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

[Joe Perches <joe@perches.com>]

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:

		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)) {