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| author | John Crispin <blogic@openwrt.org> | 2014-11-17 08:34:03 +0000 |
|---|---|---|
| committer | John Crispin <blogic@openwrt.org> | 2014-11-17 08:34:03 +0000 |
| commit | 1704e80f584f32795123e516c11bad0c43d2965f (patch) | |
| tree | 0bd257215b1fcfb4bece4576763fecc1a2ef713b /target | |
| parent | 7eee8e6e42bc5b462321a4d4732a6238ac965943 (diff) | |
| download | upstream-1704e80f584f32795123e516c11bad0c43d2965f.tar.gz upstream-1704e80f584f32795123e516c11bad0c43d2965f.tar.bz2 upstream-1704e80f584f32795123e516c11bad0c43d2965f.zip | |
kernel: add the ubifs EOF marker support to 3.14 kernel
Without this patch the UBIFS driver is unable to attach to the mtd
storage and mount the root FS.
Fixes a kernel panic with Netgear WNDR4300/3700v4 devices.
Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43287 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch b/target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch new file mode 100644 index 0000000000..cd02c13e0c --- /dev/null +++ b/target/linux/generic/patches-3.14/490-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; + }; + |