drm/amd/display: Fix a potential NULL dereference

The debug printk dereferences "link->link_enc" before we have ensured
that it is non-NULL.  Fix this potential NULL derefence by moving the
printk after the check.

Fixes: 64ff0882426e56 ("drm/amd/display: Log link/connector info provided in BIOS object table")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 91d4130cd2cbf2a85ec516179b9c5123de6ecd3b..55f20d731b25f9115adf485bddbd8bd26541251c 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -1525,13 +1525,13 @@ static bool dc_link_construct(struct dc_link *link,
        link->link_enc =
                link->dc->res_pool->funcs->link_enc_create(&enc_init_data);
 
-       DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
-
        if (!link->link_enc) {
                DC_ERROR("Failed to create link encoder!\n");
                goto link_enc_create_fail;
        }
 
+       DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
+
        link->link_enc_hw_inst = link->link_enc->transmitter;
 
        for (i = 0; i < 4; i++) {