mainlining shenanigans
436afdfa35
amdgpu_detect_virtualization reads register, amdgpu_device_rreg access
adev->reset_domain->sem if kernel defined CONFIG_LOCKDEP, below is the
random boot hang backtrace on Vega10. It may get random NULL pointer
access backtrace if amdgpu_sriov_runtime is true too.
Move amdgpu_reset_create_reset_domain before calling to RREG32.
BUG: kernel NULL pointer dereference, address:
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
Workqueue: events work_for_cpu_fn
RIP: 0010:down_read_trylock+0x13/0xf0
Call Trace:
<TASK>
amdgpu_device_skip_hw_access+0x38/0x80 [amdgpu]
amdgpu_device_rreg+0x1b/0x170 [amdgpu]
amdgpu_detect_virtualization+0x73/0x100 [amdgpu]
amdgpu_device_init.cold.60+0xbe/0x16b1 [amdgpu]
? pci_bus_read_config_word+0x43/0x70
amdgpu_driver_load_kms+0x15/0x120 [amdgpu]
amdgpu_pci_probe+0x1a1/0x3a0 [amdgpu]
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.