[PATCH v4 3/3] mtd: rawnand: qcom: Fix read len for onfi param page

[Md Sadre Alam]

The minimum size to fetch the data from device to QPIC buffer
is 512-bytes. If size is less than 512-bytes the data will not be
protected by ECC as per QPIC standard. So while reading onfi parameter
page from NAND device set nandc->buf_count = 512.

Cc: stable at vger.kernel.org
Fixes: 89550beb098e ("mtd: rawnand: qcom: Implement exec_op()")
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Tested-by: Lakshmi Sowjanya D <quic_laksd at quicinc.com>
Signed-off-by: Md Sadre Alam <quic_mdalam at quicinc.com>
---
Change in [v4]

* Added Reviewed-by tag

Change in [v3]

* No change

Change in [v2]

* Set buf_count to 512 in the parameter page read

Change in [v1]

 drivers/mtd/nand/raw/qcom_nandc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index a73bb154353f..1003cf118c01 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -1930,7 +1930,7 @@ static int qcom_param_page_type_exec(struct nand_chip *chip,  const struct nand_
 		qcom_write_reg_dma(nandc, &nandc->regs->cmd1, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
 	}
 
-	nandc->buf_count = len;
+	nandc->buf_count = 512;
 	memset(nandc->data_buffer, 0xff, nandc->buf_count);
 
 	config_nand_single_cw_page_read(chip, false, 0);
-- 
2.34.1