linux-kernel - Re: [PATCH 2/5] xhci: Use pci_enable_msix_exact() instead of pci_enable

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Date:	Fri, 25 Apr 2014 13:48:13 +0300
From:	Mathias Nyman <mathias.nyman@...ux.intel.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	linux-usb@...r.kernel.org, sarah.a.sharp@...ux.intel.com,
	linux-kernel@...r.kernel.org,
	Alexander Gordeev <agordeev@...hat.com>,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH 2/5] xhci: Use pci_enable_msix_exact() instead of pci_enable_msix()

On 04/24/2014 10:49 PM, Greg KH wrote:
> On Tue, Apr 22, 2014 at 03:22:59PM +0300, Mathias Nyman wrote:
>> From: Alexander Gordeev <agordeev@...hat.com>
>>
>> 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@...hat.com>
>> Cc: Sarah Sharp <sarah.a.sharp@...ux.intel.com>
>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Cc: linux-usb@...r.kernel.org
>> Cc: linux-pci@...r.kernel.org
>> Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
>> ---
>>   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?
>

Can't remember why I thought this was needed for 3.15
Looks like other subsystems (like PCI) just queued similar MSI changes 
for 3.16.

I'll move it to the patchseries for usb-next

-Mathias
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