2018-11-01 16:57:55 +00:00
|
|
|
From: Tim Harvey <tharvey@gateworks.com>
|
|
|
|
|
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
|
|
|
|
|
|
|
|
|
|
[john@phrozen.org: this should be moved to the ixp4xx folder]
|
|
|
|
|
|
|
|
|
|
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
|
|
|
|
|
---
|
|
|
|
|
drivers/mtd/mtdpart.c | 11 ++++++++++-
|
|
|
|
|
1 file changed, 10 insertions(+), 1 deletion(-)
|
|
|
|
|
|
|
|
|
|
--- a/drivers/mtd/mtdpart.c
|
|
|
|
|
+++ b/drivers/mtd/mtdpart.c
|
2018-11-01 17:01:44 +00:00
|
|
|
@@ -307,7 +307,16 @@ static int part_lock(struct mtd_info *mt
|
2018-11-01 16:57:55 +00:00
|
|
|
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
|
|
|
|
{
|
|
|
|
|
struct mtd_part *part = mtd_to_part(mtd);
|
|
|
|
|
- return part->parent->_unlock(part->parent, 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->parent) + 1) * part->parent->erasesize;
|
|
|
|
|
+ ofs &= ~(part->parent->erasesize - 1);
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ return part->parent->_unlock(part->parent, ofs, len);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
