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kernel: don't switch allocate_partition to use mtd_roundup_to_eb 

This mtd_roundup_to_eb helper was introduced years ago in the commit
daec7ad768 ("kernel/3.10: add separate rootfs partition parser") and
it was probably supposed to simplify code a bit.

With the recent upstream commit 1eeef2d7483a7 ("mtd: handle partitioning
on devices with 0 erasesize") the logic in allocate_partition got
slightly more complex and we can't use this simple helper anymore as it
doesn't support MTD_NO_ERASE properly.

There also isn't any real gain from this helper, so it's probably easier
to just don't use it *or* work on upstreaming it to avoid maintenance
cost.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
openwrt-18.06
Rafał Miłecki 2017-06-23 08:59:46 +02:00
parent b91a38d647
commit 4052443a23
2 changed files with 3 additions and 21 deletions
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22
target/linux/generic/patches-4.9/404-mtd-add-more-helper-functions.patch
View File

@ -1,24 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -493,14 +493,12 @@ static struct mtd_part *allocate_partiti
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
- slave->offset = cur_offset;
- if (mtd_mod_by_eb(cur_offset, master) != 0) {
- /* Round up to next erasesize */
- slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
+ /* Round up to next erasesize */
+ slave->offset = mtd_roundup_to_eb(cur_offset, master);
+ if (slave->offset != cur_offset)
printk(KERN_NOTICE "Moving partition %d: "
"0x%012llx -> 0x%012llx\n", partno,
(unsigned long long)cur_offset, (unsigned long long)slave->offset);
- }
}
if (slave->offset == MTDPART_OFS_RETAIN) {
slave->offset = cur_offset;
@@ -717,6 +715,17 @@ run_parsers_by_type(struct mtd_part *sla
@@ -717,6 +717,17 @@ run_parsers_by_type(struct mtd_part *sla
return nr_parts;
}
@ -36,7 +18,7 @@
#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
#else
@@ -1055,6 +1064,24 @@ int mtd_is_partition(const struct mtd_in
@@ -1055,6 +1066,24 @@ int mtd_is_partition(const struct mtd_in
}
EXPORT_SYMBOL_GPL(mtd_is_partition);

2
target/linux/generic/patches-4.9/411-mtd-partial_eraseblock_write.patch
View File

@ -97,7 +97,7 @@
if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
@@ -562,17 +631,20 @@ static struct mtd_part *allocate_partiti
@@ -564,17 +633,20 @@ static struct mtd_part *allocate_partiti
if ((slave->mtd.flags & MTD_WRITEABLE) &&
mtd_mod_by_eb(slave->offset, &slave->mtd)) {
/* Doesn't start on a boundary of major erase size */