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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-10 11:38:44 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-10 11:38:44 +0000
commit9529ea409f6897ae3ff0b313ae90cb985eb859dd (patch)
tree018c21903bd7b659cccc15498701bb37be5eb6bf
parent0fe273b904f7122c547d984575a65bd57e2ed4c4 (diff)
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 <tharvey@gateworks.com> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33681 3c298f89-4303-0410-b956-a3cf2f4a3e73
-rw-r--r--target/linux/generic/patches-3.3/478-mtd-partial_eraseblock_unlock.patch18
1 files changed, 18 insertions, 0 deletions
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)