3 files changed, 14 insertions, 2 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index b20625475132..bcb7f05fd27b 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -391,6 +391,7 @@ static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
         uint64_t start, uint32_t length, void __user *ptr,
         uint32_t __user *retp)
 {
+        struct mtd_file_info *mfi = file->private_data;
         struct mtd_oob_ops ops;
         uint32_t retlen;
         int ret = 0;
@@ -412,7 +413,7 @@ static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
         ops.ooblen = length;
         ops.ooboffs = start & (mtd->writesize - 1);
         ops.datbuf = NULL;
-        ops.mode = MTD_OOB_PLACE;
+        ops.mode = (mfi->mode == MTD_MODE_RAW) ? MTD_OOB_RAW : MTD_OOB_PLACE;
 
         if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs))
                 return -EINVAL;
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 7f2691f94322..b61a7c7bd097 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2404,7 +2404,11 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
                 chip->pagebuf = -1;
 
         nand_fill_oob(mtd, ops->oobbuf, ops->ooblen, ops);
-        status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask);
+
+        if (ops->mode == MTD_OOB_RAW)
+                status = chip->ecc.write_oob_raw(mtd, chip, page & chip->pagemask);
+        else
+                status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask);
 
         if (status)
                 return status;
@@ -3380,6 +3384,10 @@ int nand_scan_tail(struct mtd_info *mtd)
                 BUG();
         }
 
+        /* For many systems, the standard OOB write also works for raw */
+        if (!chip->ecc.write_oob_raw)
+                chip->ecc.write_oob_raw = chip->ecc.write_oob;
+
         /*
          * The number of bytes available for a client to place data into
          * the out of band area.
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 85fef68a379d..5f3fdd9877b7 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -340,6 +340,7 @@ struct nand_hw_control {
  * @read_subpage:       function to read parts of the page covered by ECC.
  * @write_page: function to write a page according to the ECC generator
  *              requirements.
+ * @write_oob_raw:      function to write chip OOB data without ECC
  * @read_oob:   function to read chip OOB data
  * @write_oob:  function to write chip OOB data
  */
@@ -368,6 +369,8 @@ struct nand_ecc_ctrl {
                         uint32_t offs, uint32_t len, uint8_t *buf);
         void (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
                         const uint8_t *buf);
+        int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
+                        int page);
         int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page,
                         int sndcmd);
         int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip,