linux-kernel - Re: [PATCH 2/9] virtio_pci: use shared interrupts for virtqueues

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Message-ID: <da34883b-1069-2cfc-aaa3-6aaf3ee0ebf2@redhat.com>
Date:   Fri, 3 Feb 2017 15:54:54 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Christoph Hellwig <hch@....de>, mst@...hat.com
Cc:     axboe@...nel.dk, pbonzini@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/9] virtio_pci: use shared interrupts for virtqueues



On 2017年01月27日 16:16, Christoph Hellwig wrote:
> +		snprintf(vp_dev->msix_names[i + 1],
> +			 sizeof(*vp_dev->msix_names), "%s-%s",
>   			 dev_name(&vp_dev->vdev.dev), names[i]);
>   		err = request_irq(pci_irq_vector(vp_dev->pci_dev, msix_vec),
> -				  vring_interrupt, 0,
> -				  vp_dev->msix_names[msix_vec],
> -				  vqs[i]);
> +				  vring_interrupt, IRQF_SHARED,
> +				  vp_dev->msix_names[i + 1], vqs[i]);

Do we need to check per_vq_vectors before dereferencing msix_names[i + 1] ?

Thanks