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Mark Rutland d0a963cf84 drivers/perf: arm-ccn: don't log to dmesg in event_init 
[ Upstream commit 1898eb61fb ]

The ARM CCN PMU driver uses dev_warn() to complain about parameters in
the user-provided perf_event_attr. This means that under normal
operation (e.g. a single invocation of the perf tool), a number of
messages warnings may be logged to dmesg.

Tools may issue multiple syscalls to probe for feature support, and
multiple applications (from multiple users) can attempt to open events
simultaneously, so this is not very helpful, even if a user happens to
have access to dmesg. Worse, this can push important information out of
the dmesg ring buffer, and can significantly slow down syscall fuzzers,
vastly increasing the time it takes to find critical bugs.

Demote the dev_warn() instances to dev_dbg(), as is the case for all
other PMU drivers under drivers/perf/. Users who wish to debug PMU event
initialisation can enable dynamic debug to receive these messages.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-08-03 07:50:31 +02:00
..
accessibility
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acpi PCI: pciehp: Request control of native hotplug only if supported 2018-08-03 07:50:31 +02:00
amba ARM: amba: Don't read past the end of sysfs "driver_override" buffer 2018-05-01 12:58:21 -07:00
android ANDROID: binder: prevent transactions into own process. 2018-05-01 12:58:20 -07:00
ata ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS 2018-07-17 11:39:25 +02:00
atm atm: zatm: Fix potential Spectre v1 2018-07-22 14:28:43 +02:00
auxdisplay auxdisplay: fix broken menu 2018-07-03 11:24:56 +02:00
base driver core: Partially revert "driver core: correct device's shutdown order" 2018-07-28 07:55:44 +02:00
bcma
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block loop: remember whether sysfs_create_group() was done 2018-07-17 11:39:33 +02:00
bluetooth Bluetooth: btusb: Add a new Realtek 8723DE ID 2ff8:b011 2018-08-03 07:50:27 +02:00
bus drivers/perf: arm-ccn: don't log to dmesg in event_init 2018-08-03 07:50:31 +02:00
cdrom cdrom: do not call check_disk_change() inside cdrom_open() 2018-05-30 07:52:34 +02:00
char tpm: fix race condition in tpm_common_write() 2018-07-03 11:24:53 +02:00
clk clk: at91: PLL recalc_rate() now using cached MUL and DIV values 2018-07-03 11:24:59 +02:00
clocksource clocksource/drivers/imx-tpm: Correct some registers operation flow 2018-06-21 04:02:40 +09:00
connector
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cpufreq cpufreq: intel_pstate: Register when ACPI PCCH is present 2018-07-25 11:25:08 +02:00
cpuidle cpuidle: powernv: Fix promotion from snooze if next state disabled 2018-07-03 11:24:51 +02:00
crypto crypto: crypto4xx - fix crypto4xx_build_pdr, crypto4xx_build_sdr leak 2018-07-22 14:28:43 +02:00
dax dax: check for QUEUE_FLAG_DAX in bdev_dax_supported() 2018-07-11 16:29:22 +02:00
dca
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devfreq PM / devfreq: Fix potential NULL pointer dereference in governor_store 2018-04-12 12:32:13 +02:00
dio
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dma dmaengine: qcom: bam_dma: get num-channels and num-ees from dt 2018-05-30 07:52:37 +02:00
dma-buf dma-buf: remove redundant initialization of sg_table 2018-06-05 11:41:57 +02:00
edac x86/mce/AMD, EDAC/mce_amd: Enumerate Reserved SMCA bank type 2018-04-19 08:56:20 +02:00
eisa
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extcon extcon: intel-cht-wc: Set direction and drv flags for V5 boost GPIO 2018-04-24 09:36:29 +02:00
firewire firewire-ohci: work around oversized DMA reads on JMicron controllers 2018-04-26 11:02:03 +02:00
firmware efi/libstub/arm64: Handle randomized TEXT_OFFSET 2018-06-21 04:03:01 +09:00
fmc
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fpga fpga-manager: altera-ps-spi: preserve nCONFIG state 2018-05-01 12:58:24 -07:00
fsi
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gpio gpio: No NULL owner 2018-06-16 09:45:14 +02:00
gpu drm/nouveau: Set DRIVER_ATOMIC cap earlier to fix debugfs 2018-07-28 07:55:41 +02:00
hid HID: debug: check length before copy_to_user() 2018-07-11 16:29:20 +02:00
hsi
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hv Drivers: hv: vmbus: do not mark HV_PCIE as perf_device 2018-04-19 08:56:16 +02:00
hwmon hwmon: (pmbus/adm1275) Accept negative page register values 2018-05-30 07:52:34 +02:00
hwspinlock
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hwtracing intel_th: Use correct device when freeing buffers 2018-06-05 11:41:59 +02:00
i2c i2c: core: decrease reference count of device node in i2c_unregister_device 2018-08-03 07:50:20 +02:00
ide cdrom: do not call check_disk_change() inside cdrom_open() 2018-05-30 07:52:34 +02:00
idle Revert "x86/mm: Stop calling leave_mm() in idle code" 2017-11-04 15:01:50 +01:00
iio iio: sca3000: Fix an error handling path in 'sca3000_probe()' 2018-07-03 11:24:57 +02:00
infiniband RDMA/mad: Convert BUG_ONs to error flows 2018-08-03 07:50:25 +02:00
input Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST 2018-08-03 07:50:21 +02:00
iommu iommu/vt-d: fix shift-out-of-bounds in bug checking 2018-06-21 04:02:53 +09:00
ipack
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irqchip irqchip/ls-scfg-msi: Map MSIs in the iommu 2018-08-03 07:50:24 +02:00
isdn isdn: eicon: fix a missing-check bug 2018-06-11 22:49:19 +02:00
leds leds: pm8058: Silence pointer to integer size warning 2018-03-19 08:42:50 +01:00
lightnvm lightnvm: pblk: warn in case of corrupted write buffer 2018-08-03 07:50:25 +02:00
macintosh drivers: macintosh: rack-meter: really fix bogus memsets 2018-05-30 07:52:27 +02:00
mailbox mailbox: mailbox-test: don't rely on rx_buffer content to signal data ready 2017-12-14 09:53:12 +01:00
mcb
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md dm: prevent DAX mounts if not supported 2018-07-11 16:29:23 +02:00
media media: videobuf2-core: don't call memop 'finish' when queueing 2018-08-03 07:50:28 +02:00
memory
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memstick
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message scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo() 2018-05-25 16:17:47 +02:00
mfd mfd: cros_ec: Fail early if we cannot identify the EC 2018-08-03 07:50:27 +02:00
misc cxl_getfile(): fix double-iput() on alloc_file() failures 2018-07-25 11:25:11 +02:00
mmc mmc: dw_mmc: fix card threshold control configuration 2018-07-17 11:39:23 +02:00
mtd mtd: rawnand: denali_dt: set clk_x_rate to 200 MHz unconditionally 2018-07-22 14:28:48 +02:00
mux mux: core: fix double get_device() 2018-01-17 09:45:27 +01:00
net mwifiex: correct histogram data with appropriate index 2018-08-03 07:50:31 +02:00
nfc NFC: pn533: don't send USB data off of the stack 2018-06-16 09:45:15 +02:00
ntb ntb_transport: Fix bug with max_mw_size parameter 2018-04-26 11:02:13 +02:00
nubus
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nvdimm linvdimm, pmem: Preserve read-only setting for pmem devices 2018-07-03 11:24:58 +02:00
nvme nvme-pci: Fix AER reset handling 2018-08-03 07:50:29 +02:00
nvmem
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of of: platform: stop accessing invalid dev in of_platform_device_destroy 2018-07-03 11:24:52 +02:00
oprofile
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parisc parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode 2018-05-30 07:52:28 +02:00
parport parport_pc: Add support for WCH CH382L PCI-E single parallel port card. 2018-04-08 14:26:31 +02:00
pci PCI: Prevent sysfs disable of device while driver is attached 2018-08-03 07:50:29 +02:00
pcmcia PCMCIA / PM: Avoid noirq suspend aborts during suspend-to-idle 2018-05-30 07:52:39 +02:00
perf
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phy phy: qcom-qusb2: Fix crash if nvmem cell not specified 2018-06-16 09:45:16 +02:00
pinctrl pinctrl: at91-pio4: add missing of_node_put 2018-08-03 07:50:31 +02:00
platform platform/x86: asus-wmi: Fix NULL pointer dereference 2018-07-08 15:30:53 +02:00
pnp
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power power: supply: ltc2941-battery-gauge: Fix temperature units 2018-05-30 07:52:38 +02:00
powercap
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pps
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ps3
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ptp ptp: fix missing break in switch 2018-07-25 11:25:10 +02:00
pwm pwm: lpss: platform: Save/restore the ctrl register over a suspend/resume 2018-07-03 11:25:03 +02:00
rapidio drivers/rapidio/devices/rio_mport_cdev.c: fix resource leak in error handling path in 'rio_dma_transfer()' 2017-12-14 09:53:08 +01:00
ras
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regulator regulator: of: Add a missing 'of_node_put()' in an error handling path of 'of_regulator_match()' 2018-05-30 07:52:41 +02:00
remoteproc remoteproc: qcom: Fix potential device node leaks 2018-06-21 04:02:48 +09:00
reset
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rpmsg rpmsg: smd: do not use mananged resources for endpoints and channels 2018-07-03 11:24:59 +02:00
rtc rtc: ensure rtc_set_alarm fails when alarms are not supported 2018-08-03 07:50:23 +02:00
s390 s390/dasd: use blk_mq_rq_from_pdu for per request data 2018-07-08 15:30:51 +02:00
sbus
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scsi scsi: sd_zbc: Fix variable type and bogus comment 2018-07-25 11:25:06 +02:00
sfi
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sh
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sn
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soc soc: rockchip: power-domain: Fix wrong value when power up pd with writemask 2018-07-03 11:24:51 +02:00
spi spi: sh-msiof: Fix setting SIRMDR1.SYNCAC to match SITMDR1.SYNCAC 2018-08-03 07:50:31 +02:00
spmi
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ssb
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staging staging: speakup: fix wraparound in uaccess length check 2018-07-28 07:55:44 +02:00
target scsi: target: Fix truncated PR-in ReadKeys response 2018-07-11 16:29:14 +02:00
tc
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tee tee: check shm references are consistent in offset/size 2018-06-21 04:02:54 +09:00
thermal thermal: bcm2835: Stop using printk format %pCr 2018-07-03 11:24:48 +02:00
thunderbolt thunderbolt: Prevent crash when ICM firmware is not running 2018-04-24 09:36:29 +02:00
tty hvc_opal: don't set tb_ticks_per_usec in udbg_init_opal_common() 2018-08-03 07:50:25 +02:00
uio uio_hv_generic: check that host supports monitor page 2018-04-12 12:32:19 +02:00
usb usb: gadget: f_fs: Only return delayed status when len is 0 2018-07-28 07:55:44 +02:00
uwb
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vfio vfio/type1: Fix task tracking for QEMU vCPU hotplug 2018-08-03 07:50:23 +02:00
vhost vhost_net: validate sock before trying to put its fd 2018-07-22 14:28:47 +02:00
video video: uvesafb: Fix integer overflow in allocation 2018-07-03 11:25:02 +02:00
virt
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virtio virtio_ring: fix num_free handling in error case 2018-03-15 10:54:32 +01:00
vlynq
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vme
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w1 1wire: family module autoload fails because of upper/lower case mismatch. 2018-07-03 11:24:47 +02:00
watchdog watchdog: da9063: Fix updating timeout value 2018-08-03 07:50:24 +02:00
xen xen: Remove unnecessary BUG_ON from __unbind_from_irq() 2018-07-03 11:25:03 +02:00
zorro zorro: Set up z->dev.dma_mask for the DMA API 2018-05-30 07:52:30 +02:00
Kconfig
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Makefile usb: build drivers/usb/common/ when USB_SUPPORT is set 2018-02-25 11:07:53 +01:00