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José Roberto de Souza 6fd5e50add drm/i915/ilk: Fix warning when reading emon_status with no output 
[ Upstream commit cab870b7fd ]

When there is no output no one will hold a runtime_pm reference
causing a warning when trying to read emom_status in debugfs.

[22.756480] ------------[ cut here ]------------
[22.756489] RPM wakelock ref not held during HW access
[22.756578] WARNING: CPU: 0 PID: 1058 at drivers/gpu/drm/i915/intel_drv.h:2104 gen5_read32+0x16b/0x1a0 [i915]
[22.756580] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core e1000e snd_pcm mei_me prime_numbers mei lpc_ich
[22.756595] CPU: 0 PID: 1058 Comm: debugfs_test Not tainted 4.20.0-rc1-CI-Trybot_3219+ #1
[22.756597] Hardware name: Hewlett-Packard HP Compaq 8100 Elite SFF PC/304Ah, BIOS 786H1 v01.13 07/14/2011
[22.756634] RIP: 0010:gen5_read32+0x16b/0x1a0 [i915]
[22.756637] Code: a4 ea e0 0f 0b e9 d2 fe ff ff 80 3d a5 71 19 00 00 0f 85 d3 fe ff ff 48 c7 c7 48 d0 2d a0 c6 05 91 71 19 00 01 e8 35 a4 ea e0 <0f> 0b e9 b9 fe ff ff e8 69 c6 f2 e0 85 c0 75 92 48 c7 c2 78 d0 2d
[22.756639] RSP: 0018:ffffc90000f1fd38 EFLAGS: 00010282
[22.756642] RAX: 0000000000000000 RBX: ffff8801f7ab0000 RCX: 0000000000000006
[22.756643] RDX: 0000000000000006 RSI: ffffffff8212886a RDI: ffffffff820d6d57
[22.756645] RBP: 0000000000011020 R08: 0000000043e3d1a8 R09: 0000000000000000
[22.756647] R10: ffffc90000f1fd80 R11: 0000000000000000 R12: 0000000000000001
[22.756649] R13: ffff8801f7ab0068 R14: 0000000000000001 R15: ffff88020d53d188
[22.756651] FS:  00007f2878849980(0000) GS:ffff880213a00000(0000) knlGS:0000000000000000
[22.756653] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[22.756655] CR2: 00005638deedf028 CR3: 0000000203292001 CR4: 00000000000206f0
[22.756657] Call Trace:
[22.756689]  i915_mch_val+0x1b/0x60 [i915]
[22.756721]  i915_emon_status+0x45/0xd0 [i915]
[22.756730]  seq_read+0xdb/0x3c0
[22.756736]  ? lockdep_hardirqs_off+0x94/0xd0
[22.756740]  ? __slab_free+0x24e/0x510
[22.756746]  full_proxy_read+0x52/0x90
[22.756752]  __vfs_read+0x31/0x170
[22.756759]  ? do_sys_open+0x13b/0x240
[22.756763]  ? rcu_read_lock_sched_held+0x6f/0x80
[22.756766]  vfs_read+0x9e/0x140
[22.756770]  ksys_read+0x50/0xc0
[22.756775]  do_syscall_64+0x55/0x190
[22.756781]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[22.756783] RIP: 0033:0x7f28781dc34e
[22.756786] Code: 00 00 00 00 48 8b 15 71 8c 20 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 0f 1f 40 00 8b 05 ba d0 20 00 85 c0 75 16 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5a f3 c3 0f 1f 84 00 00 00 00 00 41 54 55 49
[22.756787] RSP: 002b:00007ffd33fa0d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[22.756790] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f28781dc34e
[22.756792] RDX: 0000000000000200 RSI: 00007ffd33fa0d50 RDI: 0000000000000008
[22.756794] RBP: 00007ffd33fa0f60 R08: 0000000000000000 R09: 0000000000000020
[22.756796] R10: 0000000000000000 R11: 0000000000000246 R12: 00005638de45c2c0
[22.756797] R13: 00007ffd33fa14b0 R14: 0000000000000000 R15: 0000000000000000
[22.756806] irq event stamp: 47950
[22.756811] hardirqs last  enabled at (47949): [<ffffffff810fba74>] vprintk_emit+0x124/0x320
[22.756813] hardirqs last disabled at (47950): [<ffffffff810019b0>] trace_hardirqs_off_thunk+0x1a/0x1c
[22.756816] softirqs last  enabled at (47518): [<ffffffff81c0033a>] __do_softirq+0x33a/0x4b9
[22.756820] softirqs last disabled at (47479): [<ffffffff8108df29>] irq_exit+0xa9/0xc0
[22.756858] WARNING: CPU: 0 PID: 1058 at drivers/gpu/drm/i915/intel_drv.h:2104 gen5_read32+0x16b/0x1a0 [i915]
[22.756860] ---[ end trace bf56fa7d6a3cbf7a ]

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181119230101.32460-1-jose.souza@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-09-16 08:22:04 +02:00
..
accessibility
acpi ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id() 2019-08-16 10:12:48 +02:00
amba
android binder: fix possible UAF when freeing buffer 2019-08-04 09:30:53 +02:00
ata libata: add SG safety checks in SFF pio transfers 2019-08-29 08:28:45 +02:00
atm atm: iphase: Fix Spectre v1 vulnerability 2019-08-09 17:52:29 +02:00
auxdisplay auxdisplay: panel: need to delete scan_timer when misc_register fails in panel_attach 2019-09-06 10:21:56 +02:00
base drivers/base: Introduce kill_device() 2019-08-09 17:52:28 +02:00
bcma
block xen/blkback: fix memory leaks 2019-09-06 10:21:57 +02:00
bluetooth Bluetooth: btqca: Add a short delay before downloading the NVM 2019-09-10 10:33:43 +01:00
bus bus: hisi_lpc: Add .remove method to avoid driver unbind crash 2019-09-06 10:22:20 +02:00
cdrom cdrom: Fix race condition in cdrom_sysctl_register 2019-04-05 22:33:10 +02:00
char hpet: Fix division by zero in hpet_time_div() 2019-07-31 07:27:10 +02:00
clk clk: s2mps11: Add used attribute to s2mps11_dt_match 2019-09-16 08:21:45 +02:00
clocksource clocksource/drivers/exynos_mct: Increase priority over ARM arch timer 2019-07-26 09:14:12 +02:00
connector connector: fix unsafe usage of ->real_parent 2019-03-19 13:12:38 +01:00
cpufreq cpufreq/pasemi: fix use-after-free in pas_cpufreq_cpu_init() 2019-08-16 10:12:46 +02:00
cpuidle
crypto crypto: ccree - add missing inline qualifier 2019-09-16 08:22:03 +02:00
dax mm/huge_memory: fix vmf_insert_pfn_{pmd, pud}() crash, handle unaligned addresses 2019-05-22 07:37:40 +02:00
dca
devfreq
dio
dma omap-dma/omap_vout_vrfb: fix off-by-one fi value 2019-09-06 10:21:56 +02:00
dma-buf dma-buf: Discard old fence_excl on retrying get_fences_rcu for realloc 2019-07-28 08:29:28 +02:00
edac EDAC: Fix global-out-of-bounds write when setting edac_mc_poll_msec 2019-07-26 09:14:13 +02:00
eisa
extcon extcon: arizona: Disable mic detect if running when driver is removed 2019-05-31 06:46:23 -07:00
firewire
firmware iscsi_ibft: make ISCSI_IBFT dependson ACPI instead of ISCSI_IBFT_FIND 2019-08-16 10:12:45 +02:00
fmc
fpga fpga-manager: altera-ps-spi: Fix build error 2019-07-31 07:27:10 +02:00
fsi fsi: scom: Don't abort operations for minor errors 2019-09-06 10:22:19 +02:00
gnss gnss: sirf: fix premature wakeup interrupt enable 2019-03-10 07:17:21 +01:00
gpio gpiolib: never report open-drain/source lines as 'input' to user-space 2019-08-29 08:28:51 +02:00
gpu drm/i915/ilk: Fix warning when reading emon_status with no output 2019-09-16 08:22:04 +02:00
hid HID: cp2112: prevent sleeping function called from invalid context 2019-09-10 10:33:49 +01:00
hsi
hv Drivers: hv: kvp: Fix the recent regression caused by incorrect clean-up 2019-09-16 08:21:54 +02:00
hwmon hwmon: (nct7802) Fix wrong detection of in4 presence 2019-08-16 10:12:51 +02:00
hwspinlock
hwtracing intel_th: pci: Add Tiger Lake support 2019-09-06 10:22:18 +02:00
i2c i2c: piix4: Fix port selection for AMD Family 16h Model 30h 2019-09-06 10:22:23 +02:00
ide
idle x86/cpu: Sanitize FAM6_ATOM naming 2019-05-14 19:17:53 +02:00
iio iio: adc: max9611: Fix temperature reading in probe 2019-08-25 10:47:59 +02:00
infiniband IB/uverbs: Fix OOPs upon device disassociation 2019-09-16 08:22:03 +02:00
input Input: hyperv-keyboard: Use in-place iterator API in the channel callback 2019-09-10 10:33:49 +01:00
iommu iommu/dma: Handle SG length overflow better 2019-09-06 10:21:57 +02:00
ipack
irqchip irqchip/irq-imx-gpcv2: Forward irq type to parent 2019-08-25 10:47:53 +02:00
isdn isdn: hfcsusb: Fix mISDN driver crash caused by transfer buffer on the stack 2019-08-29 08:28:35 +02:00
leds leds: trigger: netdev: use memcpy in device_name_store 2019-05-04 09:20:22 +02:00
lightnvm lightnvm: pblk: fix freeing of merged pages 2019-07-26 09:14:09 +02:00
macintosh
mailbox mailbox: handle failed named mailbox channel request 2019-07-31 07:27:07 +02:00
mcb
md dm zoned: fix potential NULL dereference in dmz_do_reclaim() 2019-08-29 08:28:59 +02:00
media media: vim2m: only cancel work if it is for right context 2019-09-16 08:22:02 +02:00
memory memory: tegra: Fix integer overflow on tick value calculation 2019-05-25 18:23:32 +02:00
memstick memstick: Fix error cleanup path of memstick_init 2019-07-31 07:26:59 +02:00
message
mfd mfd: hi655x-pmic: Fix missing return value check for devm_regmap_init_mmio_clk 2019-07-31 07:27:03 +02:00
misc VMCI: Release resource if the work is already queued 2019-09-06 10:22:20 +02:00
mmc mmc: core: Fix init of SD cards reporting an invalid VDD range 2019-09-06 10:22:17 +02:00
mtd mtd: rawnand: micron: handle on-die "ECC-off" devices correctly 2019-08-06 19:06:54 +02:00
mux
net ravb: Fix use-after-free ravb_tstamp_skb 2019-09-10 10:33:48 +01:00
nfc st_nci_hci_connectivity_event_received: null check the allocation 2019-08-29 08:28:31 +02:00
ntb
nubus
nvdimm libnvdimm/bus: Fix wait_nvdimm_bus_probe_idle() ABBA deadlock 2019-08-09 17:52:28 +02:00
nvme nvme-fc: use separate work queue to avoid warning 2019-09-16 08:21:44 +02:00
nvmem nvmem: sunxi_sid: Support SID on A83T and H5 2019-06-15 11:54:07 +02:00
of of: overlay: set node fields from properties when add new overlay node 2019-06-09 09:17:24 +02:00
opp
oprofile
parisc parisc: Use implicit space register selection for loading the coherence index of I/O pdirs 2019-06-11 12:20:51 +02:00
parport parport: Fix mem leak in parport_register_dev_model 2019-06-25 11:35:55 +08:00
pci PCI: dwc: pci-dra7xx: Fix compilation when !CONFIG_GPIOLIB 2019-07-31 07:27:07 +02:00
pcmcia
perf drivers/perf: arm_pmu: Fix failure path in PM notifier 2019-08-06 19:06:55 +02:00
phy phy: renesas: rcar-gen2: Fix memory leak at error paths 2019-07-31 07:27:00 +02:00
pinctrl pinctrl: rockchip: fix leaked of_node references 2019-07-31 07:26:57 +02:00
platform platform/mellanox: mlxreg-hotplug: Add devm_free_irq call to remove flow 2019-07-10 09:53:38 +02:00
pnp
power power: supply: max14656: fix potential use-before-alloc 2019-06-15 11:54:09 +02:00
powercap x86/cpu: Sanitize FAM6_ATOM naming 2019-05-14 19:17:53 +02:00
pps drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl 2019-08-04 09:30:56 +02:00
ps3
ptp
pwm Revert "pwm: Set class for exported channels in sysfs" 2019-08-25 10:47:46 +02:00
rapidio drivers/rapidio/devices/rio_mport_cdev.c: NUL terminate some strings 2019-08-06 19:06:52 +02:00
ras RAS/CEC: Fix pfn insertion 2019-07-26 09:14:05 +02:00
regulator regulator: s2mps11: Fix buck7 and buck8 wrong voltages 2019-07-26 09:14:22 +02:00
remoteproc remoteproc: qcom: q6v5-mss: add SCM probe dependency 2019-09-16 08:21:48 +02:00
reset reset: meson-audio-arb: Fix missing .owner setting of reset_controller_dev 2019-05-08 07:21:47 +02:00
rpmsg
rtc rtc: pcf8523: don't return invalid date when battery is low 2019-06-19 08:18:07 +02:00
s390 s390/zcrypt: reinit ap queue state machine during device probe 2019-09-16 08:21:57 +02:00
sbus
scsi scsi: megaraid_sas: Use 63-bit DMA addressing 2019-09-16 08:22:00 +02:00
sfi
sh
siox
slimbus slimbus: fix a potential NULL pointer dereference in of_qcom_slim_ngd_register 2019-05-31 06:46:14 -07:00
sn
soc soc: bcm: brcmstb: biuctrl: Register writes require a barrier 2019-07-14 08:11:03 +02:00
soundwire soundwire: cadence_master: fix definitions for INTSTAT0/1 2019-09-06 10:21:56 +02:00
spi spi: bcm2835aux: fix corruptions for longer spi transfers 2019-09-10 10:33:41 +01:00
spmi
ssb ssb: Fix possible NULL pointer dereference in ssb_host_pcmcia_exit 2019-05-31 06:46:04 -07:00
staging staging: comedi: dt3000: Fix rounding up of timer divisor 2019-08-25 10:47:59 +02:00
target scsi: target: tcmu: avoid use-after-free after command timeout 2019-09-10 10:33:45 +01:00
tc
tee
thermal drivers: thermal: tsens: Don't print error message on -EPROBE_DEFER 2019-06-15 11:54:02 +02:00
thunderbolt thunderbolt: property: Fix a NULL pointer dereference 2019-05-31 06:46:31 -07:00
tty tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop 2019-08-16 10:12:50 +02:00
uio
usb typec: tcpm: fix a typo in the comparison of pdo_max_voltage 2019-09-06 10:22:18 +02:00
uwb
vfio vfio: Fix WARNING "do not call blocking ops when !TASK_RUNNING" 2019-06-15 11:54:07 +02:00
vhost vhost/test: fix build for vhost test - again 2019-09-16 08:21:40 +02:00
video video: imsttfb: fix potential NULL pointer dereferences 2019-06-15 11:54:10 +02:00
virt drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl 2019-05-16 19:41:31 +02:00
virtio virtio_pci: fix a NULL pointer reference in vp_del_vqs 2019-05-10 17:54:08 +02:00
visorbus
vlynq
vme
w1 w1: fix the resume command API 2019-05-31 06:46:14 -07:00
watchdog watchdog: bcm2835_wdt: Fix module autoload 2019-09-06 10:22:02 +02:00
xen xen/pciback: remove set but not used variable 'old_state' 2019-08-25 10:47:52 +02:00
zorro
Kconfig
Makefile