mei: me: disable driver on SPT SPS firmware

commit 8c57cac1457f3125a5d13dc03635c0708c61bff0 upstream.

Sunrise Point PCH with SPS Firmware doesn't expose working
MEI interface, we need to quirk it out.
The SPS Firmware is identifiable only on the first PCI function
of the device.

Tested-by: Sujith Pandel <sujith_pandel@dell.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 25b1997a62cbc38626ffb3b0166efe649aed9e08..36333750c512533d7cee2d1f2dbf648c1efb6940 100644 (file)
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1258,8 +1258,14 @@ static bool mei_me_fw_type_nm(struct pci_dev *pdev)
 static bool mei_me_fw_type_sps(struct pci_dev *pdev)
 {
        u32 reg;
-       /* Read ME FW Status check for SPS Firmware */
-       pci_read_config_dword(pdev, PCI_CFG_HFS_1, &reg);
+       unsigned int devfn;
+
+       /*
+        * Read ME FW Status register to check for SPS Firmware
+        * The SPS FW is only signaled in pci function 0
+        */
+       devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
+       pci_bus_read_config_dword(pdev->bus, devfn, PCI_CFG_HFS_1, &reg);
        /* if bits [19:16] = 15, running SPS Firmware */
        return (reg & 0xf0000) == 0xf0000;
 }

diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 0af3d7d3041951666ac6179d3eff50ed02b4c293..01e20384ac4476b2e97a15233cea73d29849e51f 100644 (file)
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -84,8 +84,8 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
 
        {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, mei_me_pch8_cfg)},
        {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, mei_me_pch8_cfg)},
-       {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, mei_me_pch8_cfg)},
-       {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, mei_me_pch8_cfg)},
+       {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, mei_me_pch8_sps_cfg)},
+       {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, mei_me_pch8_sps_cfg)},
 
        {MEI_PCI_DEVICE(MEI_DEV_ID_KBP, mei_me_pch8_cfg)},
        {MEI_PCI_DEVICE(MEI_DEV_ID_KBP_2, mei_me_pch8_cfg)},