linux-kernel - RE: [PATCH] ahci: add a boot option to enable promise ahci

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Date:	Tue, 25 Sep 2012 13:40:23 +0800
From:	Tony Hung - PTT 洪瑞嶸 
	<tony.hung@...promise.com>
To:	Jeff Garzik <jgarzik@...ox.com>
CC:	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] ahci: add a boot option to enable promise ahci

On 2012/9/25 11:05 AM, Jeff Garzik wrote:
>
> On 09/23/2012 10:34 PM, Tony Hung - PTT 洪瑞嶸 wrote:
>
> > linux-3.2.0/drivers/ata/ahci.c: In function 'hptiop_host_request_callback':
>
> > 
>
> > Use min_t(size_t, ...) to fix.

Correct this,
linux-3.2.0/drivers/ata/ahci.c: In function 'ahci_init_one':
Use variable promise_enable to disable RAID PCI controlled by original AHCI.
>
> > 
>
> > Signed-off-by: Tony Hung <tony.hung@...promise.com>
>
> > ---
>
> > 
>
> > diff --git a/linux-3.2.0/drivers/ata/ahci.c b/linux-3.2.0/drivers/ata/ahci.c
>
> > --- a/linux-3.2.0/drivers/ata/ahci.c    2012-08-29 13:40:26.046851693 +0800
>
> > +++ b/linux-3.2.0/drivers/ata/ahci.c  2012-08-30 17:23:10.207838960 +0800
>
> > @@ -430,6 +430,9 @@ static int marvell_enable = 1;
>
> >   module_param(marvell_enable, int, 0644);
>
> >   MODULE_PARM_DESC(marvell_enable, "Marvell SATA via AHCI (1 =
>
> > enabled)");
>
> > 
>
> > +static int promise_enable;
>
> > +module_param(promise_enable, int, 0644);
>
> > +MODULE_PARM_DESC(promise_enable, "Promise SATA via AHCI (1 =
>
> > +enabled)");
>
> > 
>
> >   static void ahci_pci_save_initial_config(struct pci_dev *pdev,
>
> >                                                struct ahci_host_priv *hpriv)
>
> > @@ -1049,6 +1052,16 @@ static int ahci_init_one(struct pci_dev
>
> >            if (pdev->vendor == PCI_VENDOR_ID_MARVELL && !marvell_enable)
>
> >                    return -ENODEV;
>
> > 
>
> > +        /*
>
> > +         * In RAID mode, Promise software RAID need to replace
>
> > +         * original AHCI module, but if AHCI driver build-in kernel,
>
> > +         * Promise AHCI module need a boot option to disable it
>
> > +         */
>
> > +        if (promise_enable &&
>
> > +            ((pdev->class >> 8) == PCI_CLASS_STORAGE_RAID) &&
>
> > +             (pdev->vendor == PCI_VENDOR_ID_ATI ||
>
> > +              pdev->vendor == PCI_VENDOR_ID_AMD))
>
> > +                return -ENODEV;
>
>  
>
> We need the patch for the Promise Software RAID driver, to accept this...
>
>  
>
>          Jeff 

Patch file is in attachment, and sorry for error descript.

Best wishes,
Tony Hung

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