[MTD] Add ECC statistics to struct mtd_info

FLASH - especially NAND FLASH - will become less reliable
and bit flips more likely. Add an ECC statistics struct
to struct mtd_info to keep track of this.

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

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index b8ad634391d..41a984dcb13 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -56,6 +56,17 @@ struct mtd_erase_region_info {
         u_int32_t numblocks;            /* Number of blocks of erasesize in this region */
 };
 
+/**
+ * struct mtd_ecc_stats - error correction status
+ *
+ * @corrected:  number of corrected bits
+ * @failed:     number of uncorrectable errors
+ */
+struct mtd_ecc_stats {
+        unsigned long corrected;
+        unsigned long failed;
+};
+
 struct mtd_info {
         u_char type;
         u_int32_t flags;
@@ -153,6 +164,9 @@ struct mtd_info {
 
         struct notifier_block reboot_notifier;  /* default mode before reboot */
 
+        /* ECC status information */
+        struct mtd_ecc_stats ecc_stats;
+
         void *priv;
 
         struct module *owner;