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If the host which makes use of IP's integrated MSI Receiver losts power during suspend, we need to reinit the RC and MSI Receiver in resume. But after we move dw_pcie_msi_init() into the core, we have no API to do so. Usually the dwc users need to call dw_pcie_setup_rc() to reinit the RC, we can solve this problem by moving dw_pcie_msi_init() to dw_pcie_setup_rc(). Link: https://lore.kernel.org/r/20210325152604.6e79deba@xhacker.debian Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org>