ARM: zynq: Fix invalid check on NAND_CMD_NONE.

From: Patrick van Gelder <patrick.vangelder at nl.bosch.com>

The end_cmd field in the variables cmd_phase_addr and data_phase_addr
contains the value 0xFF when the end_cmd equals NAND_CMD_NONE. This
should be 0x00.

This is caused by comparing NAND_CMD_NONE (int) with end_cmd (u8).
end_cmd will be promoted by the int value -1 and therefore is not equal
to 0xFF. Solved by casting NAND_CMD_NONE to u8 which will avoid int
promotion.

Signed-off-by: Patrick van Gelder <patrick.vangelder at nl.bosch.com>
Reviewed-by: T Karthik Reddy <t.karthik.reddy at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

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

p? 24. 4. 2020 v 12:25 odes?latel Michal Simek <michal.simek at xilinx.com> napsal:
>
> From: Patrick van Gelder <patrick.vangelder at nl.bosch.com>
>
> The end_cmd field in the variables cmd_phase_addr and data_phase_addr
> contains the value 0xFF when the end_cmd equals NAND_CMD_NONE. This
> should be 0x00.
>
> This is caused by comparing NAND_CMD_NONE (int) with end_cmd (u8).
> end_cmd will be promoted by the int value -1 and therefore is not equal
> to 0xFF. Solved by casting NAND_CMD_NONE to u8 which will avoid int
> promotion.
>
> Signed-off-by: Patrick van Gelder <patrick.vangelder at nl.bosch.com>
> Reviewed-by: T Karthik Reddy <t.karthik.reddy at xilinx.com>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> ---
>
>  drivers/mtd/nand/raw/zynq_nand.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/nand/raw/zynq_nand.c b/drivers/mtd/nand/raw/zynq_nand.c
> index 0aea83dac0e6..394129741831 100644
> --- a/drivers/mtd/nand/raw/zynq_nand.c
> +++ b/drivers/mtd/nand/raw/zynq_nand.c
> @@ -845,7 +845,7 @@ static void zynq_nand_cmd_function(struct mtd_info *mtd, unsigned int command,
>         if (curr_cmd->end_cmd_valid == ZYNQ_NAND_CMD_PHASE)
>                 end_cmd_valid = 1;
>
> -       if (curr_cmd->end_cmd == NAND_CMD_NONE)
> +       if (curr_cmd->end_cmd == (u8)NAND_CMD_NONE)
>                 end_cmd = 0x0;
>         else
>                 end_cmd = curr_cmd->end_cmd;
> --
> 2.26.2
>

Applied.
M