kernel: drop unneeded modification of mtd_add_partition function

In old days mtd_add_partition was checking for partitions overlapping
which was breaking our splitting feature. We had to modify this function
by adding an extra bool dup_check parameter. Upstream commit:
3a434f66e6da ("mtd: part: Remove partition overlap checks")
removed that check so we don't need our modification anymore.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 47748

target/linux/generic/patches-4.4/400-mtd-add-rootfs-split-support.patch

@@ -40,7 +40,7 @@
  
  /* Our partition linked list */
  static LIST_HEAD(mtd_partitions);
-@@ -47,13 +49,14 @@ struct mtd_part {
+@@ -47,6 +49,8 @@ struct mtd_part {
  	struct list_head list;
  };
  
@@ -49,27 +49,7 @@
  /*
   * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
   * the pointer to that structure with this macro.
-  */
- #define PART(x)  ((struct mtd_part *)(x))
- 
--
- /*
-  * MTD methods which simply translate the effective address and pass through
-  * to the _real_ device.
-@@ -579,8 +582,10 @@ static int mtd_add_partition_attrs(struc
- 	return ret;
- }
- 
--int mtd_add_partition(struct mtd_info *master, const char *name,
--		      long long offset, long long length)
-+
-+static int
-+__mtd_add_partition(struct mtd_info *master, const char *name,
-+		    long long offset, long long length, bool dup_check)
- {
- 	struct mtd_partition part;
- 	struct mtd_part *new;
-@@ -612,6 +617,7 @@ int mtd_add_partition(struct mtd_info *m
+@@ -612,6 +616,7 @@ int mtd_add_partition(struct mtd_info *m
  	mutex_unlock(&mtd_partitions_mutex);
  
  	add_mtd_device(&new->mtd);
@@ -77,20 +57,7 @@
  
  	mtd_add_partition_attrs(new);
  
-@@ -619,6 +625,12 @@ int mtd_add_partition(struct mtd_info *m
- }
- EXPORT_SYMBOL_GPL(mtd_add_partition);
- 
-+int mtd_add_partition(struct mtd_info *master, const char *name,
-+		      long long offset, long long length)
-+{
-+	return __mtd_add_partition(master, name, offset, length, true);
-+}
-+
- int mtd_del_partition(struct mtd_info *master, int partno)
- {
- 	struct mtd_part *slave, *next;
-@@ -644,6 +656,35 @@ int mtd_del_partition(struct mtd_info *m
+@@ -644,6 +649,35 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -126,7 +93,7 @@
  /*
   * This function, given a master MTD object and a partition table, creates
   * and registers slave MTD objects which are bound to the master according to
-@@ -675,6 +716,7 @@ int add_mtd_partitions(struct mtd_info *
+@@ -675,6 +709,7 @@ int add_mtd_partitions(struct mtd_info *
  		mutex_unlock(&mtd_partitions_mutex);
  
  		add_mtd_device(&slave->mtd);

target/linux/generic/patches-4.4/401-mtd-add-support-for-different-partition-parser-types.patch

@@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -747,6 +747,30 @@ static struct mtd_part_parser *get_parti
+@@ -740,6 +740,30 @@ static struct mtd_part_parser *get_parti
  
  #define put_partition_parser(p) do { module_put((p)->owner); } while (0)
  
@@ -42,7 +42,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  void register_mtd_parser(struct mtd_part_parser *p)
  {
  	spin_lock(&part_parser_lock);
-@@ -875,6 +899,38 @@ int parse_mtd_partitions(struct mtd_info
+@@ -868,6 +892,38 @@ int parse_mtd_partitions(struct mtd_info
  	return err;
  }
  

target/linux/generic/patches-4.4/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch

@@ -1,6 +1,6 @@
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -656,6 +656,37 @@ int mtd_del_partition(struct mtd_info *m
+@@ -649,6 +649,36 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -23,11 +23,10 @@
 +		/* adjust partition offsets */
 +		parts[i].offset += slave->offset;
 +
-+		__mtd_add_partition(slave->master,
-+				    parts[i].name,
-+				    parts[i].offset,
-+				    parts[i].size,
-+				    false);
++		mtd_add_partition(slave->master,
++				  parts[i].name,
++				  parts[i].offset,
++				  parts[i].size);
 +	}
 +
 +	kfree(parts);
@@ -38,7 +37,7 @@
  #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #else
-@@ -664,6 +695,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
+@@ -657,6 +687,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
  
  static void split_firmware(struct mtd_info *master, struct mtd_part *part)
  {
@@ -46,7 +45,7 @@
  }
  
  void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
-@@ -678,6 +710,12 @@ static void mtd_partition_split(struct m
+@@ -671,6 +702,12 @@ static void mtd_partition_split(struct m
  	if (rootfs_found)
  		return;
  

target/linux/generic/patches-4.4/404-mtd-add-more-helper-functions.patch

@@ -1,6 +1,6 @@
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -453,14 +453,12 @@ static struct mtd_part *allocate_partiti
+@@ -454,14 +454,12 @@ static struct mtd_part *allocate_partiti
  	if (slave->offset == MTDPART_OFS_APPEND)
  		slave->offset = cur_offset;
  	if (slave->offset == MTDPART_OFS_NXTBLK) {
@@ -18,7 +18,7 @@
  	}
  	if (slave->offset == MTDPART_OFS_RETAIN) {
  		slave->offset = cur_offset;
-@@ -687,6 +685,17 @@ run_parsers_by_type(struct mtd_part *sla
+@@ -679,6 +677,17 @@ run_parsers_by_type(struct mtd_part *sla
  	return nr_parts;
  }
  
@@ -36,7 +36,7 @@
  #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #else
-@@ -986,6 +995,24 @@ int mtd_is_partition(const struct mtd_in
+@@ -978,6 +987,24 @@ int mtd_is_partition(const struct mtd_in
  }
  EXPORT_SYMBOL_GPL(mtd_is_partition);
  

target/linux/generic/patches-4.4/411-mtd-partial_eraseblock_write.patch

@@ -9,7 +9,7 @@
  /* Our partition linked list */
  static LIST_HEAD(mtd_partitions);
  static DEFINE_MUTEX(mtd_partitions_mutex);
-@@ -235,13 +237,61 @@ static int part_erase(struct mtd_info *m
+@@ -236,13 +238,61 @@ static int part_erase(struct mtd_info *m
  	struct mtd_part *part = PART(mtd);
  	int ret;
  
@@ -71,7 +71,7 @@
  	return ret;
  }
  
-@@ -249,7 +299,25 @@ void mtd_erase_callback(struct erase_inf
+@@ -250,7 +300,25 @@ void mtd_erase_callback(struct erase_inf
  {
  	if (instr->mtd->_erase == part_erase) {
  		struct mtd_part *part = PART(instr->mtd);
@@ -97,7 +97,7 @@
  		if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
  			instr->fail_addr -= part->offset;
  		instr->addr -= part->offset;
-@@ -522,17 +590,20 @@ static struct mtd_part *allocate_partiti
+@@ -523,17 +591,20 @@ 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 */

target/linux/generic/patches-4.4/412-mtd-partial_eraseblock_unlock.patch

@@ -1,6 +1,6 @@
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -336,7 +336,14 @@ static int part_lock(struct mtd_info *mt
+@@ -337,7 +337,14 @@ static int part_lock(struct mtd_info *mt
  static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
  {
  	struct mtd_part *part = PART(mtd);