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authorRichard Genoud <richard.genoud@gmail.com>2012-07-10 18:23:40 +0200
committerArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-09-04 09:38:58 +0300
commit62082e56cbb807cb325a8968f35dbd922432eb48 (patch)
tree7774c4a45743e1b7bbefb1c7363c9af3185a51c5
parent5dee4674c8dd4398f4806aae153888319c7e2be9 (diff)
downloadop-kernel-dev-62082e56cbb807cb325a8968f35dbd922432eb48.zip
op-kernel-dev-62082e56cbb807cb325a8968f35dbd922432eb48.tar.gz
mtd: mtdparts: introduce mtd_get_device_size
'mtd_get_device_size()' returns the size of the whole MTD device, that is the mtd_info master size. This will be used by UBI to calculate the maximum number of bad blocks (MBB) on a MTD device. Artem: amended the patch a bit. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
-rw-r--r--drivers/mtd/mtdpart.c10
-rw-r--r--include/linux/mtd/partitions.h1
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 8500584..3a49e6d 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -760,3 +760,13 @@ int mtd_is_partition(const struct mtd_info *mtd)
return ispart;
}
EXPORT_SYMBOL_GPL(mtd_is_partition);
+
+/* Returns the size of the entire flash chip */
+uint64_t mtd_get_device_size(const struct mtd_info *mtd)
+{
+ if (!mtd_is_partition(mtd))
+ return mtd->size;
+
+ return PART(mtd)->master->size;
+}
+EXPORT_SYMBOL_GPL(mtd_get_device_size);
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index 02a5115..1f8d24b 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -83,5 +83,6 @@ int mtd_is_partition(const struct mtd_info *mtd);
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);
+uint64_t mtd_get_device_size(const struct mtd_info *mtd);
#endif
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