linux-sg2042/drivers
Alan Stern 8ef42ddd9a USB: Avoid runtime suspend loops for HCDs that can't handle suspend/resume
Not all host controller drivers have bus-suspend and bus-resume
methods.  When one doesn't, it will cause problems if runtime PM is
enabled in the kernel.  The PM core will attempt to suspend the
controller's root hub, the suspend will fail because there is no
bus-suspend routine, and a -EBUSY error code will be returned to the
PM core.  This will cause the suspend attempt to be repeated shortly
thereafter, in a never-ending loop.

Part of the problem is that the original error code -ENOENT gets
changed to -EBUSY in usb_runtime_suspend(), on the grounds that the PM
core will interpret -ENOENT as meaning that the root hub has gotten
into a runtime-PM error state.  While this change is appropriate for
real USB devices, it's not such a good idea for a root hub.  In fact,
considering the root hub to be in a runtime-PM error state would not
be far from the truth.  Therefore this patch updates
usb_runtime_suspend() so that it adjusts error codes only for
non-root-hub devices.

Furthermore, the patch attempts to prevent the problem from occurring
in the first place by not enabling runtime PM by default for root hubs
whose host controller driver doesn't have bus_suspend and bus_resume
methods.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Will Deacon <will.deacon@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-24 04:06:00 +09:00
..
accessibility
acpi Merge branches 'acpi-ec' and 'acpi-processor' 2014-05-03 00:20:31 +02:00
amba ARM: SoC: driver changes 2014-04-05 15:37:40 -07:00
ata Merge branch 'for-3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-04-24 09:57:02 -07:00
atm
auxdisplay
base drivercore: deferral race condition fix 2014-04-29 15:44:05 +01:00
bcma bcma: gpio: register 32 GPIOs on BCM5357 2014-03-27 14:20:04 -04:00
block floppy: don't write kernel-only members to FDRAWCMD ioctl output 2014-05-05 07:46:56 -07:00
bluetooth Bluetooth: Add support for Lite-on [04ca:3007] 2014-04-25 09:47:16 +03:00
bus ARM: SoC: driver changes 2014-04-05 15:37:40 -07:00
cdrom
char agp: info leak in agpioc_info_wrap() 2014-05-06 13:05:00 -07:00
clk vexpress: Initialise the sysregs before setting up the clocks 2014-05-04 11:35:29 +01:00
clocksource Merge branch 'clockevents/3.15-fixes' of git://git.linaro.org/people/daniel.lezcano/linux into timers/urgent 2014-04-29 19:26:58 +02:00
connector net: Use netlink_ns_capable to verify the permisions of netlink messages 2014-04-24 13:44:54 -04:00
cpufreq cpufreq: ppc-corenet-cpufreq: Fix __udivdi3 modpost error 2014-04-29 01:28:17 +02:00
cpuidle Merge branch 'pm-cpuidle' 2014-04-08 13:27:40 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-04-03 09:28:16 -07:00
dca
devfreq
dio
dma dma: fix eDMA driver as a subsys_initcall 2014-04-16 12:03:47 +05:30
edac Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-04-04 09:50:07 -07:00
eisa
extcon
firewire
firmware Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-11 11:58:33 -07:00
fmc
gpio A few fixes for the GPIO tree: 2014-04-22 09:28:02 -07:00
gpu Merge branch 'mullins' of git://people.freedesktop.org/~deathsimple/linux into drm-fixes 2014-05-07 09:10:28 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-05-07 16:07:58 -07:00
hsi
hv Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts 2014-04-16 14:14:07 -07:00
hwmon Revert "hwmon: (coretemp) Refine TjMax detection" 2014-05-01 04:07:52 -07:00
hwspinlock
i2c Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2014-04-09 08:45:40 -07:00
ide
idle intel_idle: fix IVT idle state table setting 2014-04-21 23:36:07 +02:00
iio iio: adc: Nothing in ADC should be a bool CONFIG 2014-04-26 11:22:16 +01:00
infiniband RDMA/cxgb4: Update Kconfig to include Chelsio T5 adapter 2014-04-28 17:29:41 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-05-08 14:06:45 -07:00
iommu Merge git://git.infradead.org/iommu-2.6 into iommu/fixes 2014-04-16 16:09:40 +02:00
ipack
irqchip mvebu irqchip ifxes for v3.15 2014-04-29 19:23:22 +02:00
isdn hisax/icc: add missing semicolon after label 2014-04-22 21:22:47 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-04-10 09:06:10 -07:00
lguest drivers/lguest/page_tables.c: rename do_set_pte() 2014-04-07 16:35:52 -07:00
macintosh
mailbox
mcb drivers: mcb: fix memory leak in chameleon_parse_cells() error path 2014-04-16 12:28:47 -07:00
md A few dm-thinp fixes for changes merged in 3.15-rc1. 2014-05-02 14:14:02 -07:00
media platform: Fix timberdale dependencies 2014-04-16 11:57:27 +05:30
memory
memstick
message PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
mfd mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req" 2014-05-08 08:44:50 +01:00
misc misc: Grammar s/addition/additional/ 2014-04-16 12:28:47 -07:00
mmc mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req" 2014-05-08 08:44:50 +01:00
mtd MTD update for 3.15-rc5 2014-05-07 16:28:52 -07:00
net net: macb: Fix race between HW and driver 2014-05-05 17:11:18 -04:00
nfc
ntb ntb: Use pci_enable_msix_range() instead of pci_enable_msix() 2014-04-07 10:59:20 -07:00
nubus
of of/irq: do irq resolution in platform_get_irq 2014-04-24 21:40:22 +01:00
oprofile
parisc
parport
pci PCI: tegra: Use new OF interrupt mapping when possible 2014-04-16 10:24:32 -06:00
pcmcia PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
phy phy: fix kernel oops in phy_lookup() 2014-04-24 12:53:38 -07:00
pinctrl sh-pfc: r8a7791: Fix definition of MOD_SEL3 2014-04-23 16:09:53 +02:00
platform alienware-wmi: cover some scenarios where memory allocations would fail 2014-04-10 12:11:56 -04:00
pnp asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/* 2014-05-05 16:07:46 -07:00
power power/reset: vexpress: Fix restart/power off operation 2014-04-24 17:20:50 +01:00
powercap CPU hotplug notifiers registration fixes for 3.15-rc1 2014-04-07 14:55:46 -07:00
pps
ps3
ptp net: ptp: move PTP classifier in its own file 2014-04-01 16:43:18 -04:00
pwm Shiraz has moved 2014-04-18 16:40:08 -07:00
rapidio rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00
regulator regulator: pbias: Convert to use regmap helper functions 2014-04-14 22:16:25 +01:00
remoteproc
reset Merge branch 'reset/for_v3.15' of git://git.pengutronix.de/git/pza/linux into next/drivers 2014-03-27 01:28:19 +01:00
rpmsg
rtc drivers/rtc/rtc-pcf8523.c: fix month definition 2014-05-06 13:04:58 -07:00
s390 s390/chsc: fix SEI usage on old FW levels 2014-04-17 12:46:28 +02:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-05-05 15:59:46 -07:00
sfi
sh ARM: SoC: sh driver changes 2014-04-05 15:38:41 -07:00
sn
spi Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bfin5xx', 'spi/fix/hspi' and 'spi/fix/sirf' into spi-linus 2014-04-23 13:50:18 +01:00
spmi
ssb
staging Second set of fixes for IIO in the 3.15 cycle. 2014-04-30 14:19:23 -07:00
target Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-04-12 17:31:22 -07:00
tc
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-04-10 09:15:46 -07:00
tty tty: Fix lockless tty buffer race 2014-05-03 18:14:28 -04:00
uio
usb USB: Avoid runtime suspend loops for HCDs that can't handle suspend/resume 2014-05-24 04:06:00 +09:00
uwb uwb: don't call spin_unlock_irq in a USB completion handler 2014-04-24 12:45:40 -07:00
vfio VFIO updates for v3.15 include: 2014-04-03 14:05:02 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-04-12 16:51:08 -07:00
video video: Kconfig: move drm and fb into separate menus 2014-04-17 08:10:20 +03:00
virt
virtio
vlynq
vme vme_tsi148: Utilize to_pci_dev() macro 2014-04-16 14:08:37 -07:00
w1 w1: avoid recursive device_add 2014-04-16 14:07:51 -07:00
watchdog CPU hotplug notifiers registration fixes for 3.15-rc1 2014-04-07 14:55:46 -07:00
xen Xen regression and bug fixes for 3.15-rc1. 2014-04-17 10:54:07 -07:00
zorro
Kconfig
Makefile video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00