linux-kernel - Re: [PATCH] pata_via: add via

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Message-ID: <4E96FF2C.5070101@mvista.com>
Date:	Thu, 13 Oct 2011 19:09:32 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
CC:	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pata_via: add via_fixup()

Hello.

On 10/13/2011 04:54 PM, Bartlomiej Zolnierkiewicz wrote:

>> On 13-10-2011 15:10, Bartlomiej Zolnierkiewicz wrote:

>>> From: Bartlomiej Zolnierkiewicz<bzolnier@...il.com>
>>> Subject: [PATCH] pata_via: add via_fixup()

>>> Factor out common code from via_[re]init_one() to via_fixup().

>>> Signed-off-by: Bartlomiej Zolnierkiewicz<bzolnier@...il.com>
>>> ---
>>> earlier references:
>>> https://lkml.org/lkml/2009/11/25/381

>>>    drivers/ata/pata_via.c |   49 +++++++++++++++++++++++--------------------------
>>>    1 file changed, 23 insertions(+), 26 deletions(-)

>>> Index: b/drivers/ata/pata_via.c
>>> ===================================================================
>>> --- a/drivers/ata/pata_via.c
>>> +++ b/drivers/ata/pata_via.c
>>> @@ -491,6 +491,27 @@ static void via_config_fifo(struct pci_d
>>>    	}
>>>    }
>>>
>>> +static void via_fixup(struct pci_dev *pdev, const struct via_isa_bridge *config)
>>> +{
>>> +	u32 timing;
>>> +
>>> +	/* Initialise the FIFO for the enabled channels. */
>>> +	via_config_fifo(pdev, config->flags);
>>> +
>>> +	if (config->udma_mask == ATA_UDMA4) {
>>> +		/* The 66 MHz devices require we enable the clock */
>>> +		pci_read_config_dword(pdev, 0x50,&timing);
>>> +		timing |= 0x80008;
>>> +		pci_write_config_dword(pdev, 0x50, timing);
>>> +	}

>>      Hm, via_init_one() doesn't do this now... but used to do this before your
>> patch:

>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=460f5318460a9a3b2562d8055b9fb1c60b768e1f

>>      Was that patch wrong or am I misundertanding?

> It seems that the previous patch was wrong and I haven't noticed it earlier
> because both patches were in my patch queue.

> From: Bartlomiej Zolnierkiewicz<bzolnier@...il.com>
> Subject: [PATCH v2] pata_via: add via_fixup()

> * Fix via_init_one() to enable clock on 66 MHz devices
>    (bug introduced in commit 460f531 "pata_via: store UDMA masks
>     in via_isa_bridges table").

> * Factor out common code from via_[re]init_one() to via_fixup().

> Signed-off-by: Bartlomiej Zolnierkiewicz<bzolnier@...il.com>

    OK, but don't you think the fix should be separate from refactor (and be 
applied to -stable)?

WBR, Sergei
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