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8783a18409
when removing the amdgpu module and reinserting it, a call trace is triggered: [ 334.230602] RIP: 0010:hubbub2_get_dchub_ref_freq+0xbb/0xe0 [amdgpu] [ 334.230807] Code: 25 28 00 00 00 75 3c 48 8d 65 f0 5b 41 5c 5d 31 c0 31 d2 31 c9 31 f6 31 ff 45 31 c0 45 31 c9 45 31 d2 45 31 db e9 55 a1 ca de <0f> 0b eb c6 0f 0b eb c2 d1 eb 8d 83 c0 63 ff ff 3d 20 4e 00 00 76 [ 334.230809] RSP: 0018:ffffbc8b823fb540 EFLAGS: 00010246 [ 334.230811] RAX: 0000000000001000 RBX: 00000000000186a0 RCX: 0000000000000000 [ 334.230812] RDX: ffffbc8b823fb544 RSI: 0000000000000000 RDI: 0000000000000000 [ 334.230813] RBP: ffffbc8b823fb560 R08: 0000000000000000 R09: 0000000000000000 [ 334.230814] R10: 0000000000000000 R11: 000000000000000f R12: ffff9e644f1f2bb0 [ 334.230815] R13: ffff9e6451361300 R14: 0000000000000000 R15: ffff9e6452c00000 [ 334.230816] FS: 00007af7c8519000(0000) GS:ffff9e737dd00000(0000) knlGS:0000000000000000 [ 334.230817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 334.230818] CR2: 0000703576b9cbd0 CR3: 00000001095a2000 CR4: 0000000000750ee0 [ 334.230819] PKRU: 55555554 [ 334.230820] Call Trace: [ 334.230822] <TASK> [ 334.230824] ? show_regs+0x6d/0x80 [ 334.230828] ? __warn+0x89/0x160 [ 334.230832] ? hubbub2_get_dchub_ref_freq+0xbb/0xe0 [amdgpu] [ 334.231024] ? report_bug+0x17e/0x1b0 [ 334.231028] ? handle_bug+0x46/0x90 [ 334.231030] ? exc_invalid_op+0x18/0x80 [ 334.231032] ? asm_exc_invalid_op+0x1b/0x20 [ 334.231036] ? hubbub2_get_dchub_ref_freq+0xbb/0xe0 [amdgpu] [ 334.231217] dc_create_resource_pool+0xfd/0x320 [amdgpu] [ 334.231408] dc_create+0x256/0x700 [amdgpu] [ 334.231588] ? srso_alias_return_thunk+0x5/0x7f [ 334.231590] ? dmi_matches+0xa0/0x230 [ 334.231594] amdgpu_dm_init+0x28c/0x25f0 [amdgpu] [ 334.231791] ? prb_read_valid+0x1c/0x30 [ 334.231795] ? __irq_work_queue_local+0x43/0xf0 [ 334.231798] ? srso_alias_return_thunk+0x5/0x7f [ 334.231800] ? irq_work_queue+0x2f/0x70 [ 334.231802] ? srso_alias_return_thunk+0x5/0x7f [ 334.231803] ? __wake_up_klogd.part.0+0x40/0x70 [ 334.231805] ? srso_alias_return_thunk+0x5/0x7f [ 334.231807] ? vprintk_emit+0xd9/0x210 [ 334.231809] ? set_dev_info+0x130/0x1c0 [ 334.231812] ? srso_alias_return_thunk+0x5/0x7f [ 334.231813] ? dev_printk_emit+0xa1/0xe0 [ 334.231819] dm_hw_init+0x14/0x30 [amdgpu] [ 334.231993] amdgpu_device_init+0x23c7/0x2fc0 [amdgpu] [ 334.232134] ? pci_read_config_word+0x25/0x50 [ 334.232139] amdgpu_driver_load_kms+0x1a/0xd0 [amdgpu] [ 334.232284] amdgpu_pci_probe+0x1f9/0x620 [amdgpu] On DCN401, get_dchub_ref_freq() hook is called before init_hw() hook. Hence, it is expected to trigger an assert. Remove the extraneous call to get_dchub_ref_freq() to suppress the call trace Reviewed-by: Alvin Lee <alvin.lee2@amd.com> Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com> Signed-off-by: Roman Li <roman.li@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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 reStructuredText 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.