kernel: mtk_bmt: pass number of bitflips on read to the caller

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
index 14fbd246d7262fcf6008d9a66f570706408fb6b3..84538f9180dfb729ae88553945cc49af7785d6ed 100644 (file)
--- a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
+++ b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
@@ -497,6 +497,7 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
        int retry_count = 0;
        loff_t cur_from;
        int ret = 0;
+       int max_bitflips = 0;
 
        ops->retlen = 0;
        ops->oobretlen = 0;
@@ -518,12 +519,14 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
                cur_ret = bmtd._read_oob(mtd, cur_from, &cur_ops);
                if (cur_ret < 0)
                        ret = cur_ret;
+               else
+                       max_bitflips = max_t(int, max_bitflips, cur_ret);
                if (cur_ret < 0 && !mtd_is_bitflip(cur_ret)) {
                        update_bmt(block, mtd->erasesize);
                        if (retry_count++ < 10)
                                continue;
 
-                       return ret;
+                       goto out;
                }
 
                ops->retlen += cur_ops.retlen;
@@ -541,7 +544,11 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
                retry_count = 0;
        }
 
-       return ret;
+out:
+       if (ret < 0)
+               return ret;
+
+       return max_bitflips;
 }
 
 static int