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amdgpu: fix NULL pointer dereference at tonga_check_states_equal 

The event_data passed from pem_fini was not cleared upon initialization.
This caused NULL checks to pass and cast_const_phw_tonga_power_state to
attempt to dereference an invalid pointer. Clear the event_data in
pem_init and pem_fini before calling pem_handle_event.

Reviewed-by:  Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Bradley Pankow <btpankow@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bradley Pankow 2016-02-22 20:11:47 -05:00 committed by Alex Deucher
parent 39d4275058
commit 827108d080
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/powerplay/eventmgr/eventmgr.c
View File

@ -31,7 +31,7 @@
static int pem_init(struct pp_eventmgr *eventmgr) static int pem_init(struct pp_eventmgr *eventmgr)
{ {
int result = 0; int result = 0;
struct pem_event_data event_data; struct pem_event_data event_data = { {0} };
/* Initialize PowerPlay feature info */ /* Initialize PowerPlay feature info */
pem_init_feature_info(eventmgr); pem_init_feature_info(eventmgr);
@ -52,7 +52,7 @@ static int pem_init(struct pp_eventmgr *eventmgr)
static void pem_fini(struct pp_eventmgr *eventmgr) static void pem_fini(struct pp_eventmgr *eventmgr)
{ {
struct pem_event_data event_data; struct pem_event_data event_data = { {0} };
pem_uninit_featureInfo(eventmgr); pem_uninit_featureInfo(eventmgr);
pem_unregister_interrupts(eventmgr); pem_unregister_interrupts(eventmgr);