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| author | John Thomson <git@johnthomson.fastmail.com.au> | 2020-08-06 07:13:54 +1000 |
|---|---|---|
| committer | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2020-09-19 12:41:29 +0200 |
| commit | bf2870c1d9e162f27925e9c40eca9e0069096f3b (patch) | |
| tree | 6ff4fd7999dddb1149a27b839a681800f06429d4 /target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch | |
| parent | 8cfb839907ad3b18decc053771d619a7fff9f99b (diff) | |
| download | upstream-bf2870c1d9e162f27925e9c40eca9e0069096f3b.tar.gz upstream-bf2870c1d9e162f27925e9c40eca9e0069096f3b.tar.bz2 upstream-bf2870c1d9e162f27925e9c40eca9e0069096f3b.zip | |
kernel: fix mtd partition erase < parent_erasesize writes
This bug applied where mtd partition end address,
or erase start address, was not cleanly divisible by parent mtd erasesize.
This error would cause the bits following the end of the partition
to the next erasesize block boundary to be erased,
and this partition-overflow data to be written to the partition erase
address (missing additional partition offset address)
of the mtd (top) parent device.
Fixes: FS#2428
Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
Tested-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
[shorten commit title, add Fixes, fix kernel 4.19 as well]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Diffstat (limited to 'target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch b/target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch index b46c3f5ed4..c48a144d3d 100644 --- a/target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch +++ b/target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch @@ -19,7 +19,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name> /* Our partition linked list */ static LIST_HEAD(mtd_partitions); static DEFINE_MUTEX(mtd_partitions_mutex); -@@ -206,6 +208,53 @@ static int part_erase(struct mtd_info *m +@@ -206,11 +208,77 @@ static int part_erase(struct mtd_info *m { struct mtd_part *part = mtd_to_part(mtd); int ret; @@ -73,10 +73,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name> instr->addr += part->offset; ret = part->parent->_erase(part->parent, instr); -@@ -213,6 +262,24 @@ static int part_erase(struct mtd_info *m + if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) instr->fail_addr -= part->offset; - instr->addr -= part->offset; - ++ + if (mtd->flags & MTD_ERASE_PARTIAL) { + if (partial_start) { + part->parent->_write(part->parent, @@ -95,10 +94,10 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name> + kfree(erase_buf); + } + - return ret; - } + instr->addr -= part->offset; -@@ -525,19 +592,22 @@ static struct mtd_part *allocate_partiti + return ret; +@@ -525,19 +593,22 @@ static struct mtd_part *allocate_partiti remainder = do_div(tmp, wr_alignment); if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { /* Doesn't start on a boundary of major erase size */ |