linux-kernel - Re: [PATCH] virtio-mmio: Delete an error message in vm_find

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Date:   Thu, 9 Apr 2020 11:19:20 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Markus Elfring <Markus.Elfring@....de>,
        virtualization@...ts.linux-foundation.org,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Tang Bin <tangbin@...s.chinamobile.com>
Subject: Re: [PATCH] virtio-mmio: Delete an error message in vm_find_vqs()


On 2020/4/6 上午1:19, Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 5 Apr 2020 19:14:10 +0200
>
> The function “platform_get_irq” can log an error already.
> Thus omit a redundant message for the exception handling in the
> calling function.


It looks to me that not all error path of platform_get_irq() were loggd.

And git grep told me there're other users of platform_get_irq() that 
check and log by themselves.

Thanks


>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>   drivers/virtio/virtio_mmio.c | 4 +---
>   1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
> index 97d5725fd9a2..9d16aaffca9d 100644
> --- a/drivers/virtio/virtio_mmio.c
> +++ b/drivers/virtio/virtio_mmio.c
> @@ -466,10 +466,8 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
>   	int irq = platform_get_irq(vm_dev->pdev, 0);
>   	int i, err, queue_idx = 0;
>
> -	if (irq < 0) {
> -		dev_err(&vdev->dev, "Cannot get IRQ resource\n");
> +	if (irq < 0)
>   		return irq;
> -	}
>
>   	err = request_irq(irq, vm_interrupt, IRQF_SHARED,
>   			dev_name(&vdev->dev), vm_dev);
> --
> 2.26.0
>