linux-kernel - Re: [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support

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Message-ID: <CAK=zhgrvTVoy8zvu21U00NQV53LSiK8HRMTFAarRHJLXqRJRiw@mail.gmail.com>
Date:	Tue, 12 Aug 2014 15:21:13 +0530
From:	Sreekanth Reddy <sreekanth.reddy@...gotech.com>
To:	Joe Perches <joe@...ches.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>, jejb@...nel.org,
	linux-scsi@...r.kernel.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Sathya Prakash <Sathya.Prakash@...gotech.com>,
	Nagalakshmi Nandigama <Nagalakshmi.Nandigama@...gotech.com>,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@...radead.org>
Subject: Re: [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post
 Queue (RDPQ) Array support

On Tue, Aug 12, 2014 at 3:07 PM, Joe Perches <joe@...ches.com> wrote:
> On Tue, 2014-08-12 at 14:54 +0530, Sreekanth Reddy wrote:
>> So, the proposal is to allocate memory independently for each
>> Reply Queue and pass down all of the addresses to the firmware.
>> Then the firmware will just take each address and program the value
>> into the correct register.
>
> trivial note:
>
>> diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
> []
>> @@ -1179,17 +1184,22 @@ static int
>>  _base_config_dma_addressing(struct MPT2SAS_ADAPTER *ioc, struct pci_dev *pdev)
>>  {
>>       struct sysinfo s;
>> -     char *desc = NULL;
>> +     u64 consistent_dma_mask;
>> +
>> +     if (dma_mask)
>> +             consistent_dma_mask = DMA_BIT_MASK(64);
>> +     else
>> +             consistent_dma_mask = DMA_BIT_MASK(32);
>>
>>       if (sizeof(dma_addr_t) > 4) {
>>               const uint64_t required_mask =
>>                   dma_get_required_mask(&pdev->dev);
>>               if ((required_mask > DMA_BIT_MASK(32)) && !pci_set_dma_mask(pdev,
>>                   DMA_BIT_MASK(64)) && !pci_set_consistent_dma_mask(pdev,
>> -                 DMA_BIT_MASK(64))) {
>> +                 consistent_dma_mask)) {
>
> This would be easier to read if the embedded functions
> within the if were on separate lines like:

Accepted. next time onwards I will take care of this.

>
>                 if ((required_mask > DMA_BIT_MASK(32)) &&
>                     !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
>                     !pci_set_consistent_dma_mask(pdev, consistent_dma_mask)) {
>
>
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