AuxXxilium/linux_dsm_epyc7002
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42c22dbf81
linux_dsm_epyc7002/drivers
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Benjamin Tisssoires 42c22dbf81 HID: logitech-dj: Fix USB 3.0 issue 
This fix (not very clean though) should fix the long time USB3
issue that was spotted last year. The rational has been given by
Hans de Goede:

 ----

I think the most likely cause for this is a firmware bug
in the unifying receiver, likely a race condition.

The most prominent difference between having a USB-2 device
plugged into an EHCI (so USB-2 only) port versus an XHCI
port will be inter packet timing. Specifically if you
send packets (ie hid reports) one at a time, then with
the EHCI controller their will be a significant pause
between them, where with XHCI they will be very close
together in time.

The reason for this is the difference in EHCI / XHCI
controller OS <-> driver interfaces.

For non periodic endpoints (control, bulk) the EHCI uses a
circular linked-list of commands in dma-memory, which it
follows to execute commands, if the list is empty, it
will go into an idle state and re-check periodically.

The XHCI uses a ring of commands per endpoint, and if the OS
places anything new on the ring it will do an ioport write,
waking up the XHCI making it send the new packet immediately.

For periodic transfers (isoc, interrupt) the delay between
packets when sending one at a time (rather then queuing them
up) will be even larger, because they need to be inserted into
the EHCI schedule 2 ms in the future so the OS driver can be
sure that the EHCI driver does not try to start executing the
time slot in question before the insertion has completed.

So a possible fix may be to insert a delay between packets
being send to the receiver.

 ----

I tested this on a buggy Haswell USB 3.0 motherboard, and I always
get the notification after adding the msleep.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-16 22:48:21 +01:00
..
accessibility
acpi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
amba DMA-API: amba: get rid of separate dma_mask 2013-10-31 14:48:38 +00:00
ata tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
atm
auxdisplay
base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-11-13 17:40:34 +09:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2013-11-15 16:33:41 -08:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth 2013-11-05 15:58:21 -05:00
bus Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
cdrom
char Nothing really exciting: some groundwork for changing virtio endian, and 2013-11-15 13:28:47 +09:00
clk Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
clocksource
connector
cpufreq Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
cpuidle ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
crypto tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
dca
devfreq Merge branch 'pm-devfreq' 2013-11-07 19:24:20 +01:00
dio
dma Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
edac DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
eisa
extcon
firewire tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
firmware Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 07:55:21 +09:00
fmc
gpio Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
hid HID: logitech-dj: Fix USB 3.0 issue 2014-01-16 22:48:21 +01:00
hsi
hv
hwmon Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2013-11-15 16:35:10 -08:00
hwspinlock
i2c tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
ide ide: pmac: remove unnecessary pci_set_drvdata() 2013-11-14 18:21:25 -05:00
idle ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
iio kfifo API type safety 2013-11-15 09:32:23 +09:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-11-15 16:48:22 -08:00
iommu IOMMU Updates for Linux v3.13 2013-11-15 14:02:18 +09:00
ipack
irqchip Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
isdn isdn: icn: NULL dereference printing error message 2013-11-07 19:11:13 -05:00
leds
lguest x86, asmlinkage, lguest: Pass in globals into assembler statement 2013-11-07 12:13:05 +10:30
macintosh DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
mailbox
md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
memory
memstick tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
message drivers/message/i2o/driver.c: add missing destroy_workqueue() on error in i2o_driver_register() 2013-11-13 12:09:26 +09:00
mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
misc tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
mmc Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
nfc
ntb
nubus
of Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 07:55:21 +09:00
oprofile
parisc
parport Kconfig cleanups for v3.13 2013-11-15 14:05:15 -08:00
pci kfifo API type safety 2013-11-15 09:32:23 +09:00
pcmcia DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
phy
pinctrl GPIO bulk changes for the v3.13 development cycle 2013-11-12 15:50:46 +09:00
platform tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
pnp ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
power tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
powercap PowerCap: Fix build error with option -Werror=format-security 2013-11-05 02:36:57 +01:00
pps drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr 2013-11-13 12:09:35 +09:00
ps3
ptp
pwm
rapidio
regulator Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
remoteproc
reset
rpmsg
rtc tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
sbus
scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
sfi
sh
sn
spi tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
ssb
staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
target
tc
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2013-11-14 14:42:31 +09:00
tty Features: 2013-11-15 13:34:37 +09:00
uio drivers/uio/uio_pruss.c: use gen_pool_dma_alloc() to allocate sram memory 2013-11-13 12:09:23 +09:00
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
uwb Driver Core / sysfs patches for 3.13-rc1 2013-11-07 11:42:15 +09:00
vfio
vhost
video Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-11-15 14:19:54 +09:00
virt
virtio Nothing really exciting: some groundwork for changing virtio endian, and 2013-11-15 13:28:47 +09:00
vlynq
vme
w1 drivers/w1/masters/w1-gpio.c: use dev_get_platdata() 2013-11-15 09:32:21 +09:00
watchdog DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
xen Features: 2013-11-15 13:34:37 +09:00
zorro
Kconfig ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
Makefile ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00