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ACPI video: Don't start video device until its associated input device has been allocated

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Quoth Dmitry Torokhov:
In addition to bus notifier we do install device notifier explicitly
so it might fire up early. The easiest fox would be to move
acpi_video_bus_start_devices() after input_allocate_device() but
before input_register_device() - unregistered input devices can handle
input_event() calls just fine.

May fix crashes reported in:
https://bugzilla.kernel.org/show_bug.cgi?id=40672

Signed-off-by: Igor Murzov <e-mail@date.by>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Igor Murzov 2012-03-30 21:32:09 +04:00 committed by Len Brown
parent ea9f8856bd
commit b60e7f6166
1 changed files with 8 additions and 7 deletions
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15
drivers/acpi/video.c
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@ -1658,16 +1658,17 @@ static int acpi_video_bus_add(struct acpi_device *device)
error = acpi_video_bus_get_devices(video, device);
if (error)
goto err_free_video;
error = acpi_video_bus_start_devices(video);
if (error)
goto err_put_video;
video->input = input = input_allocate_device();
if (!input) {
error = -ENOMEM;
goto err_stop_video;
goto err_put_video;
}
error = acpi_video_bus_start_devices(video);
if (error)
goto err_free_input_dev;
snprintf(video->phys, sizeof(video->phys),
"%s/video/input0", acpi_device_hid(video->device));
@ -1688,7 +1689,7 @@ static int acpi_video_bus_add(struct acpi_device *device)
error = input_register_device(input);
if (error)
goto err_free_input_dev;
goto err_stop_video;
printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
@ -1706,10 +1707,10 @@ static int acpi_video_bus_add(struct acpi_device *device)
err_unregister_input_dev:
input_unregister_device(input);
err_free_input_dev:
input_free_device(input);
err_stop_video:
acpi_video_bus_stop_devices(video);
err_free_input_dev:
input_free_device(input);
err_put_video:
acpi_video_bus_put_devices(video);
kfree(video->attached_array);