[PATCH] NVMe: Write CC before calling enable.

[Dan McLeran]

Yes, I think I got confused there. This is not necessary.

On Wed, 2 Jul 2014, Matthew Wilcox wrote:

> On Wed, Jul 02, 2014 at 12:33:08PM -0600, Keith Busch wrote:
>> On Tue, 1 Jul 2014, Dan McLeran wrote:
>>> Write the controller configuration register to configure queue sizes,
>>> memory page size, etc. from within nvme_configure_admin_queue before
>>> calling nvme_enable_ctrl.
>>
>> I can see that you're doing that, but why? Is this fixing something?
>
> I think I have created this confusion.  In Dan's earlier patch, this
> writel() was left in.  I took it out as part of merging his patch (as
> Dan himself had done in an earlier version of this patch).  I didn't
> see the point of writing everything but enable, then writing the enable
> bit separately.
>
>>> Signed-off-by: Dan McLeran <daniel.mcleran at intel.com>
>>> ---
>>> drivers/block/nvme-core.c |    1 +
>>> 1 file changed, 1 insertion(+)
>>>
>>> diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
>>> index 28aec2d..58281d2 100644
>>> --- a/drivers/block/nvme-core.c
>>> +++ b/drivers/block/nvme-core.c
>>> @@ -1512,6 +1512,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
>>> 	writel(aqa, &dev->bar->aqa);
>>> 	writeq(nvmeq->sq_dma_addr, &dev->bar->asq);
>>> 	writeq(nvmeq->cq_dma_addr, &dev->bar->acq);
>>> +	writel(dev->ctrl_config, &dev->bar->cc);
>>>
>>> 	result = nvme_enable_ctrl(dev, cap);
>>> 	if (result)
>>> --
>>> 1.7.10.4
>>>
>>>
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>>>
>>
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>