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3fb5102f9a
linux/drivers
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Lars-Peter Clausen 3fb5102f9a usb: gadget: ffs: Let setup() return USB_GADGET_DELAYED_STATUS 
[ Upstream commit 946ef68ad4 ]

Some UDC drivers (like the DWC3) expect that the response to a setup()
request is queued from within the setup function itself so that it is
available as soon as setup() has completed.

Upon receiving a setup request the function fs driver creates an event that
is made available to userspace. And only once userspace has acknowledged
that event the response to the setup request is queued.

So it violates the requirement of those UDC drivers and random failures can
be observed. This is basically a race condition and if userspace is able to
read the event and queue the response fast enough all is good. But if it is
not, for example because other processes are currently scheduled to run,
the USB host that sent the setup request will observe an error.

To avoid this the gadget framework provides the USB_GADGET_DELAYED_STATUS
return code. If a setup() callback returns this value the UDC driver is
aware that response is not yet available and can uses the appropriate
methods to handle this case.

Since in the case of function fs the response will never be available when
the setup() function returns make sure that this status code is used.

This fixed random occasional failures that were previously observed on a
DWC3 based system under high system load.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-30 07:49:12 +02:00
..
accessibility
acpi ACPICA: acpi: acpica: fix acpi operand cache leak in nseval.c 2018-05-30 07:49:11 +02:00
amba ARM: amba: Don't read past the end of sysfs "driver_override" buffer 2018-05-02 07:53:42 -07:00
android binder: add missing binder_unlock() 2018-02-28 10:17:23 +01:00
ata libata: blacklist Micron 500IT SSD with MU01 firmware 2018-05-30 07:48:51 +02:00
atm atm: zatm: Fix potential Spectre v1 2018-05-16 10:06:52 +02:00
auxdisplay
base regmap: Fix reversed bounds check in regmap_raw_write() 2018-04-24 09:32:06 +02:00
bcma
block block/loop: fix deadlock after loop_set_status 2018-04-24 09:32:03 +02:00
bluetooth Bluetooth: btusb: Add USB ID 7392:a611 for Edimax EW-7611ULB 2018-05-30 07:49:09 +02:00
bus bus: brcmstb_gisb: correct support for 64-bit address output 2018-04-13 19:50:05 +02:00
cdrom cdrom: information leak in cdrom_ioctl_media_changed() 2018-04-29 07:50:07 +02:00
char ipmi_ssif: Fix kernel panic at msg_done_handler 2018-05-30 07:49:12 +02:00
clk clk: Don't show the incorrect clock phase 2018-05-30 07:49:11 +02:00
clocksource clocksource/drivers/fsl_ftm_timer: Fix error return checking 2018-05-30 07:49:01 +02:00
connector
cpufreq cpufreq: cppc_cpufreq: Fix cppc_cpufreq_init() failure path 2018-05-30 07:49:11 +02:00
cpuidle cpuidle: coupled: remove unused define cpuidle_coupled_lock 2018-05-26 08:48:53 +02:00
crypto crypto: s5p-sss - Fix kernel Oops in AES-ECB mode 2018-02-25 11:03:55 +01:00
dca
devfreq PM / devfreq: Propagate error from devfreq_add_device() 2018-02-22 15:44:58 +01:00
dio
dma dmaengine: rcar-dmac: fix max_chunk_size for R-Car Gen3 2018-05-30 07:49:02 +02:00
dma-buf
edac EDAC, mv64x60: Fix an error handling path 2018-04-13 19:50:23 +02:00
eisa
extcon extcon: palmas: Check the parent instance to prevent the NULL 2017-11-21 09:21:18 +01:00
firewire firewire-ohci: work around oversized DMA reads on JMicron controllers 2018-05-30 07:48:52 +02:00
firmware firmware: dmi_scan: Fix handling of empty DMI strings 2018-05-30 07:48:56 +02:00
fmc
fpga
gpio gpio: rcar: Add Runtime PM handling for interrupts 2018-05-26 08:49:00 +02:00
gpu virtio-gpu: fix ioctl and expose the fixed status to userspace. 2018-05-30 07:49:02 +02:00
hid HID: roccat: prevent an out of bounds read in kovaplus_profile_activated() 2018-05-30 07:48:54 +02:00
hsi HSI: ssi_protocol: double free in ssip_pn_xmit() 2018-03-24 10:58:42 +01:00
hv Drivers: hv: vmbus: fix build warning 2018-02-25 11:03:46 +01:00
hwmon hwmon: (nct6775) Fix writing pwmX_mode 2018-05-30 07:49:10 +02:00
hwspinlock
hwtracing coresight: Fix disabling of CoreSight TPIU 2018-03-24 10:58:48 +01:00
i2c i2c: mv64xxx: Apply errata delay only in standard mode 2018-05-30 07:49:11 +02:00
ide
idle idle: i7300: add PCI dependency 2018-02-25 11:03:51 +01:00
iio iio: magnetometer: st_magn_spi: fix spi_device_id table 2018-04-13 19:50:21 +02:00
infiniband RDMA/ucma: Correct option size check using optlen 2018-05-30 07:49:05 +02:00
input Input: atmel_mxt_ts - add touchpad button mapping for Samsung Chromebook Pro 2018-05-16 10:06:48 +02:00
iommu iommu/vt-d: Fix a potential memory leak 2018-04-24 09:32:08 +02:00
ipack
irqchip irqchip/gic-v3: Change pr_debug message to pr_devel 2018-05-30 07:48:57 +02:00
isdn mISDN: Fix a sleep-in-atomic bug 2018-04-13 19:50:16 +02:00
leds leds: pca955x: Correct I2C Functionality 2018-04-13 19:50:09 +02:00
lguest
lightnvm
macintosh
mailbox mailbox: handle empty message in tx_tick 2017-08-06 19:19:41 -07:00
mcb
md bcache: quit dc->writeback_thread when BCACHE_DEV_DETACHING is set 2018-05-30 07:49:11 +02:00
media media: dmxdev: fix error code for invalid ioctls 2018-05-30 07:49:01 +02:00
memory ARM: OMAP2+: gpmc-onenand: propagate error on initialization failure 2017-12-16 10:33:51 +01:00
memstick
message scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo() 2018-05-30 07:48:58 +02:00
mfd mfd: palmas: Reset the POWERHOLD mux during power off 2018-03-24 10:58:44 +01:00
misc drivers/misc/vmw_vmci/vmci_queue_pair.c: fix a couple integer overflow tests 2018-04-13 19:50:02 +02:00
mmc mmc: sdhci-iproc: fix 32bit writes for TRANSFER_MODE register 2018-05-30 07:48:51 +02:00
mtd gpmi-nand: Handle ECC Errors in erased pages 2018-05-16 10:06:47 +02:00
net virtio-net: Fix operstate for virtio when no VIRTIO_NET_F_STATUS 2018-05-30 07:49:11 +02:00
nfc NFC: nfcmrvl: double free on error path 2018-03-22 09:23:23 +01:00
ntb ntb_transport: Fix bug with max_mw_size parameter 2018-05-30 07:48:55 +02:00
nubus
nvdimm libnvdimm, namespace: make 'resource' attribute only readable by root 2017-11-30 08:37:23 +00:00
nvme nvme-pci: Fix nvme queue cleanup if IRQ setup fails 2018-05-30 07:49:01 +02:00
nvmem nvmem: imx-ocotp: Fix wrong register size 2017-08-06 19:19:46 -07:00
of of: fix of_device_get_modalias returned length when truncating buffers 2018-03-22 09:23:21 +01:00
oprofile
parisc parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode 2018-05-30 07:49:10 +02:00
parport parport_pc: Add support for WCH CH382L PCI-E single parallel port card. 2018-04-08 11:52:00 +02:00
pci PCI: Restore config space on runtime resume despite being unbound 2018-05-30 07:49:12 +02:00
pcmcia
perf drivers/perf: arm_pmu: handle no platform_device 2018-03-22 09:23:26 +01:00
phy phy: work around 'phys' references to usb-nop-xceiv devices 2018-01-23 19:50:16 +01:00
pinctrl pinctrl: Really force states during suspend/resume 2018-03-24 10:58:48 +01:00
platform platform/chrome: Use proper protocol transfer function 2018-03-24 10:58:47 +01:00
pnp
power power: supply: pda_power: move from timer to delayed_work 2018-03-24 10:58:45 +01:00
powercap PowerCap: Fix an error code in powercap_register_zone() 2018-04-13 19:50:05 +02:00
pps
ps3
ptp time: Change posix clocks ops interfaces to use timespec64 2018-03-24 10:58:40 +01:00
pwm pwm: tegra: Increase precision in PWM rate calculation 2018-03-22 09:23:27 +01:00
rapidio
ras
regulator regulator: anatop: set default voltage selector for pcie 2018-03-24 10:58:40 +01:00
remoteproc
reset
rpmsg
rtc rtc: hctosys: Ensure system time doesn't overflow time_t 2018-05-30 07:49:10 +02:00
s390 s390/cio: clear timer when terminating driver I/O 2018-05-30 07:49:00 +02:00
sbus
scsi scsi: aacraid: Insure command thread is not recursively stopped 2018-05-30 07:49:07 +02:00
sfi
sh
sn
soc
spi spi: pxa2xx: Allow 64-bit DMA 2018-05-26 08:48:52 +02:00
spmi spmi: Include OF based modalias in device uevent 2017-07-27 15:06:10 -07:00
ssb ssb: mark ssb_bus_register as __maybe_unused 2018-02-25 11:03:44 +01:00
staging staging: ion : Donnot wakeup kswapd in ion system alloc 2018-04-29 07:50:01 +02:00
target tcm_fileio: Prevent information leak for short reads 2018-03-24 10:58:45 +01:00
tc
thermal thermal: imx: Fix race condition in imx_thermal_probe() 2018-04-24 09:32:08 +02:00
thunderbolt thunderbolt: Resume control channel after hibernation image is created 2018-04-24 09:32:07 +02:00
tty serial: mctrl_gpio: Add missing module license 2018-05-02 07:53:43 -07:00
uio
usb usb: gadget: ffs: Let setup() return USB_GADGET_DELAYED_STATUS 2018-05-30 07:49:12 +02:00
uwb uwb: ensure that endpoint is interrupt 2017-10-12 11:27:35 +02:00
vfio vfio/pci: Virtualize Maximum Read Request Size 2018-04-24 09:32:09 +02:00
vhost vhost: correctly remove wait queue during poll failure 2018-04-13 19:50:25 +02:00
video fbdev: Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper(). 2018-05-30 07:49:04 +02:00
virt
virtio virtio_balloon: prevent uninitialized variable use 2018-02-25 11:03:42 +01:00
vlynq
vme
w1
watchdog watchdog: f71808e_wdt: Fix magic close handling 2018-05-30 07:49:03 +02:00
xen xen/acpi: off by one in read_acpi_id() 2018-05-30 07:49:09 +02:00
zorro zorro: Set up z->dev.dma_mask for the DMA API 2018-05-30 07:49:11 +02:00
Kconfig
Makefile usb: build drivers/usb/common/ when USB_SUPPORT is set 2018-02-25 11:03:38 +01:00