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The kernel IRQ system needs the irq affinity notifier to be clear
before attempting to free the irq, see WARN_ON log below.
On a normal driver unload we don't have this issue since we do the
complete cleanup of the irq resources.
To fix this, put the important resources cleanup in a helper function
and use it in both normal driver unload and shutdown flows.
[ 4497.498434] ------------[ cut here ]------------
[ 4497.498726] WARNING: CPU: 0 PID: 9 at kernel/irq/manage.c:2034 free_irq+0x295/0x340
[ 4497.499193] Modules linked in:
[ 4497.499386] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G W 6.4.0-rc4+ #10
[ 4497.499876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014
[ 4497.500518] Workqueue: events do_poweroff
[ 4497.500849] RIP: 0010:free_irq+0x295/0x340
[ 4497.501132] Code: 85 c0 0f 84 1d ff ff ff 48 89 ef ff d0 0f 1f 00 e9 10 ff ff ff 0f 0b e9 72 ff ff ff 49 8d 7f 28 ff d0 0f 1f 00 e9 df fd ff ff <0f> 0b 48 c7 80 c0 008
[ 4497.502269] RSP: 0018:ffffc90000053da0 EFLAGS: 00010282
[ 4497.502589] RAX: ffff888100949600 RBX: ffff88810330b948 RCX: 0000000000000000
[ 4497.503035] RDX: ffff888100949600 RSI: ffff888100400490 RDI: 0000000000000023
[ 4497.503472] RBP: ffff88810330c7e0 R08: ffff8881004005d0 R09: ffffffff8273a260
[ 4497.503923] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881009ae000
[ 4497.504359] R13: ffff8881009ae148 R14: 0000000000000000 R15: ffff888100949600
[ 4497.504804] FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[ 4497.505302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4497.505671] CR2: 00007fce98806298 CR3: 000000000262e005 CR4: 0000000000370ef0
[ 4497.506104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4497.506540] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4497.507002] Call Trace:
[ 4497.507158] <TASK>
[ 4497.507299] ? free_irq+0x295/0x340
[ 4497.507522] ? __warn+0x7c/0x130
[ 4497.507740] ? free_irq+0x295/0x340
[ 4497.507963] ? report_bug+0x171/0x1a0
[ 4497.508197] ? handle_bug+0x3c/0x70
[ 4497.508417] ? exc_invalid_op+0x17/0x70
[ 4497.508662] ? asm_exc_invalid_op+0x1a/0x20
[ 4497.508926] ? free_irq+0x295/0x340
[ 4497.509146] mlx5_irq_pool_free_irqs+0x48/0x90
[ 4497.509421] mlx5_irq_table_free_irqs+0x38/0x50
[ 4497.509714] mlx5_core_eq_free_irqs+0x27/0x40
[ 4497.509984] shutdown+0x7b/0x100
[ 4497.510184] pci_device_shutdown+0x30/0x60
[ 4497.510440] device_shutdown+0x14d/0x240
[ 4497.510698] kernel_power_off+0x30/0x70
[ 4497.510938] process_one_work+0x1e6/0x3e0
[ 4497.511183] worker_thread+0x49/0x3b0
[ 4497.511407] ? __pfx_worker_thread+0x10/0x10
[ 4497.511679] kthread+0xe0/0x110
[ 4497.511879] ? __pfx_kthread+0x10/0x10
[ 4497.512114] ret_from_fork+0x29/0x50
[ 4497.512342] </TASK>
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.