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No description
c7bb120c1c
Use atomic readl_poll_timeout_atomic, because msdc_reset_hw
may be invoked in IRQ handler in the following context:
msdc_irq() -> msdc_cmd_done() -> msdc_reset_hw()
The following kernel BUG stack trace can be observed on
Genio 1200 EVK after initializing MSDC1 hardware during kernel boot:
[ 1.187441] BUG: scheduling while atomic: swapper/0/0/0x00010002
[ 1.189157] Modules linked in:
[ 1.204633] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.15.42-mtk+modified #1
[ 1.205713] Hardware name: MediaTek Genio 1200 EVK-P1V2-EMMC (DT)
[ 1.206484] Call trace:
[ 1.206796] dump_backtrace+0x0/0x1ac
[ 1.207266] show_stack+0x24/0x30
[ 1.207692] dump_stack_lvl+0x68/0x84
[ 1.208162] dump_stack+0x1c/0x38
[ 1.208587] __schedule_bug+0x68/0x80
[ 1.209056] __schedule+0x6ec/0x7c0
[ 1.209502] schedule+0x7c/0x110
[ 1.209915] schedule_hrtimeout_range_clock+0xc4/0x1f0
[ 1.210569] schedule_hrtimeout_range+0x20/0x30
[ 1.211148] usleep_range_state+0x84/0xc0
[ 1.211661] msdc_reset_hw+0xc8/0x1b0
[ 1.212134] msdc_cmd_done.isra.0+0x4ac/0x5f0
[ 1.212693] msdc_irq+0x104/0x2d4
[ 1.213121] __handle_irq_event_percpu+0x68/0x280
[ 1.213725] handle_irq_event+0x70/0x15c
[ 1.214230] handle_fasteoi_irq+0xb0/0x1a4
[ 1.214755] handle_domain_irq+0x6c/0x9c
[ 1.215260] gic_handle_irq+0xc4/0x180
[ 1.215741] call_on_irq_stack+0x2c/0x54
[ 1.216245] do_interrupt_handler+0x5c/0x70
[ 1.216782] el1_interrupt+0x30/0x80
[ 1.217242] el1h_64_irq_handler+0x1c/0x2c
[ 1.217769] el1h_64_irq+0x78/0x7c
[ 1.218206] cpuidle_enter_state+0xc8/0x600
[ 1.218744] cpuidle_enter+0x44/0x5c
[ 1.219205] do_idle+0x224/0x2d0
[ 1.219624] cpu_startup_entry+0x30/0x80
[ 1.220129] rest_init+0x108/0x134
[ 1.220568] arch_call_rest_init+0x1c/0x28
[ 1.221094] start_kernel+0x6c0/0x700
[ 1.221564] __primary_switched+0xc0/0xc8
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| 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.