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drm/amd/pm: check negtive return for table entries

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[ Upstream commit f76059fe14 ]

Function hwmgr->hwmgr_func->get_num_of_pp_table_entries(hwmgr) returns a negative number

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Suggested-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jesse Zhang 2024-05-13 16:01:23 +08:00 committed by Greg Kroah-Hartman
parent 7d265772e4
commit 7e8d106ca9
1 changed files with 8 additions and 5 deletions
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13
drivers/gpu/drm/amd/pm/powerplay/hwmgr/pp_psm.c
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@ -30,9 +30,8 @@ int psm_init_power_state_table(struct pp_hwmgr *hwmgr)
{ {
int result; int result;
unsigned int i; unsigned int i;
unsigned int table_entries;
struct pp_power_state *state; struct pp_power_state *state;
int size; int size, table_entries;
if (hwmgr->hwmgr_func->get_num_of_pp_table_entries == NULL) if (hwmgr->hwmgr_func->get_num_of_pp_table_entries == NULL)
return 0; return 0;
@ -40,15 +39,19 @@ int psm_init_power_state_table(struct pp_hwmgr *hwmgr)
if (hwmgr->hwmgr_func->get_power_state_size == NULL) if (hwmgr->hwmgr_func->get_power_state_size == NULL)
return 0; return 0;
hwmgr->num_ps = table_entries = hwmgr->hwmgr_func->get_num_of_pp_table_entries(hwmgr); table_entries = hwmgr->hwmgr_func->get_num_of_pp_table_entries(hwmgr);
hwmgr->ps_size = size = hwmgr->hwmgr_func->get_power_state_size(hwmgr) + size = hwmgr->hwmgr_func->get_power_state_size(hwmgr) +
sizeof(struct pp_power_state); sizeof(struct pp_power_state);
if (table_entries == 0 || size == 0) { if (table_entries <= 0 || size == 0) {
pr_warn("Please check whether power state management is supported on this asic\n"); pr_warn("Please check whether power state management is supported on this asic\n");
hwmgr->num_ps = 0;
hwmgr->ps_size = 0;
return 0; return 0;
} }
hwmgr->num_ps = table_entries;
hwmgr->ps_size = size;
hwmgr->ps = kcalloc(table_entries, size, GFP_KERNEL); hwmgr->ps = kcalloc(table_entries, size, GFP_KERNEL);
if (hwmgr->ps == NULL) if (hwmgr->ps == NULL)