From: Thomas Gleixner <tglx@kernel.org>
To: Yicong Yang <yang.yicong@picoheart.com>,
Anup Patel <apatel@ventanamicro.com>
Cc: yang.yicong@picoheart.com, anup@brainfault.org, pjw@kernel.org,
palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
geshijian@picoheart.com, weidong.wd@picoheart.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Danilo Krummrich <dakr@kernel.org>
Subject: Re: [PATCH] irqchip/riscv-aplic: Register the driver prior to device creation
Date: Fri, 16 Jan 2026 12:41:04 +0100 [thread overview]
Message-ID: <87h5sl3hv3.ffs@tglx> (raw)
In-Reply-To: <b2eb7f70-8ee9-43f6-b086-f0c17b1f9e39@picoheart.com>
On Fri, Jan 16 2026 at 14:16, Yicong Yang wrote:
> On 1/15/26 9:28 PM, Thomas Gleixner wrote:
>> On Thu, Jan 15 2026 at 16:31, Yicong Yang wrote:
>>> so based on above, if we use async_wq (with async_schedule* APIs) in
>>> acpi_scan_clear_dep_queue() for creating these devices, the issue
>>> could be solved since we're sure to have these devices before entering
>>> userspace, since the barrier of async_synchronize_full(). This should be
>>> a solution with a conceptual support and I did a quick test on our
>>> platform it solves the issue.
>>
>> Sounds about right to me. The drivers core and ACPI folks might have
>> opinions though :)
>>
> sure I'll wait a bit to see if there's further comment before sending out
> next version.
Btw, there is a reason that this is on the default work queue. See
commit dc612486c919 ("ACPI: scan: Fix device object rescan in
acpi_scan_clear_dep()")
for details. So this needs some more thought.
Thanks,
tglx
prev parent reply other threads:[~2026-01-16 11:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-14 6:37 [PATCH] irqchip/riscv-aplic: Register the driver prior to device creation Yicong Yang
2026-01-14 8:57 ` Anup Patel
2026-01-14 11:48 ` Yicong Yang
2026-01-14 19:50 ` Thomas Gleixner
2026-01-15 8:31 ` Yicong Yang
2026-01-15 13:28 ` Thomas Gleixner
2026-01-16 6:16 ` Yicong Yang
2026-01-16 11:41 ` Thomas Gleixner [this message]
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