[U-Boot] [PATCH] arm: socfpga: Fix mailbox command length checking

[Marek Vasut]

On 4/11/19 9:39 AM, Ley Foon Tan wrote:
> A mailbox command including header + arguments.
> But, "len" only including length of arguments, it missed the length
> of header in checking.
> Includes length of header (1) when checking the space size.

I think the commit message could use some improvement, maybe reword it
so it's clear what you're fixing here. I guess it's some off-by-one error ?

> Signed-off-by: Ley Foon Tan <ley.foon.tan at intel.com>
> Signed-off-by: Chee Hong Ang <chee.hong.ang at intel.com>
> ---
>  arch/arm/mach-socfpga/mailbox_s10.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-socfpga/mailbox_s10.c b/arch/arm/mach-socfpga/mailbox_s10.c
> index 3c33223936..8363c93e90 100644
> --- a/arch/arm/mach-socfpga/mailbox_s10.c
> +++ b/arch/arm/mach-socfpga/mailbox_s10.c
> @@ -59,7 +59,7 @@ static __always_inline int mbox_fill_cmd_circular_buff(u32 header, u32 len,
>  	 */
>  	if (((cin + 1) % MBOX_CMD_BUFFER_SIZE) == cout ||
>  	    ((MBOX_CMD_BUFFER_SIZE - cin + cout - 1) %
> -	     MBOX_CMD_BUFFER_SIZE) < len)
> +	     MBOX_CMD_BUFFER_SIZE) < (len + 1))
>  		return -ENOMEM;
>  
>  	/* write header to circular buffer */
> 


-- 
Best regards,
Marek Vasut