Re: [PATCH v3] mtd: rawnand: Increment IFC_TIMEOUT_MSECS for nand controller response

Miquel Raynal
2023-11-14T08:13:32Z

Hi Ronald,

debug.penguin32@gmail.com wrote on Tue, 14 Nov 2023 03:32:49 +1000:

> Under heavy load it is likely that the controller is done
> with its own task but the thread unlocking the wait is not
> scheduled in time. Increasing IFC_TIMEOUT_MSECS allows the
> controller to respond within allowable timeslice of 1 sec.
>
> fsl,ifc-nand 7e800000.nand: Controller is not responding
>
> [<804b2047>] (nand_get_device) from [<804b5335>] (nand_write_oob+0x1b/0x4a)
> [<804b5335>] (nand_write_oob) from [<804a3585>] (mtd_write+0x41/0x5c)
> [<804a3585>] (mtd_write) from [<804c1d47>] (ubi_io_write+0x17f/0x22c)
> [<804c1d47>] (ubi_io_write) from [<804c047b>] (ubi_eba_write_leb+0x5b/0x1d0)
>
> Cc: stable@vger.kernel.org

I believe the Fixes tag is the latest missing piece?

> Signed-off-by: Ronald Monthero <debug.penguin32@gmail.com>
> ---
> drivers/mtd/nand/raw/fsl_ifc_nand.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/nand/raw/fsl_ifc_nand.c b/drivers/mtd/nand/raw/fsl_ifc_nand.c
> index 20bb1e0cb5eb..f0e2318ce088 100644
> --- a/drivers/mtd/nand/raw/fsl_ifc_nand.c
> +++ b/drivers/mtd/nand/raw/fsl_ifc_nand.c
> @@ -21,7 +21,7 @@
>
> #define ERR_BYTE 0xFF /* Value returned for read
> bytes when read failed */
> -#define IFC_TIMEOUT_MSECS 500 /* Maximum number of mSecs to wait
> +#define IFC_TIMEOUT_MSECS 1000 /* Maximum timeout to wait
> for IFC NAND Machine */
>
> struct fsl_ifc_ctrl;

Thanks,
Miquèl