Hi Boris,
On 2/10/2018 12:44 AM, Boris Brezillon wrote:
On Thu, 27 Sep 2018 09:17:51 +0200
Daniel Mack <daniel@xxxxxxxxxx> wrote:
At least on PXA3xx platforms, enabling RDY interrupts in the NDCR register
will only cause the IRQ to latch when the RDY lanes are changing, and not
in case they are already asserted.
This means that if the controller finished the command in flight before
marvell_nfc_wait_op() is called, that function will wait for a change in
the bit that can't ever happen as it is already set.
To address this race, check for the RDY bits after the IRQ was enabled,
and complete the completion immediately if the condition is already met.
This fixes a bug that was observed with a NAND chip that holds a UBIFS
parition on which file system stress tests were executed. When
marvell_nfc_wait_op() reports an error, UBI/UBIFS will eventually mount
the filesystem read-only, reporting lots of warnings along the way.
Fixes: 02f26ecf8c77 mtd: nand: add reworked Marvell NAND controller driver
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Daniel Mack <daniel@xxxxxxxxxx>
Can you try to replace your patch by the following one and let me know if
it solves your problem?
Nope, this doesn't fix it. Same problem as before.
Thanks,
Daniel
--->8---
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index e63f714f7639..295a86a5545f 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -1123,7 +1123,7 @@ static int marvell_nfc_hw_ecc_hmg_do_write_page(struct nand_chip *chip,
memcpy(nfc->dma_buf, data_buf, lt->data_bytes);
memcpy(nfc->dma_buf + lt->data_bytes, oob_buf, oob_bytes);
marvell_nfc_xfer_data_dma(nfc, DMA_TO_DEVICE, lt->data_bytes +
- lt->ecc_bytes + lt->spare_bytes);
+ oob_bytes);
} else {
marvell_nfc_xfer_data_out_pio(nfc, data_buf, lt->data_bytes);
marvell_nfc_xfer_data_out_pio(nfc, oob_buf, oob_bytes);
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