[PATCH v3 1/2] PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled

Jisheng Zhang
2020-09-25T08:39:46Z

If MSI is disabled, there's no need to program PCIE_MSI_INTR0_MASK
and PCIE_MSI_INTR0_ENABLE registers.

Fixes: 7c5925afbc58 ("PCI: dwc: Move MSI IRQs allocation to IRQ domainshierarchical API")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 9dafecba347f..f08f4d97f321 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -632,7 +632,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)

dw_pcie_setup(pci);

- if (!pp->ops->msi_host_init) {
+ if (pci_msi_enabled() && !pp->ops->msi_host_init) {
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;

/* Initialize IRQ Status array */
--
2.28.0