linux-kernel - Re: [PATCH V2] AHCI: Workaround for ThunderX Errata#22536

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Date:	Sun, 14 Feb 2016 12:01:52 -0500
From:	Tejun Heo <tj@...nel.org>
To:	tchalamarla@...iumnetworks.com
Cc:	stripathi@....com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V2] AHCI: Workaround for ThunderX Errata#22536

Hello,

On Fri, Feb 12, 2016 at 03:20:30PM -0800, tchalamarla@...iumnetworks.com wrote:
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index 546a369..76e310e 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -1560,6 +1560,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>  	if (ahci_broken_devslp(pdev))
>  		hpriv->flags |= AHCI_HFLAG_NO_DEVSLP;
>  
> +	if (pdev->vendor == 0x177d && pdev->device == 0xa01c)
> +		ahci_thunderx_init(&pdev->dev, hpriv);

So, this would make ahci fail to build if thunderx is not configured.
Maybe we should add an additional callback to update hpriv.

>  	/* save initial config */
>  	ahci_pci_save_initial_config(pdev, hpriv);
>  
> diff --git a/drivers/ata/ahci_thunderx.c b/drivers/ata/ahci_thunderx.c

This driver isn't upstream yet, right?  Maybe just fold this change
together?

Thanks.

-- 
tejun