PCI: xilinx: Don't allocate extra memory for the MSI capture address
A long cargo-culted behaviour of PCI drivers is to allocate memory to obtain an address that is fed to the controller as the MSI capture address (i.e. the MSI doorbell). But there is no actual requirement for this address to be RAM. All it needs to be is a suitable aligned address that will *not* be DMA'd to. Use the physical address of the 'port' data structure as the MSI capture address, aligned on a 4K boundary. Link: https://lore.kernel.org/r/20210330151145.997953-5-maz@kernel.org Tested-by:Bharat Kumar Gogada <bharatku@xilinx.com> Signed-off-by:
Marc Zyngier <maz@kernel.org> Signed-off-by:
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent
83ed8d4f
Please register or sign in to comment