kernel.git/drivers/usb/core/hub.c, branch linux-3.9.y

usb: forbid memory allocation with I/O during bus reset

2013-02-24T01:50:16Z

If one storage interface or usb network interface(iSCSI case) exists in current configuration, memory allocation with GFP_KERNEL during usb_device_reset() might trigger I/O transfer on the storage interface itself and cause deadlock because the 'us->dev_mutex' is held in .pre_reset() and the storage interface can't do I/O transfer when the reset is triggered by other interface, or the error handling can't be completed if the reset is triggered by the storage itself (error handling path). Signed-off-by: Ming Lei Cc: "David S. Miller" Cc: Eric Dumazet Cc: David Decotigny Cc: Tom Herbert Cc: Ingo Molnar Cc: Jens Axboe Cc: Minchan Kim Cc: Alan Stern Cc: Oliver Neukum Reviewed-by: Jiri Kosina Cc: Mel Gorman Cc: KAMEZAWA Hiroyuki Cc: Michal Hocko Cc: Ingo Molnar Cc: Peter Zijlstra Cc: "Rafael J. Wysocki" Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge usb-linus branch into usb-next

2013-02-08T20:03:11Z

This pulls in a bunch of fixes that are in Linus's tree because we need them here for testing and development. Signed-off-by: Greg Kroah-Hartman

usb: add usb port auto power off mechanism

2013-01-25T18:14:20Z

This patch is to add usb port auto power off mechanism. When usb device is suspending, usb core will suspend usb port and usb port runtime pm callback will clear PORT_POWER feature to power off port if all conditions were met. These conditions are remote wakeup disable, pm qos NO_POWER_OFF flag clear and persist enable. When it resumes, power on port again. Add did_runtime_put in the struct usb_port to ensure pm_runtime_get/put(portdev) to be called pairedly. Set did_runtime_put to true when call pm_runtime_put(portdev) during suspending. The pm_runtime_get(portdev) only will be called when did_runtime_put is set to true during resuming. Set did_runtime_put to false after calling pm_runtime_get(portdev). Make clear_port_feature() and hdev_to_hub() as global symbol. Rename clear_port_feature() to usb_clear_port_feature() and hdev_to_hub() to usb_hub_to_struct_hub(). Extend hub_port_debounce() with the fuction of debouncing to be connected. Add two wraps: hub_port_debounce_be_connected() and hub_port_debouce_be_stable(). Increase HUB_DEBOUNCE_TIMEOUT to 2000 because some usb ssds needs around 1.5 or more to make the hub port status to be connected steadily after being powered off and powered on. Acked-by: Alan Stern Acked-by: Rafael J. Wysocki Signed-off-by: Lan Tianyu Signed-off-by: Greg Kroah-Hartman

usb: add runtime pm support for usb port device

2013-01-25T18:12:19Z

This patch is to add runtime pm callback for usb port device. Set/clear PORT_POWER feature in the resume/suspend callback. Add portnum for struct usb_port to record port number. Do pm_rumtime_get_sync/put(portdev) when a device is plugged/unplugged to prevent it from being powered off when it is active. Acked-by: Alan Stern Acked-by: Rafael J. Wysocki Signed-off-by: Lan Tianyu Signed-off-by: Greg Kroah-Hartman

usb: Using correct way to clear usb3.0 device's remote wakeup feature.

2013-01-24T17:58:18Z

Usb3.0 device defines function remote wakeup which is only for interface recipient rather than device recipient. This is different with usb2.0 device's remote wakeup feature which is defined for device recipient. According usb3.0 spec 9.4.5, the function remote wakeup can be modified by the SetFeature() requests using the FUNCTION_SUSPEND feature selector. This patch is to use correct way to disable usb3.0 device's function remote wakeup after suspend error and resuming. This should be backported to kernels as old as 3.4, that contain the commit 623bef9e03a60adc623b09673297ca7a1cdfb367 "USB/xhci: Enable remote wakeup for USB3 devices." Signed-off-by: Lan Tianyu Signed-off-by: Sarah Sharp Cc: stable@vger.kernel.org

USB: Set usb port's DeviceRemovable according acpi information

2013-01-21T21:22:03Z

ACPI provide "_PLD" and "_UPC" aml methods to describe usb port visibility and connectability. This patch is to add usb_hub_adjust_DeviceRemovable() to adjust usb hub port's DeviceRemovable according ACPI information and invoke it in the rh_call_control(). When hub descriptor request is issued at first time, usb port device isn't created and usb port is not bound with acpi. So first hub descriptor request is not changed based on ACPI information. After usb port devices being created, call usb_hub_adjust_DeviceRemovable in the hub_configure() and then set hub port's DeviceRemovable according ACPI information and this also works for non-root hub. Acked-by: Alan Stern Signed-off-by: Lan Tianyu Signed-off-by: Greg Kroah-Hartman

usb: Create link files between child device and usb port device.

2013-01-21T00:10:46Z

To show the relationship between usb port and child device, add link file "port" under usb device's sysfs directoy and "device" under usb port device's sysfs directory. They are linked to each other. Acked-by: Alan Stern Signed-off-by: Lan Tianyu Signed-off-by: Greg Kroah-Hartman

usb: Add driver/usb/core/(port.c,hub.h) files

2013-01-18T23:49:00Z

This patch is to create driver/usb/core/(port.c,hub.h) files and move usb port related code into port.c. Signed-off-by: Lan Tianyu Signed-off-by: Greg Kroah-Hartman

Merge 3.8-rc4 into usb-next

2013-01-18T17:17:17Z

This pulls in all of the -rc4 fixes into usb-next to sync things up. Signed-off-by: Greg Kroah-Hartman

usb/core: update power budget for SuperSpeed

2013-01-12T00:16:01Z

Sarah pointed out that the USB3.0 spec also updates the amount of power that may be consumed by the device and quoted 9.2.5.1: |"The amount of current draw for SuperSpeed devices are increased to 150 |mA for low-power devices and 900 mA for high-power" This patch tries to update all users to use the larger values for SuperSpeed devices and use the "old" ones for everything else. While here, two other changes suggested by Alan: - the comment referering to 7.2.1.1 has been updated to 7.2.1 which is the correct source of the action. - the check for hubs with zero ports has been removed. - compute bus power by full_load * num_ports on root hubs Acked-by: Alan Stern Acked-by: Sarah Sharp Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Greg Kroah-Hartman