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USB fixes for 3.16-rc2 

Here are some USB fixes for 3.16-rc2 that resolve some reported issues.
 All of these have been in linux-next for a while with no problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some USB fixes for 3.16-rc2 that resolve some reported
  issues.  All of these have been in linux-next for a while with no
  problems"

* tag 'usb-3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: usbtest: add a timeout for scatter-gather tests
  USB: EHCI: avoid BIOS handover on the HASEE E200
  usb: fix hub-port pm_runtime_enable() vs runtime pm transitions
  usb: quiet peer failure warning, disable poweroff
  usb: improve "not suspended yet" message in hub_suspend()
  xhci: Fix sleeping with IRQs disabled in xhci_stop_device()
  usb: fix ->update_hub_device() vs hdev->maxchild
This commit is contained in:
Linus Torvalds 2014-06-21 06:41:07 -10:00
parent 3c8fb50445 32b36eeae6
commit 564fbee928
6 changed files with 118 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/usb/core/hub.c
View File

@ -1526,18 +1526,6 @@ static int hub_configure(struct usb_hub *hub,
dev_dbg(hub_dev, "%umA bus power budget for each child\n",
hub->mA_per_port);
/* Update the HCD's internal representation of this hub before khubd
* starts getting port status changes for devices under the hub.
*/
if (hcd->driver->update_hub_device) {
ret = hcd->driver->update_hub_device(hcd, hdev,
&hub->tt, GFP_KERNEL);
if (ret < 0) {
message = "can't update HCD hub info";
goto fail;
}
}
ret = hub_hub_status(hub, &hubstatus, &hubchange);
if (ret < 0) {
message = "can't get hub status";
@ -1589,10 +1577,28 @@ static int hub_configure(struct usb_hub *hub,
}
}
hdev->maxchild = i;
for (i = 0; i < hdev->maxchild; i++) {
struct usb_port *port_dev = hub->ports[i];
pm_runtime_put(&port_dev->dev);
}
mutex_unlock(&usb_port_peer_mutex);
if (ret < 0)
goto fail;
/* Update the HCD's internal representation of this hub before khubd
* starts getting port status changes for devices under the hub.
*/
if (hcd->driver->update_hub_device) {
ret = hcd->driver->update_hub_device(hcd, hdev,
&hub->tt, GFP_KERNEL);
if (ret < 0) {
message = "can't update HCD hub info";
goto fail;
}
}
usb_hub_adjust_deviceremovable(hdev, hub->descriptor);
hub_activate(hub, HUB_INIT);
@ -3458,7 +3464,8 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
struct usb_device *udev = port_dev->child;
if (udev && udev->can_submit) {
dev_warn(&port_dev->dev, "not suspended yet\n");
dev_warn(&port_dev->dev, "device %s not suspended yet\n",
dev_name(&udev->dev));
if (PMSG_IS_AUTO(msg))
return -EBUSY;
}

2
drivers/usb/core/hub.h
View File

@ -84,6 +84,7 @@ struct usb_hub {
* @dev: generic device interface
* @port_owner: port's owner
* @peer: related usb2 and usb3 ports (share the same connector)
* @req: default pm qos request for hubs without port power control
* @connect_type: port's connect type
* @location: opaque representation of platform connector location
* @status_lock: synchronize port_event() vs usb_port_{suspend|resume}
@ -95,6 +96,7 @@ struct usb_port {
struct device dev;
struct usb_dev_state *port_owner;
struct usb_port *peer;
struct dev_pm_qos_request *req;
enum usb_port_connect_type connect_type;
usb_port_location_t location;
struct mutex status_lock;

87
drivers/usb/core/port.c
View File

@ -21,6 +21,8 @@
#include "hub.h"
static int usb_port_block_power_off;
static const struct attribute_group *port_dev_group[];
static ssize_t connect_type_show(struct device *dev,
@ -66,6 +68,7 @@ static void usb_port_device_release(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
kfree(port_dev->req);
kfree(port_dev);
}
@ -142,6 +145,9 @@ static int usb_port_runtime_suspend(struct device *dev)
== PM_QOS_FLAGS_ALL)
return -EAGAIN;
if (usb_port_block_power_off)
return -EBUSY;
usb_autopm_get_interface(intf);
retval = usb_hub_set_port_power(hdev, hub, port1, false);
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION);
@ -190,11 +196,19 @@ static int link_peers(struct usb_port *left, struct usb_port *right)
if (left->peer || right->peer) {
struct usb_port *lpeer = left->peer;
struct usb_port *rpeer = right->peer;
char *method;
WARN(1, "failed to peer %s and %s (%s -> %p) (%s -> %p)\n",
dev_name(&left->dev), dev_name(&right->dev),
dev_name(&left->dev), lpeer,
dev_name(&right->dev), rpeer);
if (left->location && left->location == right->location)
method = "location";
else
method = "default";
pr_warn("usb: failed to peer %s and %s by %s (%s:%s) (%s:%s)\n",
dev_name(&left->dev), dev_name(&right->dev), method,
dev_name(&left->dev),
lpeer ? dev_name(&lpeer->dev) : "none",
dev_name(&right->dev),
rpeer ? dev_name(&rpeer->dev) : "none");
return -EBUSY;
}
@ -251,6 +265,7 @@ static void link_peers_report(struct usb_port *left, struct usb_port *right)
dev_warn(&left->dev, "failed to peer to %s (%d)\n",
dev_name(&right->dev), rc);
pr_warn_once("usb: port power management may be unreliable\n");
usb_port_block_power_off = 1;
}
}
@ -386,9 +401,13 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1)
int retval;
port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL);
if (!port_dev) {
retval = -ENOMEM;
goto exit;
if (!port_dev)
return -ENOMEM;
port_dev->req = kzalloc(sizeof(*(port_dev->req)), GFP_KERNEL);
if (!port_dev->req) {
kfree(port_dev);
return -ENOMEM;
}
hub->ports[port1 - 1] = port_dev;
@ -404,31 +423,53 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1)
port1);
mutex_init(&port_dev->status_lock);
retval = device_register(&port_dev->dev);
if (retval)
goto error_register;
if (retval) {
put_device(&port_dev->dev);
return retval;
}
/* Set default policy of port-poweroff disabled. */
retval = dev_pm_qos_add_request(&port_dev->dev, port_dev->req,
DEV_PM_QOS_FLAGS, PM_QOS_FLAG_NO_POWER_OFF);
if (retval < 0) {
device_unregister(&port_dev->dev);
return retval;
}
find_and_link_peer(hub, port1);
/*
* Enable runtime pm and hold a refernce that hub_configure()
* will drop once the PM_QOS_NO_POWER_OFF flag state has been set
* and the hub has been fully registered (hdev->maxchild set).
*/
pm_runtime_set_active(&port_dev->dev);
pm_runtime_get_noresume(&port_dev->dev);
pm_runtime_enable(&port_dev->dev);
device_enable_async_suspend(&port_dev->dev);
/*
* Do not enable port runtime pm if the hub does not support
* power switching. Also, userspace must have final say of
* whether a port is permitted to power-off. Do not enable
* runtime pm if we fail to expose pm_qos_no_power_off.
* Keep hidden the ability to enable port-poweroff if the hub
* does not support power switching.
*/
if (hub_is_port_power_switchable(hub)
&& dev_pm_qos_expose_flags(&port_dev->dev,
PM_QOS_FLAG_NO_POWER_OFF) == 0)
pm_runtime_enable(&port_dev->dev);
if (!hub_is_port_power_switchable(hub))
return 0;
device_enable_async_suspend(&port_dev->dev);
/* Attempt to let userspace take over the policy. */
retval = dev_pm_qos_expose_flags(&port_dev->dev,
PM_QOS_FLAG_NO_POWER_OFF);
if (retval < 0) {
dev_warn(&port_dev->dev, "failed to expose pm_qos_no_poweroff\n");
return 0;
}
/* Userspace owns the policy, drop the kernel 'no_poweroff' request. */
retval = dev_pm_qos_remove_request(port_dev->req);
if (retval >= 0) {
kfree(port_dev->req);
port_dev->req = NULL;
}
return 0;
error_register:
put_device(&port_dev->dev);
exit:
return retval;
}
void usb_hub_remove_port_device(struct usb_hub *hub, int port1)

19
drivers/usb/host/pci-quirks.c
View File

@ -656,6 +656,14 @@ static const struct dmi_system_id ehci_dmi_nohandoff_table[] = {
DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
},
},
{
/* HASEE E200 */
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"),
DMI_MATCH(DMI_BOARD_NAME, "E210"),
DMI_MATCH(DMI_BIOS_VERSION, "6.00"),
},
},
{ }
};
@ -665,9 +673,14 @@ static void ehci_bios_handoff(struct pci_dev *pdev,
{
int try_handoff = 1, tried_handoff = 0;
/* The Pegatron Lucid tablet sporadically waits for 98 seconds trying
* the handoff on its unused controller. Skip it. */
if (pdev->vendor == 0x8086 && pdev->device == 0x283a) {
/*
* The Pegatron Lucid tablet sporadically waits for 98 seconds trying
* the handoff on its unused controller. Skip it.
*
* The HASEE E200 hangs when the semaphore is set (bugzilla #77021).
*/
if (pdev->vendor == 0x8086 && (pdev->device == 0x283a ||
pdev->device == 0x27cc)) {
if (dmi_check_system(ehci_dmi_nohandoff_table))
try_handoff = 0;
}

2
drivers/usb/host/xhci-hub.c
View File

@ -287,7 +287,7 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) {
struct xhci_command *command;
command = xhci_alloc_command(xhci, false, false,
GFP_NOIO);
GFP_NOWAIT);
if (!command) {
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_free_command(xhci, cmd);

16
drivers/usb/misc/usbtest.c
View File

@ -7,7 +7,7 @@
#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/usb.h>
#define SIMPLE_IO_TIMEOUT 10000 /* in milliseconds */
@ -484,6 +484,14 @@ alloc_sglist(int nents, int max, int vary)
return sg;
}
static void sg_timeout(unsigned long _req)
{
struct usb_sg_request *req = (struct usb_sg_request *) _req;
req->status = -ETIMEDOUT;
usb_sg_cancel(req);
}
static int perform_sglist(
struct usbtest_dev *tdev,
unsigned iterations,
@ -495,6 +503,9 @@ static int perform_sglist(
{
struct usb_device *udev = testdev_to_usbdev(tdev);
int retval = 0;
struct timer_list sg_timer;
setup_timer_on_stack(&sg_timer, sg_timeout, (unsigned long) req);
while (retval == 0 && iterations-- > 0) {
retval = usb_sg_init(req, udev, pipe,
@ -505,7 +516,10 @@ static int perform_sglist(
if (retval)
break;
mod_timer(&sg_timer, jiffies +
msecs_to_jiffies(SIMPLE_IO_TIMEOUT));
usb_sg_wait(req);
del_timer_sync(&sg_timer);
retval = req->status;
/* FIXME check resulting data pattern */