4 files changed, 51 insertions, 2 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index cf57d7de3765..9f79dd6d51ab 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -19,6 +19,7 @@
 #include <asm/dma.h>    /* isa_dma_bridge_buggy */
 #include "pci.h"
 
+unsigned int pci_pm_d3_delay = 10;
 
 /**
  * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
@@ -313,6 +314,14 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         } else if (dev->current_state == state)
                 return 0;        /* we're already there */
 
+        /*
+         * If the device or the parent bridge can't support PCI PM, ignore
+         * the request if we're doing anything besides putting it into D0
+         * (which would only happen on boot).
+         */
+        if ((state == PCI_D1 || state == PCI_D2) && pci_no_d1d2(dev))
+                return 0;
+
         /* find PCI PM capability in list */
         pm = pci_find_capability(dev, PCI_CAP_ID_PM);
         
@@ -363,7 +372,7 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         /* Mandatory power management transition delays */
         /* see PCI PM 1.1 5.6.1 table 18 */
         if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
-                msleep(10);
+                msleep(pci_pm_d3_delay);
         else if (state == PCI_D2 || dev->current_state == PCI_D2)
                 udelay(200);
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 9cc842b666eb..08d58fc78ee1 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -47,7 +47,7 @@ extern int pci_msi_quirk;
 #else
 #define pci_msi_quirk 0
 #endif
-
+extern unsigned int pci_pm_d3_delay;
 #ifdef CONFIG_PCI_MSI
 void disable_msi_mode(struct pci_dev *dev, int pos, int type);
 void pci_no_msi(void);
@@ -66,7 +66,15 @@ static inline int pci_save_msix_state(struct pci_dev *dev) { return 0; }
 static inline void pci_restore_msi_state(struct pci_dev *dev) {}
 static inline void pci_restore_msix_state(struct pci_dev *dev) {}
 #endif
+static inline int pci_no_d1d2(struct pci_dev *dev)
+{
+        unsigned int parent_dstates = 0;
 
+        if (dev->bus->self)
+                parent_dstates = dev->bus->self->no_d1d2;
+        return (dev->no_d1d2 || parent_dstates);
+
+}
 extern int pcie_mch_quirk;
 extern struct device_attribute pci_dev_attrs[];
 extern struct class_device_attribute class_device_attr_cpuaffinity;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 53a887e1014c..e3c78c39b7e4 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1418,6 +1418,37 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_0,	quirk_pc
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_PXH_1,      quirk_pcie_pxh);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_PXHV,       quirk_pcie_pxh);
 
+/*
+ * Some Intel PCI Express chipsets have trouble with downstream
+ * device power management.
+ */
+static void quirk_intel_pcie_pm(struct pci_dev * dev)
+{
+        pci_pm_d3_delay = 120;
+        dev->no_d1d2 = 1;
+}
+
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25e2, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25e3, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25e4, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25e5, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25e6, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25e7, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25f7, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25f8, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25f9, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x25fa, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2601, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2602, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2603, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2604, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2605, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2606, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2607, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2608, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x2609, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x260a, quirk_intel_pcie_pm);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    0x260b, quirk_intel_pcie_pm);
 
 /*
  * Fixup the cardbus bridges on the IBM Dock II docking station
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 983fca251b25..8565b81d7fbc 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -161,6 +161,7 @@ struct pci_dev {
         unsigned int    is_enabled:1;   /* pci_enable_device has been called */
         unsigned int    is_busmaster:1; /* device is busmaster */
         unsigned int    no_msi:1;       /* device may not use msi */
+        unsigned int    no_d1d2:1;   /* only allow d0 or d3 */
         unsigned int    block_ucfg_access:1;    /* userspace config space access is blocked */
         unsigned int    broken_parity_status:1; /* Device generates false positive parity */
         unsigned int    msi_enabled:1;