Re: [PATCH v2] mtd: rawnand: marvell: check for RDY bits after enabling the IRQ

[Boris Brezillon <boris.brezillon@xxxxxxxxxxx>]

Hi Daniel,

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?

Thanks,

Boris

--->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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