Subject: [PATCH] ahci: use pci_alloc_irq_vectors

From: [email-masked] (David Daney)
Date: Mon, 24 Oct 2016 11:57:46 -0700

Hi Christoph,

I can answer these...

On 10/22/2016 07:11 AM, Christoph Hellwig wrote:
> Hi Robert,
>
> is this a controller that's using MSI-X?

Yes.  This is a ThunderX SoC with on-chip AHCI that use MSI-X

>
> If so can you try the patch below?

I applied it to v4.9-rc1 (really commit 
6f33d6458e35d6ba53c2635ee4b8a3177cbd912d), and this didn't seem to make 
it work.

>
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index ba5f11c..5fe852d 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -1617,7 +1617,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>   		/* legacy intx interrupts */
>   		pci_intx(pdev, 1);
>   	}
> -	hpriv->irq = pdev->irq;
> +	hpriv->irq = pci_irq_vector(pdev, 0);
>
>   	if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
>   		host->flags |= ATA_HOST_PARALLEL_SCAN;
>
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