Issue:
Will have follow error when reload driver:
[ 3986.567739] sysfs: cannot create duplicate filename
'/devices/pci0000:00/0000:00:07.0/drm_dp_aux_dev'
[ 3986.567743] CPU: 6 PID: 1767 Comm: modprobe Tainted: G OE
5.0.0-rc1-custom #1
[ 3986.567745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 3986.567746] Call Trace:
......
[ 3986.567808] drm_dp_aux_register_devnode+0xdc/0x140 [drm_kms_helper]
......
[ 3986.569081] kobject_add_internal failed for drm_dp_aux_dev with -EEXIST,
don't try to register things with the same name in the same directory.
Reproduce sequences:
1.modprobe amdgpu
2.modprobe -r amdgpu
3.modprobe amdgpu
Root cause:
When unload driver, it doesn't unregister aux.
v2: Don't use has_aux
Signed-off-by: Emily Deng <emily.d...@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 8fe1685..941313b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3760,6 +3760,13 @@ int amdgpu_dm_connector_atomic_get_property(struct
drm_connector *connector,
return ret;
}
+static void amdgpu_dm_connector_unregister(struct drm_connector *connector)
+{
+ struct amdgpu_dm_connector *amdgpu_dm_connector =
to_amdgpu_dm_connector(connector);
+
+ drm_dp_aux_unregister(&amdgpu_dm_connector->dm_dp_aux.aux);
+}
+
static void amdgpu_dm_connector_destroy(struct drm_connector *connector)
{
struct amdgpu_dm_connector *aconnector =
to_amdgpu_dm_connector(connector);
@@ -3788,6 +3795,11 @@ static void amdgpu_dm_connector_destroy(struct
drm_connector *connector)
drm_dp_cec_unregister_connector(&aconnector->dm_dp_aux.aux);
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
+ if (aconnector->i2c) {
+ i2c_del_adapter(&aconnector->i2c->base);
+ kfree(aconnector->i2c);
+ }
+
kfree(connector);
}
@@ -3846,7 +3858,8 @@ static const struct drm_connector_funcs
amdgpu_dm_connector_funcs = {
.atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.atomic_set_property = amdgpu_dm_connector_atomic_set_property,
- .atomic_get_property = amdgpu_dm_connector_atomic_get_property
+ .atomic_get_property = amdgpu_dm_connector_atomic_get_property,
+ .early_unregister = amdgpu_dm_connector_unregister
};
static int get_modes(struct drm_connector *connector)
--
2.7.4
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