Subject: Re: [PATCH v4 04/10] powerpc/8xx: Use a larger CPM1 command check mask

From: Michael Ellerman <[email-masked]>
Date: Thu, 26 Jan 2023 20:59:03 +1100

Herve Codina <[email-masked]> writes:
> The CPM1 command mask is defined for use with the standard
> CPM1 command register as described in the user's manual:
>   0  |1        3|4    7|8   11|12      14| 15|
>   RST|    -     |OPCODE|CH_NUM|     -    |FLG|
>
> In the QMC extension the CPM1 command register is redefined
> (QMC supplement user's manuel) with the following mapping:
>   0  |1        3|4    7|8           13|14| 15|
>   RST|QMC OPCODE|  1110|CHANNEL_NUMBER| -|FLG|
>
> Extend the check command mask in order to support both the
> standard CH_NUM field and the QMC extension CHANNEL_NUMBER
> field.
>
> Signed-off-by: Herve Codina <[email-masked]>
> Acked-by: Christophe Leroy <[email-masked]>
> ---
>  arch/powerpc/platforms/8xx/cpm1.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Michael Ellerman <[email-masked]> (powerpc)

cheers

> diff --git a/arch/powerpc/platforms/8xx/cpm1.c b/arch/powerpc/platforms/8xx/cpm1.c
> index 8ef1f4392086..6b828b9f90d9 100644
> --- a/arch/powerpc/platforms/8xx/cpm1.c
> +++ b/arch/powerpc/platforms/8xx/cpm1.c
> @@ -100,7 +100,7 @@ int cpm_command(u32 command, u8 opcode)
>  	int i, ret;
>  	unsigned long flags;
>  
> -	if (command & 0xffffff0f)
> +	if (command & 0xffffff03)
>  		return -EINVAL;
>  
>  	spin_lock_irqsave(&cmd_lock, flags);
> -- 
> 2.39.0