From f5037baccb5b1efb31ad7cab3ebfd8ac3b94cb8f Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Mon, 9 Jul 2012 11:09:21 -0400
Subject: [PATCH] --- yaml --- r: 311783 b: refs/heads/master c:
 dbf0e4c7257f8d684ec1a3c919853464293de66e h: refs/heads/master i:   311781:
 7fac2255b340d2d128d50dcc51f2b099758e6606   311779:
 fe88de3408e3c6317f1d787c225fdb856b5170b9   311775:
 c785cf4d08c37a2471a43d636d8bb1a231247b69 v: v3

---
 [refs]                         |  2 +-
 trunk/drivers/pci/pci-driver.c | 12 ++++++++++++
 trunk/drivers/pci/pci.c        |  5 -----
 trunk/drivers/pci/quirks.c     | 26 --------------------------
 trunk/include/linux/pci.h      |  2 --
 5 files changed, 13 insertions(+), 34 deletions(-)

diff --git a/[refs] b/[refs]
index 82c50ff0ab5c..18727ca32226 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b086b6b10d9f182cd8d2f0dcfd7fd11edba93fc9
+refs/heads/master: dbf0e4c7257f8d684ec1a3c919853464293de66e
diff --git a/trunk/drivers/pci/pci-driver.c b/trunk/drivers/pci/pci-driver.c
index bf0cee629b60..099f46cd8e87 100644
--- a/trunk/drivers/pci/pci-driver.c
+++ b/trunk/drivers/pci/pci-driver.c
@@ -748,6 +748,18 @@ static int pci_pm_suspend_noirq(struct device *dev)
 
 	pci_pm_set_unknown_state(pci_dev);
 
+	/*
+	 * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's
+	 * PCI COMMAND register isn't 0, the BIOS assumes that the controller
+	 * hasn't been quiesced and tries to turn it off.  If the controller
+	 * is already in D3, this can hang or cause memory corruption.
+	 *
+	 * Since the value of the COMMAND register doesn't matter once the
+	 * device has been suspended, we can safely set it to 0 here.
+	 */
+	if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
+		pci_write_config_word(pci_dev, PCI_COMMAND, 0);
+
 	return 0;
 }
 
diff --git a/trunk/drivers/pci/pci.c b/trunk/drivers/pci/pci.c
index 77cb54a65cde..447e83472c01 100644
--- a/trunk/drivers/pci/pci.c
+++ b/trunk/drivers/pci/pci.c
@@ -1744,11 +1744,6 @@ int pci_prepare_to_sleep(struct pci_dev *dev)
 	if (target_state == PCI_POWER_ERROR)
 		return -EIO;
 
-	/* Some devices mustn't be in D3 during system sleep */
-	if (target_state == PCI_D3hot &&
-			(dev->dev_flags & PCI_DEV_FLAGS_NO_D3_DURING_SLEEP))
-		return 0;
-
 	pci_enable_wake(dev, target_state, device_may_wakeup(&dev->dev));
 
 	error = pci_set_power_state(dev, target_state);
diff --git a/trunk/drivers/pci/quirks.c b/trunk/drivers/pci/quirks.c
index 194b243a2817..2a7521677541 100644
--- a/trunk/drivers/pci/quirks.c
+++ b/trunk/drivers/pci/quirks.c
@@ -2929,32 +2929,6 @@ static void __devinit disable_igfx_irq(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
 
-/*
- * The Intel 6 Series/C200 Series chipset's EHCI controllers on many
- * ASUS motherboards will cause memory corruption or a system crash
- * if they are in D3 while the system is put into S3 sleep.
- */
-static void __devinit asus_ehci_no_d3(struct pci_dev *dev)
-{
-	const char *sys_info;
-	static const char good_Asus_board[] = "P8Z68-V";
-
-	if (dev->dev_flags & PCI_DEV_FLAGS_NO_D3_DURING_SLEEP)
-		return;
-	if (dev->subsystem_vendor != PCI_VENDOR_ID_ASUSTEK)
-		return;
-	sys_info = dmi_get_system_info(DMI_BOARD_NAME);
-	if (sys_info && memcmp(sys_info, good_Asus_board,
-			sizeof(good_Asus_board) - 1) == 0)
-		return;
-
-	dev_info(&dev->dev, "broken D3 during system sleep on ASUS\n");
-	dev->dev_flags |= PCI_DEV_FLAGS_NO_D3_DURING_SLEEP;
-	device_set_wakeup_capable(&dev->dev, false);
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1c26, asus_ehci_no_d3);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1c2d, asus_ehci_no_d3);
-
 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
 			  struct pci_fixup *end)
 {
diff --git a/trunk/include/linux/pci.h b/trunk/include/linux/pci.h
index fefb4e19bf6a..d8c379dba6ad 100644
--- a/trunk/include/linux/pci.h
+++ b/trunk/include/linux/pci.h
@@ -176,8 +176,6 @@ enum pci_dev_flags {
 	PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
 	/* Provide indication device is assigned by a Virtual Machine Manager */
 	PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4,
-	/* Device causes system crash if in D3 during S3 sleep */
-	PCI_DEV_FLAGS_NO_D3_DURING_SLEEP = (__force pci_dev_flags_t) 8,
 };
 
 enum pci_irq_reroute_variant {