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linux-uconsole/drivers
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Alan Stern bc2f02f745 USB: Check for dropped connection before switching to full speed 
commit 94c43b9897 upstream.

Some buggy USB disk adapters disconnect and reconnect multiple times
during the enumeration procedure.  This may lead to a device
connecting at full speed instead of high speed, because when the USB
stack sees that a device isn't able to enumerate at high speed, it
tries to hand the connection over to a full-speed companion
controller.

The logic for doing this is careful to check that the device is still
connected.  But this check is inadequate if the device disconnects and
reconnects before the check is done.  The symptom is that a device
works, but much more slowly than it is capable of operating.

The situation was made worse recently by commit 22547c4cc4 ("usb:
hub: Wait for connection to be reestablished after port reset"), which
increases the delay following a reset before a disconnect is
recognized, thus giving the device more time to reconnect.

This patch makes the check more robust.  If the device was
disconnected at any time during enumeration, we will now skip the
full-speed handover.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Zdenek Kabelac <zkabelac@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-08-16 13:40:30 -07:00
..
accessibility
acpi ACPI / scan: Prefer devices without _HID/_CID for _ADR matching 2017-08-06 19:19:45 -07:00
amba
android ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct 2016-11-10 16:36:33 +01:00
ata libata: array underflow in ata_find_dev() 2017-08-11 09:08:46 -07:00
atm
auxdisplay
base PM / Domains: defer dev_pm_domain_set() until genpd->attach_dev succeeds if present 2017-08-06 19:19:42 -07:00
bcma bcma: use (get|put)_device when probing/removing device driver 2017-03-12 06:37:30 +01:00
block virtio_blk: fix panic in initialization error path 2017-08-11 09:08:58 -07:00
bluetooth Bluetooth: hci_intel: add missing tty-device sanity check 2017-05-20 14:27:02 +02:00
bus bus: vexpress-config: fix device reference leak 2017-01-19 20:17:22 +01:00
cdrom
char tpm: Replace device number bitmap with IDR 2017-08-06 19:19:43 -07:00
clk clk: Make x86/ conditional on CONFIG_COMMON_CLK 2017-05-14 13:32:55 +02:00
clocksource clocksource/exynos_mct: Clear interrupt when cpu is shut down 2017-01-26 08:23:48 +01:00
connector
cpufreq cpufreq: s3c2416: double free on driver init error path 2017-07-05 14:37:22 +02:00
cpuidle ARM: cpuidle: Fix error return code 2016-10-16 17:36:15 +02:00
crypto crypto: caam - fix signals handling 2017-07-21 07:44:59 +02:00
dca
devfreq
dio
dma dmaengine: ti-dma-crossbar: Add some 'of_node_put()' in error path. 2017-08-06 19:19:45 -07:00
dma-buf
edac EDAC: Increment correct counter in edac_inc_ue_error() 2016-09-07 08:32:41 +02:00
eisa
extcon extcon: max77843: Use correct size for reading the interrupt register 2016-05-04 14:48:54 -07:00
firewire firewire: net: fix fragmented datagram_size off-by-one 2016-11-10 16:36:35 +01:00
firmware efi: Expose non-blocking set_variable() wrapper to efivars 2016-05-04 14:48:49 -07:00
fmc
fpga
gpio gpio: mpc8xxx: Correct irq handler function 2016-10-28 03:01:25 -04:00
gpu drm/virtio: fix framebuffer sparse warning 2017-08-11 09:08:58 -07:00
hid HID: ignore Petzl USB headlamp 2017-08-06 19:19:47 -07:00
hsi
hv hv: don't reset hv_context.tsc_page on crash 2017-04-27 09:09:34 +02:00
hwmon hwmon: (g762) Fix overflows and crash seen when writing limit attributes 2017-01-12 11:22:48 +01:00
hwspinlock
hwtracing intel_th: Fix a deadlock in modprobing 2016-08-10 11:49:30 +02:00
i2c i2c: piix4: Fix request_region size 2017-06-17 06:39:36 +02:00
ide
idle intel_idle: Support for Intel Xeon Phi Processor x200 Product Family 2016-09-15 08:27:46 +02:00
iio iio: light: tsl2563: use correct event code 2017-08-16 13:40:30 -07:00
infiniband iser-target: Avoid isert_conn->cm_id dereference in isert_login_recv_done 2017-08-11 09:08:50 -07:00
input Input: i8042 - fix crash at boot time 2017-07-27 15:06:08 -07:00
iommu iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid() 2017-07-05 14:37:22 +02:00
ipack
irqchip irqchip/mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND 2017-08-06 19:19:45 -07:00
isdn isdn/i4l: fix buffer overflow 2017-08-06 19:19:41 -07:00
leds leds: ktd2692: avoid harmless maybe-uninitialized warning 2017-05-14 13:32:55 +02:00
lguest
lightnvm lightnvm: put bio before return 2016-09-24 10:07:35 +02:00
macintosh
mailbox mailbox: handle empty message in tx_tick 2017-08-06 19:19:41 -07:00
mcb mcb: Fixed bar number assignment for the gdd 2016-06-01 12:15:53 -07:00
md md/raid5: add thread_group worker async_tx_issue_pending_all 2017-08-06 19:19:39 -07:00
media saa7164: fix double fetch PCIe access condition 2017-08-11 09:08:51 -07:00
memory memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing 2016-07-27 09:47:35 -07:00
memstick memstick: rtsx_usb_ms: Manage runtime PM when accessing the device 2016-10-28 03:01:35 -04:00
message
mfd mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode 2017-06-26 07:13:09 +02:00
misc scsi: ses: do not add a device to an enclosure if enclosure_add_links() fails. 2017-07-27 15:06:04 -07:00
mmc mmc: sdhci-iproc: suppress spurious interrupt with Multiblock read 2017-06-07 12:06:00 +02:00
mtd mtd: bcm47xxpart: don't fail because of bit-flips 2017-07-05 14:37:18 +02:00
net phy state machine: failsafe leave invalid RUNNING state 2017-08-11 09:08:57 -07:00
nfc nfc: fdp: fix NULL pointer dereference 2017-08-06 19:19:40 -07:00
ntb ntb_transport: Pick an unused queue 2017-02-23 17:43:10 +01:00
nubus
nvdimm libnvdimm, btt: fix btt_rw_page not returning errors 2017-08-06 19:19:42 -07:00
nvme nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too 2017-06-29 12:48:53 +02:00
nvmem nvmem: imx-ocotp: Fix wrong register size 2017-08-06 19:19:46 -07:00
of of: device: Export of_device_{get_modalias, uvent_modalias} to modules 2017-07-27 15:06:09 -07:00
oprofile
parisc parisc: DMA API: return error instead of BUG_ON for dma ops on non dma devs 2017-07-21 07:44:56 +02:00
parport parisc, parport_gsc: Fixes for printk continuation lines 2017-06-17 06:39:37 +02:00
pci PCI/PM: Restore the status of PCI devices across hibernation 2017-07-27 15:06:05 -07:00
pcmcia pcmcia: db1xxx_ss: fix last irq_to_gpio user 2016-04-20 15:42:09 +09:00
perf drivers/perf: arm_pmu: Fix leak in error path 2016-10-07 15:23:41 +02:00
phy phy: qcom-usb-hs: Add depends on EXTCON 2017-05-14 13:32:57 +02:00
pinctrl pinctrl: sh-pfc: Update info pointer after SoC-specific init 2017-07-15 11:57:46 +02:00
platform platform/x86: ideapad-laptop: handle ACPI event 1 2017-07-05 14:37:19 +02:00
pnp PNP: Add Broadwell to Intel MCH size workaround 2016-08-16 09:30:48 +02:00
power power: supply: bq24190_charger: Handle fault before status on interrupt 2017-05-14 13:32:54 +02:00
powercap
pps pps: do not crash when failed to register 2016-08-10 11:49:25 +02:00
ps3
ptp
pwm pwm: pca9685: Fix period change with same duty cycle 2017-03-15 09:57:14 +08:00
rapidio
ras
regulator regulator: tps65023: Fix inverted core enable logic. 2017-05-25 14:30:09 +02:00
remoteproc remoteproc: Fix potential race condition in rproc_add 2016-08-20 18:09:20 +02:00
reset
rpmsg
rtc rtc: tegra: Implement clock handling 2017-04-21 09:30:07 +02:00
s390 s390/qeth: avoid null pointer dereference on OSN 2017-06-07 12:05:57 +02:00
sbus
scsi scsi: qla2xxx: Get mutex lock before checking optrom_state 2017-08-11 09:08:57 -07:00
sfi
sh
sn
soc soc: qcom/spm: shut up uninitialized variable warning 2016-09-24 10:07:42 +02:00
spi spi: dw: Make debugfs name unique between instances 2017-08-06 19:19:44 -07:00
spmi spmi: Include OF based modalias in device uevent 2017-07-27 15:06:10 -07:00
ssb ssb: Fix error routine when fallback SPROM fails 2017-01-09 08:07:42 +01:00
staging staging:iio:resolver:ad2s1210 fix negative IIO_ANGL_VEL read 2017-08-16 13:40:29 -07:00
target iscsi-target: Fix iscsi_np reset hung task during parallel delete 2017-08-16 13:40:28 -07:00
tc
thermal thermal: cpu_cooling: Avoid accessing potentially freed structures 2017-07-27 15:06:02 -07:00
thunderbolt thunderbolt: Fix double free of drom buffer 2016-06-01 12:15:53 -07:00
tty vt: fix unchecked __put_user() in tioclinux ioctls 2017-07-21 07:44:57 +02:00
uio uio: fix dmem_region_start computation 2016-10-31 04:13:59 -06:00
usb USB: Check for dropped connection before switching to full speed 2017-08-16 13:40:30 -07:00
uwb uwb: fix device quirk on big-endian hosts 2017-05-25 14:30:17 +02:00
vfio vfio-pci: Handle error from pci_iomap 2017-08-06 19:19:46 -07:00
vhost vhost/scsi: fix reuse of &vq->iov[out] in response 2016-09-15 08:27:53 +02:00
video video: fbdev: cobalt_lcdfb: Handle return NULL error from devm_ioremap 2017-08-06 19:19:46 -07:00
virt
virtio virtio_balloon: init 1st buffer in stats vq 2017-03-31 09:49:53 +02:00
vlynq
vme vme: Fix wrong pointer utilization in ca91cx42_slave_get 2017-01-19 20:17:21 +01:00
w1 w1: ds2490: USB transfer buffers need to be DMAable 2017-03-12 06:37:29 +01:00
watchdog watchdog: bcm281xx: Fix use of uninitialized spinlock. 2017-07-05 14:37:21 +02:00
xen swiotlb-xen: update dev_addr after swapping pages 2017-07-05 14:37:18 +02:00
zorro
Kconfig
Makefile usb: Make sure usb/phy/of gets built-in 2017-05-20 14:26:59 +02:00