diff options
| author | mengwang <mengbing.wang@amd.com> | 2020-11-10 12:06:46 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-11-13 00:12:59 -0500 |
| commit | 4d53f5219ba5b8d15a41b36773cc57d2cf767e77 (patch) | |
| tree | 30e37d2cd6008e88f0fb6bf3fbc554666418346c /drivers/gpu | |
| parent | 349a32898838a4b9b78d6258fe8b20c60029438d (diff) | |
drm/amd/pm: correct table_clk_vlt memory size due to replacing one-element array with flexible-array in struct phm_clock_voltage_dependency_table
Add 1 to the size passed to kzalloc after replacing one-element array.
There is a regular need in the kernel to provide a way to declare having
a dynamically sized set of trailing elements in a structure. Kernel code
should always use “flexible array members”[1] for these cases. The older
style of one-element or zero-length arrays should no longer be used[2].
Refactor the code according to the use of a flexible-array member in
struct phm_ppt_v1_mm_clock_voltage_dependency_table, instead of a
one-element array, and use the struct_size() helper to calculate the
size for the allocation.
[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arrays
Signed-off-by: Mengbing Wang <mengbing.wang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c index cf60f3992303..133a08444943 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c @@ -130,9 +130,10 @@ static int smu10_construct_max_power_limits_table(struct pp_hwmgr *hwmgr, static int smu10_init_dynamic_state_adjustment_rule_settings( struct pp_hwmgr *hwmgr) { + int count = 8; struct phm_clock_voltage_dependency_table *table_clk_vlt; - table_clk_vlt = kzalloc(struct_size(table_clk_vlt, entries, 7), + table_clk_vlt = kzalloc(struct_size(table_clk_vlt, entries, count), GFP_KERNEL); if (NULL == table_clk_vlt) { @@ -140,7 +141,7 @@ static int smu10_init_dynamic_state_adjustment_rule_settings( return -ENOMEM; } - table_clk_vlt->count = 8; + table_clk_vlt->count = count; table_clk_vlt->entries[0].clk = PP_DAL_POWERLEVEL_0; table_clk_vlt->entries[0].v = 0; table_clk_vlt->entries[1].clk = PP_DAL_POWERLEVEL_1; |