4 files changed, 30 insertions, 11 deletions

diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 66f411a6e8ea..cabc04383685 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -115,6 +115,11 @@
 #define MEI_DEV_ID_LPT_HR     0x8CBA  /* Lynx Point H Refresh */
 
 #define MEI_DEV_ID_WPT_LP     0x9CBA  /* Wildcat Point LP */
+
+/* Host Firmware Status Registers in PCI Config Space */
+#define PCI_CFG_HFS_1         0x40
+#define PCI_CFG_HFS_2         0x48
+
 /*
  * MEI HW Section
  */
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 29b5af8efb71..4e3cba6da3f5 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -455,8 +455,7 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
 
                 cl->status = 0;
                 list_del(&cb->list);
-                if (MEI_WRITING == cl->writing_state &&
-                    cb->fop_type == MEI_FOP_WRITE &&
+                if (cb->fop_type == MEI_FOP_WRITE &&
                     cl != &dev->iamthif_cl) {
                         cl_dbg(dev, cl, "MEI WRITE COMPLETE\n");
                         cl->writing_state = MEI_WRITE_COMPLETE;
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index b35594dbf52f..147413145c97 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -644,8 +644,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
                 goto out;
         }
 
-        if (MEI_WRITE_COMPLETE == cl->writing_state)
-                mask |= (POLLIN | POLLRDNORM);
+        mask |= (POLLIN | POLLRDNORM);
 
 out:
         mutex_unlock(&dev->device_lock);
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 1c8fd3a3e135..95889e2e31ff 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -97,15 +97,31 @@ static bool mei_me_quirk_probe(struct pci_dev *pdev,
                                 const struct pci_device_id *ent)
 {
         u32 reg;
-        if (ent->device == MEI_DEV_ID_PBG_1) {
-                pci_read_config_dword(pdev, 0x48, &reg);
-                /* make sure that bit 9 is up and bit 10 is down */
-                if ((reg & 0x600) == 0x200) {
-                        dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
-                        return false;
-                }
+        /* Cougar Point || Patsburg */
+        if (ent->device == MEI_DEV_ID_CPT_1 ||
+            ent->device == MEI_DEV_ID_PBG_1) {
+                pci_read_config_dword(pdev, PCI_CFG_HFS_2, &reg);
+                /* make sure that bit 9 (NM) is up and bit 10 (DM) is down */
+                if ((reg & 0x600) == 0x200)
+                        goto no_mei;
         }
+
+        /* Lynx Point */
+        if (ent->device == MEI_DEV_ID_LPT_H  ||
+            ent->device == MEI_DEV_ID_LPT_W  ||
+            ent->device == MEI_DEV_ID_LPT_HR) {
+                /* Read ME FW Status check for SPS Firmware */
+                pci_read_config_dword(pdev, PCI_CFG_HFS_1, &reg);
+                /* if bits [19:16] = 15, running SPS Firmware */
+                if ((reg & 0xf0000) == 0xf0000)
+                        goto no_mei;
+        }
+
         return true;
+
+no_mei:
+        dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
+        return false;
 }
 /**
  * mei_probe - Device Initialization Routine