56 lines
1.8 KiB
Diff
56 lines
1.8 KiB
Diff
|
From 6750f61a13a0197c40e4a40739117493b15f19e8 Mon Sep 17 00:00:00 2001
|
||
|
|
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
|
||
|
|
Date: Tue, 20 Nov 2018 10:24:09 +0100
|
||
|
|
Subject: [PATCH] mtd: improve calculating partition boundaries when checking
|
||
|
|
for alignment
|
||
|
|
MIME-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=UTF-8
|
||
|
|
Content-Transfer-Encoding: 8bit
|
||
|
|
|
||
|
|
When checking for alignment mtd should check absolute offsets. It's
|
||
|
|
important for subpartitions as it doesn't make sense to check their
|
||
|
|
relative addresses.
|
||
|
|
|
||
|
|
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
|
||
|
|
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
|
||
|
|
---
|
||
|
|
drivers/mtd/mtdpart.c | 13 +++++++++++--
|
||
|
|
1 file changed, 11 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/mtd/mtdpart.c
|
||
|
|
+++ b/drivers/mtd/mtdpart.c
|
||
|
|
@@ -61,6 +61,15 @@ static inline struct mtd_part *mtd_to_pa
|
||
|
|
return container_of(mtd, struct mtd_part, mtd);
|
||
|
|
}
|
||
|
|
|
||
|
|
+static u64 part_absolute_offset(struct mtd_info *mtd)
|
||
|
|
+{
|
||
|
|
+ struct mtd_part *part = mtd_to_part(mtd);
|
||
|
|
+
|
||
|
|
+ if (!mtd_is_partition(mtd))
|
||
|
|
+ return 0;
|
||
|
|
+
|
||
|
|
+ return part_absolute_offset(part->parent) + part->offset;
|
||
|
|
+}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* MTD methods which simply translate the effective address and pass through
|
||
|
|
@@ -562,7 +571,7 @@ static struct mtd_part *allocate_partiti
|
||
|
|
if (!(slave->mtd.flags & MTD_NO_ERASE))
|
||
|
|
wr_alignment = slave->mtd.erasesize;
|
||
|
|
|
||
|
|
- tmp = slave->offset;
|
||
|
|
+ tmp = part_absolute_offset(parent) + slave->offset;
|
||
|
|
remainder = do_div(tmp, wr_alignment);
|
||
|
|
if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
|
||
|
|
/* Doesn't start on a boundary of major erase size */
|
||
|
|
@@ -573,7 +582,7 @@ static struct mtd_part *allocate_partiti
|
||
|
|
part->name);
|
||
|
|
}
|
||
|
|
|
||
|
|
- tmp = slave->mtd.size;
|
||
|
|
+ tmp = part_absolute_offset(parent) + slave->mtd.size;
|
||
|
|
remainder = do_div(tmp, wr_alignment);
|
||
|
|
if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
|
||
|
|
slave->mtd.flags &= ~MTD_WRITEABLE;
|