parse_read_errors can be called with only oob buf also in which
case data_buf will be NULL.  If data_buf is NULL, then don’t
treat this page as completely erased in case of ECC uncorrectable
error.

Signed-off-by: Abhishek Sahu <abs...@codeaurora.org>
---
 drivers/mtd/nand/qcom_nandc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c
index 57c16a6..0ebcc55 100644
--- a/drivers/mtd/nand/qcom_nandc.c
+++ b/drivers/mtd/nand/qcom_nandc.c
@@ -1607,9 +1607,11 @@ static int parse_read_errors(struct qcom_nand_host 
*host, u8 *data_buf,
                        if (host->bch_enabled) {
                                erased = (erased_cw & ERASED_CW) == ERASED_CW ?
                                         true : false;
-                       } else {
+                       } else if (data_buf) {
                                erased = erased_chunk_check_and_fixup(data_buf,
                                                                      data_len);
+                       } else {
+                               erased = false;
                        }
 
                        if (erased) {
@@ -1652,7 +1654,8 @@ static int parse_read_errors(struct qcom_nand_host *host, 
u8 *data_buf,
                        max_bitflips = max(max_bitflips, stat);
                }
 
-               data_buf += data_len;
+               if (data_buf)
+                       data_buf += data_len;
                if (oob_buf)
                        oob_buf += oob_len + ecc->bytes;
        }
-- 
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