Re: [patch 18/30] PCI: xilinx-nwl: Use irq_data_get_irq_chip_data()

[Rob Herring <robh@xxxxxxxxxx>]

On Thu, Dec 10, 2020 at 1:42 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
>
> Going through a full irq descriptor lookup instead of just using the proper
> helper function which provides direct access is suboptimal.
>
> In fact it _is_ wrong because the chip callback needs to get the chip data
> which is relevant for the chip while using the irq descriptor variant
> returns the irq chip data of the top level chip of a hierarchy. It does not
> matter in this case because the chip is the top level chip, but that
> doesn't make it more correct.
>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>
> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Cc: Michal Simek <michal.simek@xxxxxxxxxx>
> Cc: linux-pci@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> ---
>  drivers/pci/controller/pcie-xilinx-nwl.c |    8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)

Reviewed-by: Rob Herring <robh@xxxxxxxxxx>