Re: [PATCH] PCI: ACPI: Fix ThunderX PEM initialization

From: David Daney
Date: Mon Jan 30 2017 - 12:57:46 EST

On 01/30/2017 08:25 AM, Vadim Lomovtsev wrote:
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".

Since this is fixing new code, there should be no chance to break previously working systems.

Bjorn: If possible, this should be merged for v4.10

Signed-off-by: Vadim Lomovtsev <Vadim.Lomovtsev@xxxxxxxxxxxxxxxxxx>

Acked-by: David Daney <david.daney@xxxxxxxxxx>

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;