Author: blogic Date: 2014-11-17 09:34:03 +0100 (Mon, 17 Nov 2014) New Revision: 43287
Added: trunk/target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch Log: 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 <[email protected]> Added: trunk/target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch =================================================================== --- trunk/target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch (rev 0) +++ trunk/target/linux/generic/patches-3.14/490-mtd-ubi-add-EOF-marker-support.patch 2014-11-17 08:34:03 UTC (rev 43287) @@ -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; + }; + _______________________________________________ openwrt-commits mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-commits
