[MTD] NAND Signal that a bitflip was corrected by ECC
Return -EUCLEAN on read when a bitflip was detected and corrected, so the
clients can react and eventually copy the affected block to a spare one.
Make all in kernel users aware of the change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 38151b8..3c8d5e6 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -56,7 +56,7 @@
size_t * retlen, u_char * buf)
{
struct mtd_concat *concat = CONCAT(mtd);
- int err = -EINVAL;
+ int ret = 0, err = -EINVAL;
int i;
*retlen = 0;
@@ -80,9 +80,18 @@
err = subdev->read(subdev, from, size, &retsize, buf);
- if (err)
+ if (err && (err != -EBADMSG) && (err != -EUCLEAN))
break;
+ /* Save information about bitflips! */
+ if (err) {
+ if (err == -EBADMSG)
+ ret = err;
+ else if (!ret)
+ ret = err;
+ err = 0;
+ }
+
*retlen += retsize;
len -= size;
if (len == 0)
@@ -92,7 +101,7 @@
buf += size;
from = 0;
}
- return err;
+ return err ? err : ret;
}
static int