linux-kernel - Re: [PATCH 2/5] pci: switch msix_program_entries to use pci_msix_desc

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Date:	Tue, 12 Jul 2016 14:59:13 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Christoph Hellwig <hch@....de>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] pci: switch msix_program_entries to use
 pci_msix_desc_addr

On Tue, Jul 12, 2016 at 06:20:15PM +0900, Christoph Hellwig wrote:
> Instead of relying on the msix_entry structure for the vector number read
> it from the msi_desc.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  drivers/pci/msi.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index 0d94fbf..a385f39 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -713,11 +713,9 @@ static void msix_program_entries(struct pci_dev *dev,
>  	int i = 0;
>  
>  	for_each_pci_msi_entry(entry, dev) {
> -		int offset = entries[i].entry * PCI_MSIX_ENTRY_SIZE +
> -						PCI_MSIX_ENTRY_VECTOR_CTRL;
> -
>  		entries[i].vector = entry->irq;
> -		entry->masked = readl(entry->mask_base + offset);
> +		entry->masked = readl(pci_msix_desc_addr(entry) +
> +				PCI_MSIX_ENTRY_VECTOR_CTRL);
>  		msix_mask_irq(entry, 1);
>  		i++;
>  	}
> -- 
> 2.1.4
> 
Reviewed-by: Alexander Gordeev <agordeev@...hat.com>