From 9529ea409f6897ae3ff0b313ae90cb985eb859dd Mon Sep 17 00:00:00 2001 From: nbd Date: Wed, 10 Oct 2012 11:38:44 +0000 Subject: mtd: allow partial block unlock This allows sysupgrade for devices such as the Gateworks Avila/Cambria product families based on the ixp4xx using the redboot bootloader with combined FIS directory and RedBoot config partitions on larger FLASH devices with larger eraseblocks. This second iteration of this patch addresses previous issues: - whitespace breakage fixed - unlock in all scenarios - simplification and fix logic bug Signed-off-by: Tim Harvey git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33681 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../478-mtd-partial_eraseblock_unlock.patch | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch (limited to 'target/linux') diff --git a/target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch b/target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch new file mode 100644 index 000000000..de4481a93 --- /dev/null +++ b/target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch @@ -0,0 +1,18 @@ +--- a/drivers/mtd/mtdpart.c ++++ b/drivers/mtd/mtdpart.c +@@ -356,7 +356,14 @@ static int part_unlock(struct mtd_info * + struct mtd_part *part = PART(mtd); + if ((len + ofs) > mtd->size) + return -EINVAL; +- return mtd_unlock(part->master, ofs + part->offset, len); ++ ++ ofs += part->offset; ++ if (mtd->flags & MTD_ERASE_PARTIAL) { ++ /* round up len to next erasesize and round down offset to prev block */ ++ len = (mtd_div_by_eb(len, part->master) + 1) * part->master->erasesize; ++ ofs &= ~(part->master->erasesize - 1); ++ } ++ return mtd_unlock(part->master, ofs, len); + } + + static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) -- cgit v1.2.3