mtd: rawnand: atmel: Update ecc_stats.corrected counter

stable inclusion
from stable-5.10.36
commit 706e60c1923718d145ca5550aecc3228c54dd3b0
bugzilla: 51867
CVE: NA

--------------------------------

commit 33cebf70 upstream.

Update MTD ECC statistics with the number of corrected bits.

Fixes: f88fc122 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Cc: stable@vger.kernel.org
Signed-off-by: NKai Stuhlemmer (ebee Engineering) <kai.stuhlemmer@ebee.de>
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210322150714.101585-1-tudor.ambarus@microchip.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/mtd/nand/raw/atmel/nand-controller.c

@@ -883,10 +883,12 @@ static int atmel_nand_pmecc_correct_data(struct nand_chip *chip, void *buf,
 							  NULL, 0,
 							  chip->ecc.strength);
 
-		if (ret >= 0)
+		if (ret >= 0) {
+			mtd->ecc_stats.corrected += ret;
 			max_bitflips = max(ret, max_bitflips);
-		else
+		} else {
 			mtd->ecc_stats.failed++;
+		}
 
 		databuf += chip->ecc.size;
 		eccbuf += chip->ecc.bytes;