UBI: remove data_offset

'data_offset' parameter does not really make sense and it is not
needed. Get rid of it.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

2 files changed, 16 insertions, 29 deletions

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 071454376643..403c10a668bd 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -50,13 +50,11 @@
  * struct mtd_dev_param - MTD device parameter description data structure.
  * @name: MTD device name or number string
  * @vid_hdr_offs: VID header offset
- * @data_offs: data offset
  */
 struct mtd_dev_param
 {
         char name[MTD_PARAM_LEN_MAX];
         int vid_hdr_offs;
-        int data_offs;
 };
 
 /* Numbers of elements set in the @mtd_dev_param array */
@@ -512,7 +510,7 @@ static int io_init(struct ubi_device *ubi)
                 return -EINVAL;
         }
 
-        if (ubi->vid_hdr_offset < 0 || ubi->leb_start < ubi->vid_hdr_offset)
+        if (ubi->vid_hdr_offset < 0)
                 return -EINVAL;
 
         /*
@@ -562,10 +560,8 @@ static int io_init(struct ubi_device *ubi)
         }
 
         /* Similar for the data offset */
-        if (ubi->leb_start == 0) {
-                ubi->leb_start = ubi->vid_hdr_offset + ubi->vid_hdr_alsize;
-                ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
-        }
+        ubi->leb_start = ubi->vid_hdr_offset + ubi->vid_hdr_alsize;
+        ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
 
         dbg_msg("vid_hdr_offset   %d", ubi->vid_hdr_offset);
         dbg_msg("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
@@ -626,7 +622,6 @@ static int io_init(struct ubi_device *ubi)
  * ubi_attach_mtd_dev - attach an MTD device.
  * @mtd_dev: MTD device description object
  * @vid_hdr_offset: VID header offset
- * @data_offset: data offset
  *
  * This function attaches an MTD device to UBI. It first treats @mtd_dev as the
  * MTD device name, and tries to open it by this name. If it is unable to open,
@@ -637,8 +632,7 @@ static int io_init(struct ubi_device *ubi)
  * Note, the invocations of this function has to be serialized by the
  * @ubi_devices_mutex.
  */
-int ubi_attach_mtd_dev(struct mtd_info *mtd, int vid_hdr_offset,
-                       int data_offset)
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int vid_hdr_offset)
 {
         struct ubi_device *ubi;
         int i, err;
@@ -674,10 +668,9 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int vid_hdr_offset,
         ubi->mtd = mtd;
         ubi->ubi_num = i;
         ubi->vid_hdr_offset = vid_hdr_offset;
-        ubi->leb_start = data_offset;
 
-        dbg_msg("attaching mtd%d to ubi%d: VID header offset %d data offset %d",
-                mtd->index, ubi->ubi_num, vid_hdr_offset, data_offset);
+        dbg_msg("attaching mtd%d to ubi%d: VID header offset %d",
+                mtd->index, ubi->ubi_num, vid_hdr_offset);
 
         err = io_init(ubi);
         if (err)
@@ -942,7 +935,7 @@ static int __init ubi_init(void)
                 }
 
                 mutex_lock(&ubi_devices_mutex);
-                err = ubi_attach_mtd_dev(mtd, p->vid_hdr_offs, p->data_offs);
+                err = ubi_attach_mtd_dev(mtd, p->vid_hdr_offs);
                 mutex_unlock(&ubi_devices_mutex);
                 if (err < 0) {
                         put_mtd_device(mtd);
@@ -1094,13 +1087,9 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 
         if (tokens[1])
                 p->vid_hdr_offs = bytes_str_to_int(tokens[1]);
-        if (tokens[2])
-                p->data_offs = bytes_str_to_int(tokens[2]);
 
         if (p->vid_hdr_offs < 0)
                 return p->vid_hdr_offs;
-        if (p->data_offs < 0)
-                return p->data_offs;
 
         mtd_devs += 1;
         return 0;
@@ -1108,16 +1097,15 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 
 module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
 MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: "
-                      "mtd=<name|num>[,<vid_hdr_offs>,<data_offs>]. "
+                      "mtd=<name|num>[,<vid_hdr_offs>].\n"
                       "Multiple \"mtd\" parameters may be specified.\n"
-                      "MTD devices may be specified by their number or name. "
-                      "Optional \"vid_hdr_offs\" and \"data_offs\" parameters "
-                      "specify UBI VID header position and data starting "
-                      "position to be used by UBI.\n"
-                      "Example: mtd=content,1984,2048 mtd=4 - attach MTD device"
-                      "with name content using VID header offset 1984 and data "
-                      "start 2048, and MTD device number 4 using default "
-                      "offsets");
+                      "MTD devices may be specified by their number or name.\n"
+                      "Optional \"vid_hdr_offs\" parameter specifies UBI VID "
+                      "header position and data starting position to be used "
+                      "by UBI.\n"
+                      "Example: mtd=content,1984 mtd=4 - attach MTD device"
+                      "with name \"content\" using VID header offset 1984, and "
+                      "MTD device number 4 with default VID header offset.");
 
 MODULE_VERSION(__stringify(UBI_VERSION));
 MODULE_DESCRIPTION("UBI - Unsorted Block Images");
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 25ff15a7fc58..4c3607e5743e 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -483,8 +483,7 @@ int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
                          struct ubi_vid_hdr *vid_hdr);
 
 /* build.c */
-int ubi_attach_mtd_dev(struct mtd_info *mtd, int vid_hdr_offset,
-                       int data_offset);
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int vid_hdr_offset);
 int ubi_detach_mtd_dev(int ubi_num, int anyway);
 struct ubi_device *ubi_get_device(int ubi_num);
 void ubi_put_device(struct ubi_device *ubi);