From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux ACPI <linux-acpi@vger.kernel.org>,
Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Russell King (Oracle)" <linux@armlinux.org.uk>
Subject: [PATCH v1 1/4] ACPI: scan: Fix device check notification handling
Date: Wed, 21 Feb 2024 21:01:02 +0100 [thread overview]
Message-ID: <4886572.GXAFRqVoOG@kreacher> (raw)
In-Reply-To: <4562925.LvFx2qVVIh@kreacher>
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It is generally invalid to fail a Device Check notification if the scan
handler has not been attached to the given device after a bus rescan,
because there may be valid reasons for the scan handler to refuse
attaching to the device (for example, the device is not ready).
For this reason, modify acpi_scan_device_check() to return 0 in that
case without printing a warning.
While at it, reduce the log level of the "already enumerated" message
in the same function, because it is only interesting when debugging
notification handling
Fixes: 443fc8202272 ("ACPI / hotplug: Rework generic code to handle suprise removals")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/scan.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
Index: linux-pm/drivers/acpi/scan.c
===================================================================
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -314,18 +314,14 @@ static int acpi_scan_device_check(struct
* again).
*/
if (adev->handler) {
- dev_warn(&adev->dev, "Already enumerated\n");
- return -EALREADY;
+ dev_dbg(&adev->dev, "Already enumerated\n");
+ return 0;
}
error = acpi_bus_scan(adev->handle);
if (error) {
dev_warn(&adev->dev, "Namespace scan failure\n");
return error;
}
- if (!adev->handler) {
- dev_warn(&adev->dev, "Enumeration failure\n");
- error = -ENODEV;
- }
} else {
error = acpi_scan_device_not_enumerated(adev);
}
next prev parent reply other threads:[~2024-02-21 20:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-21 19:59 [PATCH v1 0/4] ACPI: scan: Check enabled _STA bit on Bus/Device Checks Rafael J. Wysocki
2024-02-21 20:01 ` Rafael J. Wysocki [this message]
2024-02-22 18:50 ` [PATCH v1 1/4] ACPI: scan: Fix device check notification handling Jonathan Cameron
2024-02-21 20:01 ` [PATCH v1 2/4] ACPI: scan: Relocate acpi_bus_trim_one() Rafael J. Wysocki
2024-02-22 17:09 ` Jonathan Cameron
2024-02-21 20:02 ` [PATCH v1 3/4] ACPI: scan: Rework Device Check and Bus Check notification handling Rafael J. Wysocki
2024-02-22 18:28 ` Jonathan Cameron
2024-02-26 15:37 ` Rafael J. Wysocki
2024-02-26 15:54 ` Rafael J. Wysocki
2024-02-21 20:03 ` [PATCH v1 4/4] ACPI: scan: Make acpi_processor_add() check the device enabled bit Rafael J. Wysocki
2024-02-22 18:47 ` Jonathan Cameron
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