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Alan Stern 7cbe5dca39 USB: add API for userspace drivers to "claim" ports 
This patch (as1258) implements a feature that users have been asking
for: It gives programs the ability to "claim" a port on a hub, via a
new usbfs ioctl.  A device plugged into a "claimed" port will not be
touched by the kernel beyond the immediate necessities of
initialization and enumeration.

In particular, when a device is plugged into a "claimed" port, the
kernel will not select and install a configuration.  And when a config
is installed by usbfs or sysfs, the kernel will not probe any drivers
for any of the interfaces.  (However the kernel will fetch various
string descriptors during enumeration.  One could argue that this
isn't really necessary, but the strings are exported in sysfs.)

The patch does not guarantee exclusive access to these devices; it is
still possible for more than one program to open the device file
concurrently.  Programs are responsible for coordinating access among
themselves.

A demonstration program showing how to use the new interface can be 
found in an attachment to

	http://marc.info/?l=linux-usb&m=124345857431452&w=2

The patch also makes a small simplification to the hub driver,
replacing a bunch of more-or-less useless variants of "out of memory"
with a single message.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-23 06:46:22 -07:00
..
accessibility braille_console: only register notifiers when the braille console is used 2008-10-02 15:53:13 -07:00
acpi x86: Trivial whitespace cleanups 2009-09-20 20:18:57 +02:00
amba Merge branches 'arm', 'at91', 'bcmring', 'ep93xx', 'mach-types', 'misc' and 'w90x900' into devel 2009-09-12 12:01:34 +01:00
ata trivial: fix comment typo in drivers/ata/pata_hpt37x.c 2009-09-21 15:15:53 +02:00
atm drivers/atm: Use DIV_ROUND_CLOSEST 2009-08-02 12:54:22 -07:00
auxdisplay
base mm: oom analysis: add shmem vmstat 2009-09-22 07:17:27 -07:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
bluetooth pcmcia: dtl1_cs: fix pcmcia_loop_config logic 2009-09-15 10:17:16 -07:00
cdrom const: make block_device_operations const 2009-09-22 07:17:25 -07:00
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
clocksource
connector
cpufreq Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2009-09-18 09:16:57 -07:00
cpuidle cpuidle: menu governor: reduce latency on exit 2009-09-22 07:17:45 -07:00
crypto
dca
dio
dma at_hdmac: Rework suspend_late()/resume_early() 2009-09-14 20:27:00 +02:00
edac trivial: fix typo "for for" in multiple files 2009-09-21 15:14:54 +02:00
eisa Merge branch 'akpm' 2009-06-16 19:50:13 -07:00
firewire driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
firmware mm: don't use alloc_bootmem_low() where not strictly needed 2009-09-22 07:17:38 -07:00
gpio trivial: add __init/__exit macros in drivers/gpio/bt8xxgpio.c 2009-09-21 15:14:59 +02:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2009-09-22 07:51:28 -07:00
hwmon hwmon: applesmc: restore accelerometer and keyboard backlight on resume 2009-09-22 07:17:49 -07:00
i2c [PATCH] i2c-imx: make bus available early 2009-09-19 23:36:56 +01:00
ide Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
idle
ieee1394 drivers: Kill now superfluous ->last_rx stores 2009-09-02 23:07:36 -07:00
ieee802154
infiniband trivial: fix typo "for for" in multiple files 2009-09-21 15:14:54 +02:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
isdn Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
leds
lguest trivial: fix typo "to to" in multiple files 2009-09-21 15:14:55 +02:00
macintosh trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
mca
md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
memstick const: make block_device_operations const 2009-09-22 07:17:25 -07:00
message Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
mfd drivers/mfd/ab3100-core.c: fix powerpc build error 2009-09-22 07:17:24 -07:00
misc const: mark remaining super_operations const 2009-09-22 07:17:24 -07:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
net trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
nubus
of
oprofile const: mark remaining super_operations const 2009-09-22 07:17:24 -07:00
parisc mm: replace various uses of num_physpages by totalram_pages 2009-09-22 07:17:38 -07:00
parport
pci Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-09-16 07:49:54 -07:00
pcmcia pcmcia: cleanup/fixup patch for sa1100_jornada_pcmcia driver 2009-09-22 07:17:42 -07:00
platform
pnp pnp: add a shutdown method to pnp drivers 2009-09-22 07:17:49 -07:00
power
pps
ps3 powerpc/ps3: Workaround for flash memory I/O error 2009-09-11 11:28:00 +10:00
rapidio
regulator regulator: Voltage count for AB3100 2009-09-17 15:48:24 +02:00
rtc trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
sbus const: make block_device_operations const 2009-09-22 07:17:25 -07:00
scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
serial uartlite: support shared interrupt lines 2009-09-19 13:13:38 -07:00
sh
sn dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) 2009-04-07 08:31:10 -07:00
spi trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
ssb ssb/sdio: fix printk format warnings 2009-09-16 16:21:00 -04:00
staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
tc
telephony
thermal
uio Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2009-09-18 09:43:09 -07:00
usb USB: add API for userspace drivers to "claim" ports 2009-09-23 06:46:22 -07:00
uwb trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
video trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
virtio virtio: refactor find_vqs 2009-07-30 16:03:45 +09:30
vlynq
w1
watchdog [WATCHDOG] sizeof cleanup 2009-09-18 08:39:37 +00:00
xen Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
zorro zorro: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
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