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SubjectRe: [PATCH 10/9] PCI/MSI: Undeprecate pci_enable_msi()
On Fri, Jan 17, 2014 at 10:26:20AM +0100, Alexander Gordeev wrote:
> Signed-off-by: Alexander Gordeev <agordeev@redhat.com>

I applied this to pci/msi, thanks!

> ---
> Documentation/PCI/MSI-HOWTO.txt | 23 ++++++++++++++++++++---
> 1 files changed, 20 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/PCI/MSI-HOWTO.txt b/Documentation/PCI/MSI-HOWTO.txt
> index a8d0100..3c3080e 100644
> --- a/Documentation/PCI/MSI-HOWTO.txt
> +++ b/Documentation/PCI/MSI-HOWTO.txt
> @@ -82,7 +82,19 @@ Most of the hard work is done for the driver in the PCI layer. It simply
> has to request that the PCI layer set up the MSI capability for this
> device.
>
> -4.2.1 pci_enable_msi_range
> +4.2.1 pci_enable_msi
> +
> +int pci_enable_msi(struct pci_dev *dev)
> +
> +A successful call allocates ONE interrupt to the device, regardless
> +of how many MSIs the device supports. The device is switched from
> +pin-based interrupt mode to MSI mode. The dev->irq number is changed
> +to a new number which represents the message signaled interrupt;
> +consequently, this function should be called before the driver calls
> +request_irq(), because an MSI is delivered via a vector that is
> +different from the vector of a pin-based interrupt.
> +
> +4.2.2 pci_enable_msi_range
>
> int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec)
>
> @@ -158,7 +170,12 @@ static int foo_driver_enable_single_msi(struct pci_dev *pdev)
> return pci_enable_msi_range(pdev, 1, 1);
> }
>
> -4.2.2 pci_disable_msi
> +Note, unlike pci_enable_msi() function, which could be also used to
> +enable the single MSI mode, pci_enable_msi_range() returns either a
> +negative errno or 1 (not negative errno or 0 - as pci_enable_msi()
> +does).
> +
> +4.2.3 pci_disable_msi
>
> void pci_disable_msi(struct pci_dev *dev)
>
> @@ -172,7 +189,7 @@ on any interrupt for which it previously called request_irq().
> Failure to do so results in a BUG_ON(), leaving the device with
> MSI enabled and thus leaking its vector.
>
> -4.2.3 pci_msi_vec_count
> +4.2.4 pci_msi_vec_count
>
> int pci_msi_vec_count(struct pci_dev *dev)
>
> --
> 1.7.7.6
>
> --
> Regards,
> Alexander Gordeev
> agordeev@redhat.com
> --
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