1
linux/drivers
Alan Stern 9da82bd464 USB: implement "soft" unbinding
This patch (as1091) changes the way usbcore handles interface
unbinding.  If the interface's driver supports "soft" unbinding (a new
flag in the driver structure) then in-flight URBs are not cancelled
and endpoints are not disabled.  Instead the driver is allowed to
continue communicating with the device (although of course it should
stop before its disconnect routine returns).

The purpose of this change is to allow drivers to do a clean shutdown
when they get unbound from a device that is still plugged in.  Killing
all the URBs and disabling the endpoints before calling the driver's
disconnect method doesn't give the driver any control over what
happens, and it can leave devices in indeterminate states.  For
example, when usb-storage unbinds it doesn't want to stop while in the
middle of transmitting a SCSI command.

The soft_unbind flag is added because in the past, a number of drivers
have experienced problems related to ongoing I/O after their disconnect
routine returned.  Hence "soft" unbinding is made available only to
drivers that claim to support it.

The patch also replaces "interface_to_usbdev(intf)" with "udev" in a
couple of places, a minor simplification.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:15:54 -07:00
..
accessibility
acpi APCI: revert another duplicated patch 2008-07-20 17:14:57 -07:00
amba
ata
atm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-07-18 02:39:39 -07:00
auxdisplay
base
block m68k: Return -ENODEV if no device is found 2008-07-20 17:24:38 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-20 17:43:29 -07:00
cdrom
char Merge branch 'x86/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-07-21 10:34:25 -07:00
clocksource
connector
cpufreq
cpuidle
crypto
dca
dio dio: use dio_match_device() in dio_bus_match() 2008-07-20 17:24:40 -07:00
dma
edac
eisa
firewire
firmware
gpio
gpu
hid
hwmon Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next 2008-07-21 00:55:14 -04:00
i2c
ide
ieee1394
infiniband Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-07-18 02:39:39 -07:00
input Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next 2008-07-21 00:55:14 -04:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-20 17:43:29 -07:00
leds
lguest
macintosh Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next 2008-07-21 00:55:14 -04:00
mca
md Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm 2008-07-21 10:30:10 -07:00
media Merge git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb 2008-07-20 21:14:42 -07:00
memstick
message
mfd mfd: let asic3 use mem resource instead of bus_shift 2008-07-20 19:56:44 +02:00
misc
mmc
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-21 11:29:52 -07:00
nubus
of
oprofile
parisc
parport
pci pci kernel-doc fatal error 2008-07-21 10:43:26 -07:00
pcmcia
pnp
power
ps3
rapidio
rtc
s390 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-07-18 02:39:39 -07:00
sbus
scsi
serial atmel_serial: Fix tty_port breakage 2008-07-20 17:12:37 -07:00
sh
sn
spi
ssb
tc
telephony
thermal
uio
usb USB: implement "soft" unbinding 2008-07-21 15:15:54 -07:00
video export c2p 2008-07-20 17:24:39 -07:00
virtio
w1
watchdog
xen Merge branch 'x86/paravirt-spinlocks' into x86/for-linus 2008-07-21 16:45:56 +02:00
zorro zorro: use memory_read_from_buffer 2008-07-20 17:24:38 -07:00
Kconfig
Makefile gpu: re-order GPU subdirectory vs char for AGP vs DRM startup. 2008-07-21 08:42:49 +10:00