Re: [PATCH -next v3 RESEND] mtd: rawnand: Propagate error and simplify ternary operators for brcmstb_nand_wait_for_completion()

[William Zhang <william.zhang@broadcom.com>]

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On 08/07/2023 08:29 PM, 'Ruan Jinjie' via BCM-KERNEL-FEEDBACK-LIST,PDL 
wrote:
> As bcmnand_ctrl_poll_status() return negative errno, so return true if
> sts < 0. The < 0 case does not exist for wait_for_completion_timeout(),
> so return true if sts = 0 and zero otherwise. Both of the true return
> of them can be considered as a -ETIMEDOUT err, so return -ETIMEDOUT
> if err is true to propagate err from its caller.
> 
> Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
> ---
> v3:
> - Update the commit title and message.
> - Do not change the return type from bool to int.
> - Return -ETIMEDOUT if err is true.
> v2:
> - Update the commit title and message.
> - Propagate the error instead of upon error.
> ---
>   drivers/mtd/nand/raw/brcmnand/brcmnand.c | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> index 03764b589ec5..440bef477930 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> @@ -1666,13 +1666,13 @@ static bool brcmstb_nand_wait_for_completion(struct nand_chip *chip)
>   		disable_ctrl_irqs(ctrl);
>   		sts = bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY,
>   					       NAND_CTRL_RDY, 0);
> -		err = (sts < 0) ? true : false;
> +		err = sts < 0;
>   	} else {
>   		unsigned long timeo = msecs_to_jiffies(
>   						NAND_POLL_STATUS_TIMEOUT_MS);
>   		/* wait for completion interrupt */
>   		sts = wait_for_completion_timeout(&ctrl->done, timeo);
> -		err = (sts <= 0) ? true : false;
> +		err = !sts;
>   	}
>   
>   	return err;
> @@ -1688,6 +1688,7 @@ static int brcmnand_waitfunc(struct nand_chip *chip)
>   	if (ctrl->cmd_pending)
>   		err = brcmstb_nand_wait_for_completion(chip);
>   
> +	ctrl->cmd_pending = 0;
>   	if (err) {
>   		u32 cmd = brcmnand_read_reg(ctrl, BRCMNAND_CMD_START)
>   					>> brcmnand_cmd_shift(ctrl);
> @@ -1696,8 +1697,8 @@ static int brcmnand_waitfunc(struct nand_chip *chip)
>   			"timeout waiting for command %#02x\n", cmd);
>   		dev_err_ratelimited(ctrl->dev, "intfc status %08x\n",
>   			brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS));
> +		return -ETIMEDOUT;
>   	}
> -	ctrl->cmd_pending = 0;
>   	return brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) &
>   				 INTFC_FLASH_STATUS;
>   }
> 

Reviewed-by: William Zhang <william.zhang@broadcom.com>

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