linux-kernel - [PATCH v3 08/11] PCI: layerscape: Modify the MSIX to the doorbell mode

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Message-Id: <20190902031716.43195-9-xiaowei.bao@nxp.com>
Date:   Mon,  2 Sep 2019 11:17:13 +0800
From:   Xiaowei Bao <xiaowei.bao@....com>
To:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        leoyang.li@....com, kishon@...com, lorenzo.pieralisi@....com,
        minghuan.Lian@....com, mingkai.hu@....com, roy.zang@....com,
        jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org
Cc:     arnd@...db.de, gregkh@...uxfoundation.org, zhiqiang.hou@....com,
        Xiaowei Bao <xiaowei.bao@....com>
Subject: [PATCH v3 08/11] PCI: layerscape: Modify the MSIX to the doorbell mode

dw_pcie_ep_raise_msix_irq was never called in the exisitng driver
before, because the ls1046a platform don't support the MSIX feature
and msix_capable was always set to false.
Now that add the ls1088a platform with MSIX support, but the existing
dw_pcie_ep_raise_msix_irq doesn't work, so use the doorbell method to
support the MSIX feature.

Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
---
v2: 
 - No change
v3:
 - Modify the commit message make it clearly.

 drivers/pci/controller/dwc/pci-layerscape-ep.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index 1e07287..5f0cb99 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -79,7 +79,8 @@ static int ls_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
 	case PCI_EPC_IRQ_MSI:
 		return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
 	case PCI_EPC_IRQ_MSIX:
-		return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
+		return dw_pcie_ep_raise_msix_irq_doorbell(ep, func_no,
+							  interrupt_num);
 	default:
 		dev_err(pci->dev, "UNKNOWN IRQ type\n");
 		return -EINVAL;
-- 
2.9.5