[patch V3 26/35] genirq/msi: Provide interface to retrieve Linux interrupt number

[Jason Gunthorpe]

On Fri, Dec 10, 2021 at 11:19:23PM +0100, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx at linutronix.de>
> 
> This allows drivers to retrieve the Linux interrupt number instead of
> fiddling with MSI descriptors.
> 
> msi_get_virq() returns the Linux interrupt number or 0 in case that there
> is no entry for the given MSI index.
> 
> Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
> Reviewed-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> ---
> V2: Simplify the implementation and let PCI deal with the PCI specialities - Marc
> ---
>  include/linux/msi.h |    2 ++
>  kernel/irq/msi.c    |   36 ++++++++++++++++++++++++++++++++++++
>  2 files changed, 38 insertions(+)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason