[MTD] Disconnect struct mtd_info from ABI

mtdchar.c direcly copied part of struct mtd_info to userspace, thereby
implicitly making it part of the ABI.  With this patch, struct
mtd_info is independent of the ABI and can have its fields removed,
reordered, etc.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index fdc535b22e39..5dd0b8d72c8b 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -380,6 +380,7 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
         void __user *argp = (void __user *)arg;
         int ret = 0;
         u_long size;
+        struct mtd_info_user info;
 
         DEBUG(MTD_DEBUG_LEVEL0, "MTD_ioctl\n");
 
@@ -415,7 +416,15 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
         }
 
         case MEMGETINFO:
-                if (copy_to_user(argp, mtd, sizeof(struct mtd_info_user)))
+                info.type       = mtd->type;
+                info.flags      = mtd->flags;
+                info.size       = mtd->size;
+                info.erasesize  = mtd->erasesize;
+                info.writesize  = mtd->writesize;
+                info.oobsize    = mtd->oobsize;
+                info.ecctype    = mtd->ecctype;
+                info.eccsize    = mtd->eccsize;
+                if (copy_to_user(argp, &info, sizeof(struct mtd_info_user)))
                         return -EFAULT;
                 break;