linux-kernel - Re: [PATCH] [v2] platform/mellanox: Fix mlxbf-tmfifo not handling all virtio CONSOLE notifictions updated to use set

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Date:   Mon, 21 Aug 2023 18:53:28 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Shih-Yi Chen <shihyic@...dia.com>, linux-kernel@...r.kernel.org,
        Mark Gross <markgross@...nel.org>,
        Vadim Pasternak <vadimp@...dia.com>,
        platform-driver-x86@...r.kernel.org
Cc:     Liming Sung <limings@...dia.com>,
        David Thompson <davthompson@...dia.com>
Subject: Re: [PATCH] [v2] platform/mellanox: Fix mlxbf-tmfifo not handling all
 virtio CONSOLE notifictions updated to use set_bit()

Hi,

On 8/21/23 17:06, Shih-Yi Chen wrote:
> From: shihyic <shihyic@...dia.com>
> 
> rshim console does not show all entries of dmesg.
> 
> Fixed by setting MLXBF_TM_TX_LWM_IRQ for every CONSOLE notification.
> 
> Signed-off-by: Shih-Yi Chen <shihyic@...dia.com>
> Reviewed-by: Liming Sung <limings@...dia.com>, David Thompson <davthompson@...dia.com>
> Reviewed-by: David Thompson <davthompson@...dia.com>

Thank you for your patch, I've applied this patch to my fixes
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes

Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.

I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.

Regards,

Hans



> ---
> v1->v2:
>  - Per review comment, replaced test_and_set_bit() with set_bit()
> 
>  drivers/platform/mellanox/mlxbf-tmfifo.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/platform/mellanox/mlxbf-tmfifo.c b/drivers/platform/mellanox/mlxbf-tmfifo.c
> index a79318e90a13..b600b77d91ef 100644
> --- a/drivers/platform/mellanox/mlxbf-tmfifo.c
> +++ b/drivers/platform/mellanox/mlxbf-tmfifo.c
> @@ -887,6 +887,7 @@ static bool mlxbf_tmfifo_virtio_notify(struct virtqueue *vq)
>  			tm_vdev = fifo->vdev[VIRTIO_ID_CONSOLE];
>  			mlxbf_tmfifo_console_output(tm_vdev, vring);
>  			spin_unlock_irqrestore(&fifo->spin_lock[0], flags);
> +			set_bit(MLXBF_TM_TX_LWM_IRQ, &fifo->pend_events);
>  		} else if (test_and_set_bit(MLXBF_TM_TX_LWM_IRQ,
>  					    &fifo->pend_events)) {
>  			return true;