[MTD] NAND Replace oobinfo by ecclayout

The nand_oobinfo structure is not fitting the newer error correction
demands anymore. Replace it by struct nand_ecclayout and fixup the users
all over the place. Keep the nand_oobinfo based ioctl for user space
compability reasons.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 24 insertions, 2 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 608f7af679cb..e75ec5fe7760 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -512,14 +512,36 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
                 break;
         }
 
+        /* Legacy interface */
         case MEMGETOOBSEL:
         {
-                if (copy_to_user(argp, mtd->oobinfo,
-                                 sizeof(struct nand_oobinfo)))
+                struct nand_oobinfo oi;
+
+                if (!mtd->ecclayout)
+                        return -EOPNOTSUPP;
+                if (mtd->ecclayout->eccbytes > ARRAY_SIZE(oi.eccpos))
+                        return -EINVAL;
+
+                oi.useecc = MTD_NANDECC_AUTOPLACE;
+                memcpy(&oi.eccpos, mtd->ecclayout->eccpos, sizeof(oi.eccpos));
+                memcpy(&oi.oobfree, mtd->ecclayout->oobfree,
+                       sizeof(oi.oobfree));
+
+                if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo)))
                         return -EFAULT;
                 break;
         }
 
+        case ECCGETLAYOUT:
+
+                if (!mtd->ecclayout)
+                        return -EOPNOTSUPP;
+
+                if (copy_to_user(argp, &mtd->ecclayout,
+                                 sizeof(struct nand_ecclayout)))
+                        return -EFAULT;
+                break;
+
         case MEMGETBADBLOCK:
         {
                 loff_t offs;