[PATCH v12 05/11] genirq/msi: msi_doorbell_calc_pages

msi_doorbell_calc_pages() sum up the number of iommu pages of a given order requested to map all the registered doorbells. This function will allow to dimension the intermediate physical address (IPA) aperture requested to map the MSI doorbells. Signed-off-by: Eric Auger

[PATCH v12 05/11] genirq/msi: msi_doorbell_calc_pages

msi_doorbell_calc_pages() sum up the number of iommu pages of a given order requested to map all the registered doorbells. This function will allow to dimension the intermediate physical address (IPA) aperture requested to map the MSI doorbells. Signed-off-by: Eric Auger --- v11 -> v12: - fix