Subject: [PATCH v7 1/2] PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled

From: Jisheng Zhang <[email-masked]>
Date: Fri, 9 Oct 2020 15:54:36 +0800

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

Signed-off-by: Jisheng Zhang <[email-masked]>
Reviewed-by: Rob Herring <[email-masked]>
Acked-by: Gustavo Pimentel <[email-masked]>
---
 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 317ff512f8df..d3e9ea11ce9e 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -528,7 +528,7 @@ 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

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