From: Karol Kozimor <sziwan@hell.org.pl>
Date: Sat, 30 Jul 2005 08:18:00 +0000 (-0400)
Subject: [ACPI] acpi_remove_notify_handler() on video driver unload
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=031ec77bf67e4bda994ef8ceba267be3295ffdb7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[ACPI] acpi_remove_notify_handler() on video driver unload

The video driver doesn't properly remove all the notify handlers
on module unload.  This has a side effect of subdevices failing
to register on module reload, but sudden death looms if the
handlers trigger after the module is unloaded.

Signed-off-by: Karol Kozimor <sziwan@hell.org.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 2cf264fd52e0..7b10a7b070c9 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1665,6 +1665,7 @@ static int
 acpi_video_bus_put_one_device(
 	struct acpi_video_device	*device)
 {
+	acpi_status status;
 	struct acpi_video_bus *video;
 
 	ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
@@ -1679,6 +1680,12 @@ acpi_video_bus_put_one_device(
 	up(&video->sem);
 	acpi_video_device_remove_fs(device->dev);
 
+	status = acpi_remove_notify_handler(device->handle,
+		ACPI_DEVICE_NOTIFY, acpi_video_device_notify);
+	if (ACPI_FAILURE(status))
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+			"Error removing notify handler\n"));
+
 	return_VALUE(0);
 }