Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

Pull random subsystem patches from Ted Ts'o:
 "This patch series contains a major revamp of how we collect entropy
  from interrupts for /dev/random and /dev/urandom.

  The goal is to addresses weaknesses discussed in the paper "Mining
  your Ps and Qs: Detection of Widespread Weak Keys in Network Devices",
  by Nadia Heninger, Zakir Durumeric, Eric Wustrow, J.  Alex Halderman,
  which will be published in the Proceedings of the 21st Usenix Security
  Symposium, August 2012.  (See https://factorable.net for more
  information and an extended version of the paper.)"

Fix up trivial conflicts due to nearby changes in
drivers/{mfd/ab3100-core.c, usb/gadget/omap_udc.c}

* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: (33 commits)
  random: mix in architectural randomness in extract_buf()
  dmi: Feed DMI table to /dev/random driver
  random: Add comment to random_initialize()
  random: final removal of IRQF_SAMPLE_RANDOM
  um: remove IRQF_SAMPLE_RANDOM which is now a no-op
  sparc/ldc: remove IRQF_SAMPLE_RANDOM which is now a no-op
  [ARM] pxa: remove IRQF_SAMPLE_RANDOM which is now a no-op
  board-palmz71: remove IRQF_SAMPLE_RANDOM which is now a no-op
  isp1301_omap: remove IRQF_SAMPLE_RANDOM which is now a no-op
  pxa25x_udc: remove IRQF_SAMPLE_RANDOM which is now a no-op
  omap_udc: remove IRQF_SAMPLE_RANDOM which is now a no-op
  goku_udc: remove IRQF_SAMPLE_RANDOM which was commented out
  uartlite: remove IRQF_SAMPLE_RANDOM which is now a no-op
  drivers: hv: remove IRQF_SAMPLE_RANDOM which is now a no-op
  xen-blkfront: remove IRQF_SAMPLE_RANDOM which is now a no-op
  n2_crypto: remove IRQF_SAMPLE_RANDOM which is now a no-op
  pda_power: remove IRQF_SAMPLE_RANDOM which is now a no-op
  i2c-pmcmsp: remove IRQF_SAMPLE_RANDOM which is now a no-op
  input/serio/hp_sdc.c: remove IRQF_SAMPLE_RANDOM which is now a no-op
  mfd: remove IRQF_SAMPLE_RANDOM which is now a no-op
  ...

4 files changed, 14 insertions, 10 deletions

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 821126eb817..128a804c42f 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -25,6 +25,7 @@
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 #include <linux/freezer.h>
+#include <linux/random.h>
 
 #include <asm/uaccess.h>
 #include <asm/byteorder.h>
@@ -2181,6 +2182,14 @@ int usb_new_device(struct usb_device *udev)
 	/* Tell the world! */
 	announce_device(udev);
 
+	if (udev->serial)
+		add_device_randomness(udev->serial, strlen(udev->serial));
+	if (udev->product)
+		add_device_randomness(udev->product, strlen(udev->product));
+	if (udev->manufacturer)
+		add_device_randomness(udev->manufacturer,
+				      strlen(udev->manufacturer));
+
 	device_enable_async_suspend(&udev->dev);
 
 	/*
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index 3d28fb976c7..9fd7886cfa9 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1836,7 +1836,7 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	/* init to known state, then setup irqs */
 	udc_reset(dev);
 	udc_reinit (dev);
-	if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/,
+	if (request_irq(pdev->irq, goku_irq, IRQF_SHARED,
 			driver_name, dev) != 0) {
 		DBG(dev, "request interrupt %d failed\n", pdev->irq);
 		retval = -EBUSY;
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index 53c093b941e..907ad3ecb34 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -2201,19 +2201,15 @@ static int __init pxa25x_udc_probe(struct platform_device *pdev)
 
 #ifdef CONFIG_ARCH_LUBBOCK
 	if (machine_is_lubbock()) {
-		retval = request_irq(LUBBOCK_USB_DISC_IRQ,
-				lubbock_vbus_irq,
-				IRQF_SAMPLE_RANDOM,
-				driver_name, dev);
+		retval = request_irq(LUBBOCK_USB_DISC_IRQ, lubbock_vbus_irq,
+				     0, driver_name, dev);
 		if (retval != 0) {
 			pr_err("%s: can't get irq %i, err %d\n",
 				driver_name, LUBBOCK_USB_DISC_IRQ, retval);
 			goto err_irq_lub;
 		}
-		retval = request_irq(LUBBOCK_USB_IRQ,
-				lubbock_vbus_irq,
-				IRQF_SAMPLE_RANDOM,
-				driver_name, dev);
+		retval = request_irq(LUBBOCK_USB_IRQ, lubbock_vbus_irq,
+				     0, driver_name, dev);
 		if (retval != 0) {
 			pr_err("%s: can't get irq %i, err %d\n",
 				driver_name, LUBBOCK_USB_IRQ, retval);
diff --git a/drivers/usb/otg/isp1301_omap.c b/drivers/usb/otg/isp1301_omap.c
index 575fc815c93..7a88667742b 100644
--- a/drivers/usb/otg/isp1301_omap.c
+++ b/drivers/usb/otg/isp1301_omap.c
@@ -1576,7 +1576,6 @@ isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 		isp->irq_type = IRQF_TRIGGER_FALLING;
 	}
 
-	isp->irq_type |= IRQF_SAMPLE_RANDOM;
 	status = request_irq(i2c->irq, isp1301_irq,
 			isp->irq_type, DRIVER_NAME, isp);
 	if (status < 0) {