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authorIgor Murzov <intergalactic.anonymous@gmail.com>2012-03-30 21:32:09 +0400
committerLen Brown <len.brown@intel.com>2012-03-30 15:47:52 -0400
commitb60e7f6166857c76871977794fa266b02da1f394 (patch)
treee101d6548b7a841ffca1e20fd10cf54f4d80bace /drivers/acpi/video.c
parentea9f8856bd6d4ed45885b06a338f7362cd6c60e5 (diff)
ACPI video: Don't start video device until its associated input device has been allocated
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>
Diffstat (limited to 'drivers/acpi/video.c')
-rw-r--r--drivers/acpi/video.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 462486b9f9b2..9577b6fa2650 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -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);