From: Martin Leung <martin.leung@xxxxxxx>
[Why]:
On power down, virtual dal may try to delete link_encoders by
referencing uninitialized res_pool.
[How]:
Added guard against empty res_pool.
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Signed-off-by: Martin Leung <martin.leung@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 795766cb27dd..34a3e1eeb5c4 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -347,10 +347,16 @@ static bool create_link_encoders(struct dc *dc)
*/
static void destroy_link_encoders(struct dc *dc)
{
- unsigned int num_usb4_dpia = dc->res_pool->res_cap->num_usb4_dpia;
- unsigned int num_dig_link_enc = dc->res_pool->res_cap->num_dig_link_enc;
+ unsigned int num_usb4_dpia;
+ unsigned int num_dig_link_enc;
int i;
+ if (!dc->res_pool)
+ return;
+
+ num_usb4_dpia = dc->res_pool->res_cap->num_usb4_dpia;
+ num_dig_link_enc = dc->res_pool->res_cap->num_dig_link_enc;
+
/* A platform without USB4 DPIA endpoints has a fixed mapping between DIG
* link encoders and physical display endpoints and does not require
* additional link encoder objects.
--
2.25.1
