Re: [PATCH] accel/amdxdna: Clear mailbox interrupt register during channel creation

["Falkowski, Maciej" <maciej.falkowski@linux.intel.com>]

Reviewed-by: Maciej Falkowski <maciej.falkowski@linux.intel.com>

On 11/7/2025 7:11 PM, Lizhi Hou wrote:
> The mailbox interrupt register is not always cleared when a mailbox channel
> is created. This can leave stale interrupt states from previous operations.
>
> Fix this by explicitly clearing the interrupt register in the mailbox
> channel creation function.
>
> Fixes: b87f920b9344 ("accel/amdxdna: Support hardware mailbox")
> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
> ---
>   drivers/accel/amdxdna/amdxdna_mailbox.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/accel/amdxdna/amdxdna_mailbox.c b/drivers/accel/amdxdna/amdxdna_mailbox.c
> index 24258dcc18eb..858df97cd3fb 100644
> --- a/drivers/accel/amdxdna/amdxdna_mailbox.c
> +++ b/drivers/accel/amdxdna/amdxdna_mailbox.c
> @@ -516,6 +516,7 @@ xdna_mailbox_create_channel(struct mailbox *mb,
>   	}
>   
>   	mb_chann->bad_state = false;
> +	mailbox_reg_write(mb_chann, mb_chann->iohub_int_addr, 0);
>   
>   	MB_DBG(mb_chann, "Mailbox channel created (irq: %d)", mb_chann->msix_irq);
>   	return mb_chann;