Commit b7358132 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amd/display: use vmalloc for struct dc_state 

This is a big structure so use vmalloc as malloc can
fail when there is memory pressure.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3454


Reviewed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 15eb8573

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

+4 −2
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
 *

 */



#include <linux/vmalloc.h>

#include <drm/display/drm_dp_helper.h>

#include <drm/display/drm_dp_mst_helper.h>

#include <drm/drm_atomic.h>
@@ -1491,9 +1492,10 @@ int pre_validate_dsc(struct drm_atomic_state *state, 
	 * from dm_state->context.

	 */



	local_dc_state = kmemdup(dm_state->context, sizeof(struct dc_state), GFP_KERNEL);

	local_dc_state = vmalloc(sizeof(struct dc_state));

	if (!local_dc_state)

		return -ENOMEM;

	memcpy(local_dc_state, dm_state->context, sizeof(struct dc_state));



	for (i = 0; i < local_dc_state->stream_count; i++) {

		struct dc_stream_state *stream = dm_state->context->streams[i];
@@ -1563,7 +1565,7 @@ int pre_validate_dsc(struct drm_atomic_state *state, 
			dc_stream_release(local_dc_state->streams[i]);

	}



	kfree(local_dc_state);

	vfree(local_dc_state);



	return ret;

}