mtd: rawnand: meson: fix bit map use in meson_nfc_ecc_correct()

[ Upstream commit 3e4ad3212cf22687410b1e8f4e68feec50646113 ]

The meson_nfc_ecc_correct() function accidentally does a right shift
instead of a left shift so it only works for BIT(0).  Also use
BIT_ULL() because "correct_bitmap" is a u64 and we want to avoid
shift wrapping bugs.

Fixes: 8fae856c5350 ("mtd: rawnand: meson: add support for Amlogic NAND flash controller")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Liang Yang <liang.yang@amlogic.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/YuI2zF1hP65+LE7r@kili
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index 0321801..b97adee 100644 (file)
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -454,7 +454,7 @@ static int meson_nfc_ecc_correct(struct nand_chip *nand, u32 *bitflips,
                if (ECC_ERR_CNT(*info) != ECC_UNCORRECTABLE) {
                        mtd->ecc_stats.corrected += ECC_ERR_CNT(*info);
                        *bitflips = max_t(u32, *bitflips, ECC_ERR_CNT(*info));
-                       *correct_bitmap |= 1 >> i;
+                       *correct_bitmap |= BIT_ULL(i);
                        continue;
                }
                if ((nand->options & NAND_NEED_SCRAMBLING) &&
@@ -800,7 +800,7 @@ static int meson_nfc_read_page_hwecc(struct nand_chip *nand, u8 *buf,
                        u8 *data = buf + i * ecc->size;
                        u8 *oob = nand->oob_poi + i * (ecc->bytes + 2);
 
-                       if (correct_bitmap & (1 << i))
+                       if (correct_bitmap & BIT_ULL(i))
                                continue;
                        ret = nand_check_erased_ecc_chunk(data, ecc->size,
                                                          oob, ecc->bytes + 2,