From: Weijie Gao <hackpas...@gmail.com>
Some firmware have already defined rootfs/rootfs_data partitions and do not
need extra split operations.
This patch adds two kernel cmdline parameters to disable firmware and rootfs
parsers separately:
nofwsplit
norootfssplit
Signed-off-by: Weijie Gao <hackpas...@gmail.com>
---
...d-kernel-cmdline-to-disable-split-parsers.patch | 56 ++++++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644
target/linux/generic/pending-4.4/405-mtd-add-kernel-cmdline-to-disable-split-parsers.patch
diff --git
a/target/linux/generic/pending-4.4/405-mtd-add-kernel-cmdline-to-disable-split-parsers.patch
b/target/linux/generic/pending-4.4/405-mtd-add-kernel-cmdline-to-disable-split-parsers.patch
new file mode 100644
index 0000000000..b0a666a401
--- /dev/null
+++
b/target/linux/generic/pending-4.4/405-mtd-add-kernel-cmdline-to-disable-split-parsers.patch
@@ -0,0 +1,56 @@
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -39,6 +39,10 @@
+
+ #define MTD_ERASE_PARTIAL 0x8000 /* partition only covers parts of an
erase block */
+
++/* Do not split firmware/rootfs partition */
++static bool no_fw_split_flag = 0;
++static bool no_rootfs_split_flag = 0;
++
+ /* Our partition linked list */
+ static LIST_HEAD(mtd_partitions);
+ static DEFINE_MUTEX(mtd_partitions_mutex);
+@@ -774,6 +778,9 @@ mtd_pad_erasesize(struct mtd_info *mtd,
+
+ static void split_firmware(struct mtd_info *master, struct mtd_part *part)
+ {
++ if (no_fw_split_flag)
++ return;
++
+ run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
+ }
+
+@@ -790,7 +797,8 @@ static void mtd_partition_split(struct m
+ return;
+
+ if (!strcmp(part->mtd.name, "rootfs")) {
+- run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
++ if (!no_rootfs_split_flag)
++ run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
+
+ rootfs_found = 1;
+ }
+@@ -1092,3 +1100,22 @@ uint64_t mtd_get_device_size(const struc
+ return PART(mtd)->master->size;
+ }
+ EXPORT_SYMBOL_GPL(mtd_get_device_size);
++
++
++static int __init no_fw_split(char *str)
++{
++ no_fw_split_flag = 1;
++
++ return 0;
++}
++
++early_param("nofwsplit", no_fw_split);
++
++static int __init no_rootfs_split(char *str)
++{
++ no_rootfs_split_flag = 1;
++
++ return 0;
++}
++
++early_param("norootfssplit", no_rootfs_split);
--
2.11.0
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