From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: rjw@rjwysocki.net, AceLan Kao <acelan.kao@canonical.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Len Brown <lenb@kernel.org>,
"open list:ACPI" <linux-acpi@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ACPI / device_sysfs: Prefer "compatible" modalias
Date: Fri, 22 Jan 2021 15:00:48 +0200 [thread overview]
Message-ID: <20210122130048.GN1988617@lahna.fi.intel.com> (raw)
In-Reply-To: <20210122125302.991591-1-kai.heng.feng@canonical.com>
On Fri, Jan 22, 2021 at 08:53:02PM +0800, Kai-Heng Feng wrote:
> Commit 8765c5ba1949 ("ACPI / scan: Rework modalias creation when
> "compatible" is present") may create two "MODALIAS=" in uevent file if
> conditions are met.
>
> This breaks systemd-udevd, which assumes each "key" in uevent file is
> unique. The internal implementation of systemd-udevd overwrites the
> first MODALIAS with the second one, so its kmod rule doesn't load driver
> for the first MODALIAS.
>
> So if both ACPI modalias and OF modalias are present, use the latter
> one to ensure there's only one MODALIAS.
>
> Reference: https://github.com/systemd/systemd/pull/18163
> Cc: AceLan Kao <acelan.kao@canonical.com>
> Cc: "Rafael J. Wysocki" <rafael@kernel.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Fixes: 8765c5ba1949 ("ACPI / scan: Rework modalias creation when "compatible" is present")
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
next prev parent reply other threads:[~2021-01-22 13:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 12:53 [PATCH] ACPI / device_sysfs: Prefer "compatible" modalias Kai-Heng Feng
2021-01-22 13:00 ` Mika Westerberg [this message]
2021-01-22 13:06 ` Greg Kroah-Hartman
2021-01-25 16:08 ` Rafael J. Wysocki
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