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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fpu updates from Ingo Molnar:
"Misc changes:
- add a pkey sanity check
- three commits to improve and future-proof xstate/xfeature handling
some more"
* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pkeys: Add check for pkey "overflow"
x86/fpu/xstate: Warn when checking alignment of disabled xfeatures
x86/fpu/xstate: Fix XSAVES offsets in setup_xstate_comp()
x86/fpu/xstate: Fix last_good_offset in setup_xstate_features()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar:
"This topic tree contains more commits than usual:
- most of it are uaccess cleanups/reorganization by Al
- there's a bunch of prototype declaration (--Wmissing-prototypes)
cleanups
- misc other cleanups all around the map"
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
x86/mm/set_memory: Fix -Wmissing-prototypes warnings
x86/efi: Add a prototype for efi_arch_mem_reserve()
x86/mm: Mark setup_emu2phys_nid() static
x86/jump_label: Move 'inline' keyword placement
x86/platform/uv: Add a missing prototype for uv_bau_message_interrupt()
kill uaccess_try()
x86: unsafe_put-style macro for sigmask
x86: x32_setup_rt_frame(): consolidate uaccess areas
x86: __setup_rt_frame(): consolidate uaccess areas
x86: __setup_frame(): consolidate uaccess areas
x86: setup_sigcontext(): list user_access_{begin,end}() into callers
x86: get rid of put_user_try in __setup_rt_frame() (both 32bit and 64bit)
x86: ia32_setup_rt_frame(): consolidate uaccess areas
x86: ia32_setup_frame(): consolidate uaccess areas
x86: ia32_setup_sigcontext(): lift user_access_{begin,end}() into the callers
x86/alternatives: Mark text_poke_loc_init() static
x86/cpu: Fix a -Wmissing-prototypes warning for init_ia32_feat_ctl()
x86/mm: Drop pud_mknotpresent()
x86: Replace setup_irq() by request_irq()
x86/configs: Slightly reduce defconfigs
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 build updates from Ingo Molnar:
"A handful of updates: two linker script cleanups and a stock
defconfig+allmodconfig bootability fix"
* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/vdso: Discard .note.gnu.property sections in vDSO
x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS
x86/Kconfig: Make CMDLINE_OVERRIDE depend on non-empty CMDLINE
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
"Misc cleanups and small enhancements all around the map"
* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot/compressed: Fix debug_puthex() parameter type
x86/setup: Fix static memory detection
x86/vmlinux: Drop unneeded linker script discard of .eh_frame
x86/*/Makefile: Use -fno-asynchronous-unwind-tables to suppress .eh_frame sections
x86/boot/compressed: Remove .eh_frame section from bzImage
x86/boot/compressed/64: Remove .bss/.pgtable from bzImage
x86/boot/compressed/64: Use 32-bit (zero-extended) MOV for z_output_len
x86/boot/compressed/64: Use LEA to initialize boot stack pointer
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In case memory resources for buf were allocated, release them before
return.
Addresses-Coverity-ID: 1492011 ("Resource leak")
Fixes: a7a29f9c361f ("net: ipv6: add rpl sr tunnel")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Included nic tls statistics in ethtool stats.
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix an oops in dsa_port_phylink_mac_change() caused by a combination
of a20f997010c4 ("net: dsa: Don't instantiate phylink for CPU/DSA
ports unless needed") and the net-dsa-improve-serdes-integration
series of patches 65b7a2c8e369 ("Merge branch
'net-dsa-improve-serdes-integration'").
Unable to handle kernel NULL pointer dereference at virtual address 00000124
pgd = c0004000
[00000124] *pgd=00000000
Internal error: Oops: 805 [#1] SMP ARM
Modules linked in: tag_edsa spi_nor mtd xhci_plat_hcd mv88e6xxx(+) xhci_hcd armada_thermal marvell_cesa dsa_core ehci_orion libdes phy_armada38x_comphy at24 mcp3021 sfp evbug spi_orion sff mdio_i2c
CPU: 1 PID: 214 Comm: irq/55-mv88e6xx Not tainted 5.6.0+ #470
Hardware name: Marvell Armada 380/385 (Device Tree)
PC is at phylink_mac_change+0x10/0x88
LR is at mv88e6352_serdes_irq_status+0x74/0x94 [mv88e6xxx]
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A testing message was brought by 13d0f7b814d9 ("net/bpfilter: fix dprintf
usage for /dev/kmsg") but should've been deleted before patch submission.
Although it doesn't cause any harm to the code or functionality itself, it's
totally unpleasant to have it displayed on every loop iteration with no real
use case. Thus remove it unconditionally.
Fixes: 13d0f7b814d9 ("net/bpfilter: fix dprintf usage for /dev/kmsg")
Signed-off-by: Bruno Meneguele <bmeneg@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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fixed-link nodes are treated as PHY nodes by of_mdiobus_child_is_phy().
We must check if the interface is a fixed-link before looking up for PHY
nodes.
Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Tested-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
"The bulk is in-kernel pointer authentication, activity monitors and
lots of asm symbol annotations. I also queued the sys_mremap() patch
commenting the asymmetry in the address untagging.
Summary:
- In-kernel Pointer Authentication support (previously only offered
to user space).
- ARM Activity Monitors (AMU) extension support allowing better CPU
utilisation numbers for the scheduler (frequency invariance).
- Memory hot-remove support for arm64.
- Lots of asm annotations (SYM_*) in preparation for the in-kernel
Branch Target Identification (BTI) support.
- arm64 perf updates: ARMv8.5-PMU 64-bit counters, refactoring the
PMU init callbacks, support for new DT compatibles.
- IPv6 header checksum optimisation.
- Fixes: SDEI (software delegated exception interface) double-lock on
hibernate with shared events.
- Minor clean-ups and refactoring: cpu_ops accessor,
cpu_do_switch_mm() converted to C, cpufeature finalisation helper.
- sys_mremap() comment explaining the asymmetric address untagging
behaviour"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (81 commits)
mm/mremap: Add comment explaining the untagging behaviour of mremap()
arm64: head: Convert install_el2_stub to SYM_INNER_LABEL
arm64: Introduce get_cpu_ops() helper function
arm64: Rename cpu_read_ops() to init_cpu_ops()
arm64: Declare ACPI parking protocol CPU operation if needed
arm64: move kimage_vaddr to .rodata
arm64: use mov_q instead of literal ldr
arm64: Kconfig: verify binutils support for ARM64_PTR_AUTH
lkdtm: arm64: test kernel pointer authentication
arm64: compile the kernel with ptrauth return address signing
kconfig: Add support for 'as-option'
arm64: suspend: restore the kernel ptrauth keys
arm64: __show_regs: strip PAC from lr in printk
arm64: unwind: strip PAC from kernel addresses
arm64: mask PAC bits of __builtin_return_address
arm64: initialize ptrauth keys for kernel booting task
arm64: initialize and switch ptrauth kernel keys
arm64: enable ptrauth earlier
arm64: cpufeature: handle conflicts based on capability
arm64: cpufeature: Move cpu capability helpers inside C file
...
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KSZ protocol tag is needed by the KSZ DSA drivers.
Fixes: 0b9f9dfbfab4 ("dsa: Allow tag drivers to be built as modules")
Tested-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull microblaze updates from Michal Simek:
- convert license headers to SPDX
- cleanup header handling and use asm-generic one
- get rid of earlyprintk residues
- define barriers and use it in the code
- get rid of setup_irq() for timer
- various small addons and fixes
* tag 'microblaze-v5.7-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Replace setup_irq() by request_irq()
microblaze: Stop printing the virtual memory layout
microblaze: Use asm generic cmpxchg.h for !SMP case
microblaze: Define percpu sestion in linker file
microblaze: Remove unused boot_cpuid variable
microblaze: Add missing irqflags.h header
microblaze: Add sync to tlb operations
microblaze: Define microblaze barrier
microblaze: Remove empty headers
microblaze: Remove early printk setup
microblaze: Remove architecture tlb.h and use generic one
microblaze: Convert headers to SPDX license
microblaze: Fix _reset() function
microblaze: Kernel parameters should be parsed earlier
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There are a few space characters I found by chance. I think they are
redundant, so I removed them.
Signed-off-by: Hu Haowen <xianfengting221@163.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
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[Why]
Some displays have an issue where the hdcp chips are initialized after the
display has already lit up. This means we can sometimes authentication too early
and cause authentication failures.
This happens when HDCP is enabled and the display is power cycled. Normally we
will authenticate 2 seconds after the display is lit, but some displays need a
bit more time.
[How]
Increase delay to 3 second before we start authentication.
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
-We need to cancel future callbacks/watchdogs events when a callback/watchdog event happens
[How]
-fix typo in event_callback()
-cancel callback, not watchdog
-cancel watchdog events in event_watchdog_timer().
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
When content type property is set to 1. We should enable hdcp2.2 and if we cant
then stop. Currently the way it works in DC is that if we fail hdcp2, we will
try hdcp1 after.
[How]
Use link config to force disable hdcp1.4 when type1 is set.
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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This is ASIC specific and should be placed in _ppt.c of each ASIC.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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This is already done in soc15.c. And this is really ASIC specific
and should not be placed here.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
DML expects num_states to exclude the duplicate state.
[How]
Set num_states to correct value to prevent array off-by-one error. Also
refactor max clock level code for diags.
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
BT2020 is not supported in COLOR_ENCODING property of planes. Only
BT601 and BT709 was available.
[How]
Allow BT2020 as legit value in setting COLOR_ENCODING property.
Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
Nominal pixel clock and EDID information differ in precision so although
monitor reports maximum refresh is 2x minimum, LFC was not being
enabled.
[How]
Use minimum refresh rate as nominal/2 when EDID dictates that min
refresh = max refresh/2.
v2: squash in 64 bit divide fix
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
CTM was only supported at CRTC level and we need color space conversion
in linear space at plane level.
[How]
- Add plane-level CTM to dc interface
- Program plane-level CTM in DCN
Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
Change is causing a regression where the OPC app no longer functions
properly.
[How]
Revert the changelist causing the issue.
Signed-off-by: Isabel Zhang <isabel.zhang@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
In some scenario like 1366x768 VSR enabled connected with a 4K monitor
and playing 4K video in clone mode, underflow will be observed due to
decrease dppclk when previouse surface scan isn't finished
[How]
In this use case, surface flip is switching between 4K and 1366x768,
1366x768 needs smaller dppclk, and when decrease the clk and previous
surface scan is for 4K and scan isn't done, underflow will happen. Not
doing optimize bandwidth in case of flip pending.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
For some monitors extreme flickering can occur while using LFC for if
we're not doing the DRR timing update for V_TOTAL_MIN / V_TOTAL_MAX at
the DP start of frame.
Hardware can default to any time in the frame which isn't the behavior
we want.
[How]
Add a new function for setting the double buffering mode for DRR timing.
Default to DP start of frame double buffering on timing generator init.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
P010 pixel format is not declared as supported in DRM and DM.
[How]
Add P010 format to the support list presented to DRM and checked in DM
Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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[Why]
Diagnostics scaling test failing to set required number of vertical taps
in 4:2:0 surface case
[How]
In dpp3_get_optimal_number_of_taps() need to use LB_MEMORY_CONFIG_3 for
4:2:0 surface case. In resource_build_scaling_params() make sure to also
set plane res alpha enable based on updated surface state
Signed-off-by: Eric Bernstein <eric.bernstein@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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the HPD bo size calculation error.
the "mem.size" can't present actual BO size all time.
Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <Christian.Koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
Pull ia64 updates from Tony Luck:
"Couple of cleanup patches"
* tag 'please-pull-ia64_for_5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
tty/serial: cleanup after ioc*_serial driver removal
ia64: replace setup_irq() by request_irq()
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into drm-intel-next-fixes
gvt-next-fixes-2020-03-31
- Fix non-privilege access warning (Tina)
- Fix display port type (Tina)
- BDW cmd parser missed SWTESS_BASE_ADDRESS (Yan)
- Bypass length check of LRI (Yan)
- Fix one klocwork warning (Tina)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200331070025.GB16629@zhen-hp.sh.intel.com
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Support the gcov function in csky architecture.
Signed-off-by: Ma Jun <majun258@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
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We should get psr value from regs->psr in stack, not directly get
it from phyiscal register then save the vector number in
tsk->trap_no.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
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Update kselftest help information.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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Pull MIPS updates from Thomas Bogendoerfer:
- loongson64 irq rework
- dmi support loongson
- replace setup_irq() by request_irq()
- jazz cleanups
- minor cleanups and fixes
* tag 'mips_5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (44 commits)
MIPS: ralink: mt7621: Fix soc_device introduction
MIPS: Exclude more dsemul code when CONFIG_MIPS_FP_SUPPORT=n
MIPS/tlbex: Fix LDDIR usage in setup_pw() for Loongson-3
MIPS: do not compile generic functions for CONFIG_CAVIUM_OCTEON_SOC
MAINTAINERS: Update Loongson64 entry
MIPS: Loongson64: Load built-in dtbs
MIPS: Loongson64: Add generic dts
dt-bindings: mips: Add loongson boards
MIPS: Loongson64: Drop legacy IRQ code
dt-bindings: interrupt-controller: Add Loongson-3 HTPIC
irqchip: Add driver for Loongson-3 HyperTransport PIC controller
dt-bindings: interrupt-controller: Add Loongson LIOINTC
irqchip: loongson-liointc: Workaround LPC IRQ Errata
irqchip: Add driver for Loongson I/O Local Interrupt Controller
docs: mips: remove no longer needed au1xxx_ide.rst documentation
MIPS: Alchemy: remove no longer used au1xxx_ide.h header
ide: remove no longer used au1xxx-ide driver
MIPS: Add support for Desktop Management Interface (DMI)
firmware: dmi: Add macro SMBIOS_ENTRY_POINT_SCAN_START
MIPS: ralink: mt7621: introduce 'soc_device' initialization
...
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven:
- pagetable layout rewrite, to facilitate global READ_ONCE() rework
- Zorro (Amiga) and DIO (HP 9000/300) bus cleanups
- defconfig updates
- minor cleanups and fixes
* tag 'm68k-for-v5.7-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: (23 commits)
m68k: defconfig: Update defconfigs for v5.6-rc4
zorro: Replace zero-length array with flexible-array member
m68k: Switch to asm-generic/hardirq.h
fbdev: c2p: Use BUILD_BUG() instead of custom solution
dio: Remove unused dio_dev_driver()
dio: Fix dio_bus_match() kerneldoc
dio: Make dio_match_device() static
zorro: Move zorro_bus_type to bus-private header file
zorro: Remove unused zorro_dev_driver()
zorro: Use zorro_match_device() helper in zorro_bus_match()
zorro: Fix zorro_bus_match() kerneldoc
zorro: Make zorro_match_device() static
m68k: Fix Kconfig indentation
m68k: mm: Change ColdFire pgtable_t
m68k: mm: Fully initialize the page-table allocator
m68k: mm: Extend table allocator for multiple sizes
m68k: mm: Use table allocator for pgtables
m68k: mm: Improve kernel_page_table()
m68k: mm: Restructure Motorola MMU page-table layout
m68k: mm: Move the pointer table allocator to motorola.c
...
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This reverts commit 7be1b9b8e9d1e9ef0342d2e001f44eec4030aa4d.
The drm_mm is supposed to work in atomic context, so calling schedule()
or in this case cond_resched() is illegal.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/359278/
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The pointer is not really needed anymore since we have the timings
struct available in the function itself now. Remove the pointer and
access the struct directly.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Without this commit, a PCIe hotplug port can stop generating interrupts on
hotplug events, so device adds and removals will not be seen:
The pciehp interrupt handler pciehp_isr() reads the Slot Status register
and then writes back to it to clear the bits that caused the interrupt. If
a different interrupt event bit gets set between the read and the write,
pciehp_isr() returns without having cleared all of the interrupt event
bits. If this happens when the MSI isn't masked (which by default it isn't
in handle_edge_irq(), and which it will never be when MSI per-vector
masking is not supported), we won't get any more hotplug interrupts from
that device.
That is expected behavior, according to the PCIe Base Spec r5.0, section
6.7.3.4, "Software Notification of Hot-Plug Events".
Because the Presence Detect Changed and Data Link Layer State Changed event
bits can both get set at nearly the same time when a device is added or
removed, this is more likely to happen than it might seem. The issue was
found (and can be reproduced rather easily) by connecting and disconnecting
an NVMe storage device on at least one system model where the NVMe devices
were being connected to an AMD PCIe port (PCI device 0x1022/0x1483).
Fix the issue by modifying pciehp_isr() to loop back and re-read the Slot
Status register immediately after writing to it, until it sees that all of
the event status bits have been cleared.
[lukas: drop loop count limitation, write "events" instead of "status",
don't loop back in INTx and poll modes, tweak code comment & commit msg]
Link: https://lore.kernel.org/r/78b4ced5072bfe6e369d20e8b47c279b8c7af12e.1582121613.git.lukas@wunner.de
Tested-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
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David Hoyer reports that powering pciehp slots up or down via sysfs may
hang: The call to wait_event() in pciehp_sysfs_enable_slot() and
_disable_slot() does not return because ctrl->ist_running remains true.
This flag, which was introduced by commit 157c1062fcd8 ("PCI: pciehp: Avoid
returning prematurely from sysfs requests"), signifies that the IRQ thread
pciehp_ist() is running. It is set to true at the top of pciehp_ist() and
reset to false at the end. However there are two additional return
statements in pciehp_ist() before which the commit neglected to reset the
flag to false and wake up waiters for the flag.
That omission opens up the following race when powering up the slot:
* pciehp_ist() runs because a PCI_EXP_SLTSTA_PDC event was requested
by pciehp_sysfs_enable_slot()
* pciehp_ist() turns on slot power via the following call stack:
pciehp_handle_presence_or_link_change() -> pciehp_enable_slot() ->
__pciehp_enable_slot() -> board_added() -> pciehp_power_on_slot()
* after slot power is turned on, the link comes up, resulting in a
PCI_EXP_SLTSTA_DLLSC event
* the IRQ handler pciehp_isr() stores the event in ctrl->pending_events
and returns IRQ_WAKE_THREAD
* the IRQ thread is already woken (it's bringing up the slot), but the
genirq code remembers to re-run the IRQ thread after it has finished
(such that it can deal with the new event) by setting IRQTF_RUNTHREAD
via __handle_irq_event_percpu() -> __irq_wake_thread()
* the IRQ thread removes PCI_EXP_SLTSTA_DLLSC from ctrl->pending_events
via board_added() -> pciehp_check_link_status() in order to deal with
presence and link flaps per commit 6c35a1ac3da6 ("PCI: pciehp:
Tolerate initially unstable link")
* after pciehp_ist() has successfully brought up the slot, it resets
ctrl->ist_running to false and wakes up the sysfs requester
* the genirq code re-runs pciehp_ist(), which sets ctrl->ist_running
to true but then returns with IRQ_NONE because ctrl->pending_events
is empty
* pciehp_sysfs_enable_slot() is finally woken but notices that
ctrl->ist_running is true, hence continues waiting
The only way to get the hung task going again is to trigger a hotplug
event which brings down the slot, e.g. by yanking out the card.
The same race exists when powering down the slot because remove_board()
likewise clears link or presence changes in ctrl->pending_events per commit
3943af9d01e9 ("PCI: pciehp: Ignore Link State Changes after powering off a
slot") and thereby may cause a re-run of pciehp_ist() which returns with
IRQ_NONE without resetting ctrl->ist_running to false.
Fix by adding a goto label before the teardown steps at the end of
pciehp_ist() and jumping to that label from the two return statements which
currently neglect to reset the ctrl->ist_running flag.
Fixes: 157c1062fcd8 ("PCI: pciehp: Avoid returning prematurely from sysfs requests")
Link: https://lore.kernel.org/r/cca1effa488065cb055120aa01b65719094bdcb5.1584530321.git.lukas@wunner.de
Reported-by: David Hoyer <David.Hoyer@netapp.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Cc: stable@vger.kernel.org # v4.19+
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Fix a static code checker warning:
drivers/gpu/drm/xen/xen_drm_front.c:404 xen_drm_drv_dumb_create()
warn: passing zero to 'PTR_ERR'
Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1585562347-30214-1-git-send-email-dingxiang@cmss.chinamobile.com
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Topwise Communication Co,. Ltd. is a company based in Shenzhen. They
manufacture all kind of products but seem to be focusing on POS nowadays.
Signed-off-by: Pascal Roeleven <dev@pascalroeleven.nl>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rob Herring <robh@kernel.org>
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The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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The old file was converted to yaml, but its reference was
still pointing to the old one.
Fixes: 7cef1079e3ad ("dt-bindings: input: Add common input binding in json-schema")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
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ap806-system-controller.txt was renamed to ap80x-system-controller.txt.
Update its references accordingly.
Fixes: 2537831bbc19 ("dt-bindings: ap80x: replace AP806 with AP80x")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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This file was converted to json and renamed. Update its
references accordingly.
Fixes: 824674b59f72 ("dt-bindings: net: can: Convert M_CAN to json-schema")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Rob Herring <robh@kernel.org>
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All R-Car Gen2 SoCs have a Renesas Timer Pulse Unit.
Document support for the missing variants.
No driver change is needed due to the fallback compatible string.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Some Chrome OS devices with Embedded Controllers (EC) can read and
modify Type C port state.
Add an entry in the DT Bindings documentation that lists out the logical
device and describes the relevant port information, to be used by the
corresponding driver.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rob Herring <robh@kernel.org>
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The preferred form for gpio-leds compatible subnodes is:
^led-[0-9a-f]$
Fix example by changing led0 and led1 to led-0 and led-1.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rob Herring <robh@kernel.org>
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The base address of msi-controller@c should be set to c.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Add documentation for the interconnect and interconnect-names
properties for QSPI.
Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Signed-off-by: Rob Herring <robh@kernel.org>
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