Re: [PATCH 2/5] xhci: Use pci_enable_msix_exact() instead of pci_enable_msix()

[Greg KH]

On Tue, Apr 22, 2014 at 03:22:59PM +0300, Mathias Nyman wrote:
> From: Alexander Gordeev <agordeev@xxxxxxxxxx>
> 
> As result of deprecation of MSI-X/MSI enablement functions
> pci_enable_msix() and pci_enable_msi_block() all drivers
> using these two interfaces need to be updated to use the
> new pci_enable_msi_range()  or pci_enable_msi_exact()
> and pci_enable_msix_range() or pci_enable_msix_exact()
> interfaces.
> 
> Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
> Cc: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-usb@xxxxxxxxxxxxxxx
> Cc: linux-pci@xxxxxxxxxxxxxxx
> Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> ---
>  drivers/usb/host/xhci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index 988ed5f..b0b8399 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -291,7 +291,7 @@ static int xhci_setup_msix(struct xhci_hcd *xhci)
>  		xhci->msix_entries[i].vector = 0;
>  	}
>  
> -	ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count);
> +	ret = pci_enable_msix_exact(pdev, xhci->msix_entries, xhci->msix_count);

Why is this change needed for 3.15-final?

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