Per MPC8572E manual, sec 14.4.3.1.3: "Transfers shorter than a full page,
however, require software to prepare the appropriate ECC in the spare
region"
Need to set NAND_NO_SUBPAGE_WRITE flag. If this is not done, then
generic nand_write_subpage_hwecc() is called instead of driver's
write routine, which results into OOPS dereferencing NULL chip->ecc.hwctl
pointer.
Signed-off-by: Nikita Yushchenko <nyushche...@dev.rtsoft.ru>
---
drivers/mtd/nand/fsl_elbc_nand.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index ec549cd..bb146a0 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -766,6 +766,8 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
if ((in_be32(&lbc->bank[priv->bank].br) & BR_DECC) ==
BR_DECC_CHK_GEN) {
chip->ecc.mode = NAND_ECC_HW;
+ /* hardware can't calculate ECC for subpages */
+ chip->options |= NAND_NO_SUBPAGE_WRITE;
/* put in small page settings and adjust later if needed */
chip->ecc.layout = (priv->fmr & FMR_ECCM) ?
&fsl_elbc_oob_sp_eccm1 : &fsl_elbc_oob_sp_eccm0;
--
1.7.10.4
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