linux-kernel - [PATCH] PCI: ACPI: Fix ThunderX PEM initialization

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Date:   Mon, 30 Jan 2017 08:25:52 -0800
From:   Vadim Lomovtsev <Vadim.Lomovtsev@...iumnetworks.com>
To:     <tn@...ihalf.com>, <David.Daney@...ium.com>, <bhelgaas@...gle.com>,
        <linux-pci@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <Vadim.Lomovtsev@...iumnetworks.com>,
        <stemerkhanov@...IUMNETWORKS.onmicrosoft.com>
Subject: [PATCH] PCI: ACPI: Fix ThunderX PEM initialization

This patch is to address PEM initialization issue
which causes network issues.

It is necessary to search for _HID:PNP0A08 while requesting
PEM resources via ACPI instead of "THRX0002".

Signed-off-by: Vadim Lomovtsev <Vadim.Lomovtsev@...iumnetworks.com>
---
 drivers/pci/host/pci-thunder-pem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/host/pci-thunder-pem.c b/drivers/pci/host/pci-thunder-pem.c
index af722eb..aec30b8 100644
--- a/drivers/pci/host/pci-thunder-pem.c
+++ b/drivers/pci/host/pci-thunder-pem.c
@@ -331,7 +331,7 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg)
 	if (!res_pem)
 		return -ENOMEM;
 
-	ret = acpi_get_rc_resources(dev, "THRX0002", root->segment, res_pem);
+	ret = acpi_get_rc_resources(dev, "PNP0A08", root->segment, res_pem);
 	if (ret) {
 		dev_err(dev, "can't get rc base address\n");
 		return ret;
-- 
2.4.11