slab_cache; + }; + |