[generic]: add initial 3.13 support

[openwrt.git] / target / linux / generic / patches-3.13 / 405-mtd-add-more-helper-functions.patch

diff --git a/target/linux/generic/patches-3.13/405-mtd-add-more-helper-functions.patch b/target/linux/generic/patches-3.13/405-mtd-add-more-helper-functions.patch
new file mode 100644 (file)
index 0000000..02a00fc
--- /dev/null
+++ b/target/linux/generic/patches-3.13/405-mtd-add-more-helper-functions.patch
@@ -0,0 +1,83 @@
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -434,14 +434,12 @@ 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;
+@@ -988,6 +986,24 @@ int mtd_is_partition(const struct mtd_in
+ }
+ EXPORT_SYMBOL_GPL(mtd_is_partition);
+ 
++struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd)
++{
++      if (!mtd_is_partition(mtd))
++              return (struct mtd_info *)mtd;
++
++      return PART(mtd)->master;
++}
++EXPORT_SYMBOL_GPL(mtdpart_get_master);
++
++uint64_t mtdpart_get_offset(const struct mtd_info *mtd)
++{
++      if (!mtd_is_partition(mtd))
++              return 0;
++
++      return PART(mtd)->offset;
++}
++EXPORT_SYMBOL_GPL(mtdpart_get_offset);
++
+ /* Returns the size of the entire flash chip */
+ uint64_t mtd_get_device_size(const struct mtd_info *mtd)
+ {
+--- a/include/linux/mtd/partitions.h
++++ b/include/linux/mtd/partitions.h
+@@ -90,6 +90,8 @@ int mtd_is_partition(const struct mtd_in
+ int mtd_add_partition(struct mtd_info *master, char *name,
+                     long long offset, long long length);
+ int mtd_del_partition(struct mtd_info *master, int partno);
++struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd);
++uint64_t mtdpart_get_offset(const struct mtd_info *mtd);
+ uint64_t mtd_get_device_size(const struct mtd_info *mtd);
+ extern void __weak arch_split_mtd_part(struct mtd_info *master,
+                                      const char *name, int offset, int size);
+--- a/include/linux/mtd/mtd.h
++++ b/include/linux/mtd/mtd.h
+@@ -331,6 +331,24 @@ static inline uint32_t mtd_mod_by_eb(uin
+       return do_div(sz, mtd->erasesize);
+ }
+ 
++static inline uint64_t mtd_roundup_to_eb(uint64_t sz, struct mtd_info *mtd)
++{
++      if (mtd_mod_by_eb(sz, mtd) == 0)
++              return sz;
++
++      /* Round up to next erase block */
++      return (mtd_div_by_eb(sz, mtd) + 1) * mtd->erasesize;
++}
++
++static inline uint64_t mtd_rounddown_to_eb(uint64_t sz, struct mtd_info *mtd)
++{
++      if (mtd_mod_by_eb(sz, mtd) == 0)
++              return sz;
++
++      /* Round down to the start of the current erase block */
++      return (mtd_div_by_eb(sz, mtd)) * mtd->erasesize;
++}
++
+ static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
+ {
+       if (mtd->writesize_shift)