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drm/amdgpu: Use kmemdup rather than duplicating its implementation

Browse source 
kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.

Reviewed-by: Christian König <Christian.Koenig@amd.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Fuqian Huang 2019-07-04 00:27:18 +08:00 committed by Alex Deucher
parent a5b1615529
commit d12c202289
4 changed files with 7 additions and 13 deletions
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5
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
View file

@ -3925,11 +3925,10 @@ static int gfx_v8_0_init_save_restore_list(struct amdgpu_device *adev)
int list_size;
unsigned int *register_list_format =
kmalloc(adev->gfx.rlc.reg_list_format_size_bytes, GFP_KERNEL);
kmemdup(adev->gfx.rlc.register_list_format,
adev->gfx.rlc.reg_list_format_size_bytes, GFP_KERNEL);
if (!register_list_format)
return -ENOMEM;
memcpy(register_list_format, adev->gfx.rlc.register_list_format,
adev->gfx.rlc.reg_list_format_size_bytes);
gfx_v8_0_parse_ind_reg_list(register_list_format,
RLC_FormatDirectRegListLength,

5
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
View file

@ -2074,11 +2074,10 @@ static int gfx_v9_1_init_rlc_save_restore_list(struct amdgpu_device *adev)
u32 tmp = 0;
u32 *register_list_format =
kmalloc(adev->gfx.rlc.reg_list_format_size_bytes, GFP_KERNEL);
kmemdup(adev->gfx.rlc.register_list_format,
adev->gfx.rlc.reg_list_format_size_bytes, GFP_KERNEL);
if (!register_list_format)
return -ENOMEM;
memcpy(register_list_format, adev->gfx.rlc.register_list_format,
adev->gfx.rlc.reg_list_format_size_bytes);
/* setup unique_indirect_regs array and indirect_start_offsets array */
unique_indirect_reg_count = ARRAY_SIZE(unique_indirect_regs);

6
drivers/gpu/drm/amd/display/dc/core/dc.c
View file

@ -1190,14 +1190,12 @@ struct dc_state *dc_create_state(struct dc *dc)
struct dc_state *dc_copy_state(struct dc_state *src_ctx)
{
int i, j;
struct dc_state *new_ctx = kzalloc(sizeof(struct dc_state),
GFP_KERNEL);
struct dc_state *new_ctx = kmemdup(src_ctx,
sizeof(struct dc_state), GFP_KERNEL);
if (!new_ctx)
return NULL;
memcpy(new_ctx, src_ctx, sizeof(struct dc_state));
for (i = 0; i < MAX_PIPES; i++) {
struct pipe_ctx *cur_pipe = &new_ctx->res_ctx.pipe_ctx[i];

4
drivers/gpu/drm/amd/display/dc/core/dc_stream.c
View file

@ -181,12 +181,10 @@ struct dc_stream_state *dc_copy_stream(const struct dc_stream_state *stream)
{
struct dc_stream_state *new_stream;
new_stream = kzalloc(sizeof(struct dc_stream_state), GFP_KERNEL);
new_stream = kmemdup(stream, sizeof(struct dc_stream_state), GFP_KERNEL);
if (!new_stream)
return NULL;
memcpy(new_stream, stream, sizeof(struct dc_stream_state));
if (new_stream->sink)
dc_sink_retain(new_stream->sink);