linux/drivers/usb
John Ogness 8982c8440f usb: usb-skeleton: use irqsave() in USB's complete callback
The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-06-28 19:36:06 +09:00
..
atm USB: atm: fix up some remaining DEVICE_ATTR() usage 2018-01-24 08:49:52 +01:00
c67x00 USB: add SPDX identifiers to all remaining Makefiles 2017-11-07 15:53:48 +01:00
chipidea USB: chipidea: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
class usb: usblp: use irqsave() in USB's complete callback 2018-06-28 19:36:06 +09:00
common usb: common: Small class for USB role switches 2018-03-22 13:40:10 +01:00
core usb: usbfs: use irqsave() in USB's complete callback 2018-06-28 19:36:06 +09:00
dwc2 treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
dwc3 USB: dwc3: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
early usb: early: Correct the endpoint type value for bulk in endpoint 2017-12-07 16:03:15 +01:00
gadget vfs/y2038: inode timestamps conversion to timespec64 2018-06-15 07:31:07 +09:00
host USB: host: ehci-npcm7xx: Fix some error codes in probe 2018-06-28 19:32:42 +09:00
image USB/PHY patches for 4.15-rc1 2017-11-13 21:14:07 -08:00
isp1760 usb: isp1760: Replace mdelay with msleep in isp1760_stop 2018-04-22 15:49:42 +02:00
misc treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
mon USB: mon: use ktime_get_real_ts64 instead of getnstimeofday64 2018-06-25 21:58:26 +08:00
mtu3 USB: mtu3: no need to check return value of debugfs_create_dir() 2018-05-31 12:54:21 +02:00
musb USB: musb: clean up debugfs file and directory creation 2018-05-31 12:54:21 +02:00
phy phy: tegra: select USB_COMMON 2018-05-31 12:50:40 +02:00
renesas_usbhs treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
roles usb: roles: intel_xhci: Enable runtime PM 2018-05-24 18:17:00 +02:00
serial treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
storage treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
typec USB: typec: fsusb302: no need to check return value of debugfs_create_dir() 2018-05-31 16:03:59 +02:00
usbip usbip: vhci_sysfs: fix potential Spectre v1 2018-05-24 18:14:28 +02:00
wusbcore treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
Kconfig usb: select USB_COMMON for usb role switch config 2018-04-22 15:23:37 +02:00
Makefile usb: roles: Add Intel xHCI USB role switch driver 2018-03-22 13:49:27 +01:00
README
usb-skeleton.c usb: usb-skeleton: use irqsave() in USB's complete callback 2018-06-28 19:36:06 +09:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("hub_wq").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.