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Daniel Gomez 91954c6c90 drm/amd/display: Fix mutex lock in dcn10 Removal of DC_FP_* wrappers from dml (`9696679bf7`) provokes a mutex lock [2] on the amdgpu driver. Re-arrange the dcn10 code to avoid locking the mutex by placing the DC_FP_* wrappers around the proper functions. This fixes the following WARN/stacktrace: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:283 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 227, name: systemd-udevd preempt_count: 1, expected: 0 CPU: 4 PID: 227 Comm: systemd-udevd Not tainted 6.0.0-rc6-qtec-standard #2 Hardware name: Qtechnology A/S QT5222/QT5221, BIOS v1.0.1 06/07/2021 Call Trace: <TASK> dump_stack_lvl+0x33/0x42 __might_resched.cold.172+0xa5/0xb3 mutex_lock+0x1a/0x40 amdgpu_dpm_get_clock_by_type_with_voltage+0x38/0x70 [amdgpu] dm_pp_get_clock_levels_by_type_with_voltage+0x64/0xa0 [amdgpu] dcn_bw_update_from_pplib+0x70/0x340 [amdgpu] dcn10_create_resource_pool+0x8c8/0xd20 [amdgpu] ? __kmalloc+0x1c7/0x4a0 dc_create_resource_pool+0xe7/0x190 [amdgpu] dc_create+0x212/0x5d0 [amdgpu] amdgpu_dm_init+0x246/0x370 [amdgpu] ? schedule_hrtimeout_range_clock+0x93/0x120 ? phm_wait_for_register_unequal.part.1+0x4a/0x80 [amdgpu] dm_hw_init+0xe/0x20 [amdgpu] amdgpu_device_init.cold.56+0x1324/0x1653 [amdgpu] ? pci_bus_read_config_word+0x43/0x80 amdgpu_driver_load_kms+0x15/0x120 [amdgpu] amdgpu_pci_probe+0x116/0x320 [amdgpu] pci_device_probe+0x97/0x110 really_probe+0xdd/0x340 __driver_probe_device+0x80/0x170 driver_probe_device+0x1f/0x90 __driver_attach+0xdc/0x180 ? __device_attach_driver+0x100/0x100 ? __device_attach_driver+0x100/0x100 bus_for_each_dev+0x74/0xc0 bus_add_driver+0x19e/0x210 ? kset_find_obj+0x30/0xa0 ? 0xffffffffa0a5b000 driver_register+0x6b/0xc0 ? 0xffffffffa0a5b000 do_one_initcall+0x4a/0x1f0 ? __vunmap+0x28e/0x2f0 ? __cond_resched+0x15/0x30 ? kmem_cache_alloc_trace+0x3d/0x440 do_init_module+0x4a/0x1e0 load_module+0x1cba/0x1e10 ? __do_sys_finit_module+0xb7/0x120 __do_sys_finit_module+0xb7/0x120 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff2b5f5422d Code: 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 ab 0e 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc44ab28e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 0000555c566a9240 RCX: 00007ff2b5f5422d RDX: 0000000000000000 RSI: 00007ff2b60bb353 RDI: 0000000000000019 RBP: 00007ff2b60bb353 R08: 0000000000000000 R09: 0000555c566a9240 R10: 0000000000000019 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000020000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Fixes: `9696679bf7` ("drm/amd/display: remove DC_FP_* wrapper from dml folder") Reviewed-by: Hamza Mahfooz <hamza.mahfooz@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Daniel Gomez <daniel@qtec.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>		2022-10-06 11:54:35 -04:00
arch	Misc irqchip fixes: LoongArch driver fixes and a Hyper-V IOMMU fix.	2022-08-21 15:09:55 -07:00
block	block-6.0-2022-08-19	2022-08-20 10:17:05 -07:00
certs	Kbuild updates for v5.20	2022-08-10 10:40:41 -07:00
crypto	crypto: blake2b: effectively disable frame size warning	2022-08-10 17:59:11 -07:00
Documentation	drm-misc-next for v6.1:	2022-10-04 09:29:25 +10:00
drivers	drm/amd/display: Fix mutex lock in dcn10	2022-10-06 11:54:35 -04:00
fs	5 cifs/smb3 fixes, one for stable	2022-08-21 10:21:16 -07:00
include	Merge tag 'amd-drm-next-6.1-2022-09-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-next	2022-09-28 14:56:09 +10:00
init	asm goto: eradicate CC_HAS_ASM_GOTO	2022-08-21 10:06:28 -07:00
io_uring	io_uring/net: use right helpers for async_data	2022-08-18 07:27:20 -06:00
ipc	Updates to various subsystems which I help look after. lib, ocfs2,	2022-08-07 10:03:24 -07:00
kernel	Various fixes for tracing:	2022-08-21 14:49:42 -07:00
lib	lib/cpumask: drop always-true preprocessor guard	2022-08-15 11:00:44 -07:00
LICENSES
mm	- hugetlb_vmemmap cleanups from Muchun Song	2022-08-10 11:18:00 -07:00
net	tcp: handle pure FIN case correctly	2022-08-18 11:04:56 -07:00
samples	Tracing updates for 5.20 / 6.0	2022-08-05 09:41:12 -07:00
scripts	asm goto: eradicate CC_HAS_ASM_GOTO	2022-08-21 10:06:28 -07:00
security	hardening fixes for v6.0-rc2	2022-08-19 13:56:14 -07:00
sound	sound fixes for 6.0-rc2	2022-08-19 09:46:11 -07:00
tools	asm goto: eradicate CC_HAS_ASM_GOTO	2022-08-21 10:06:28 -07:00
usr
virt	KVM: Drop unnecessary initialization of "ops" in kvm_ioctl_create_device()	2022-08-19 04:05:43 -04:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap	Updates to various subsystems which I help look after. lib, ocfs2,	2022-08-07 10:03:24 -07:00
COPYING
CREDITS	drm for 5.20/6.0	2022-08-03 19:52:08 -07:00
Kbuild
Kconfig
MAINTAINERS	Immutable backlight-detect-refactor branch between acpi, drm-* and pdx86	2022-09-14 12:27:10 +01:00
Makefile	Linux 6.0-rc2	2022-08-21 17:32:54 -07:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.