diff options
| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2020-10-07 11:10:44 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-10-09 14:43:30 -0400 |
| commit | bae82e84182349d30d5f0c8dfa44cab00baf3425 (patch) | |
| tree | f03886e10783f398c4955ad4ed3ce773f0533c09 /drivers/gpu/drm | |
| parent | b44fd9ccfaebbd01bda6b9d5d4dff2469a992dd1 (diff) | |
drm/amd/pm: Replace one-element array with flexible-array in struct phm_ppt_v1_pcie_table
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_pcie_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
Build-tested-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/5f7db0bc.7Xivn4K83f7XW0ug%25lkp@intel.com/
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
3 files changed, 13 insertions, 21 deletions
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hwmgr_ppt.h b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hwmgr_ppt.h index e11298cdeb30..729615aff126 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hwmgr_ppt.h +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hwmgr_ppt.h @@ -103,7 +103,7 @@ typedef struct phm_ppt_v1_pcie_record phm_ppt_v1_pcie_record; struct phm_ppt_v1_pcie_table { uint32_t count; /* Number of entries. */ - phm_ppt_v1_pcie_record entries[1]; /* Dynamically allocate count entries. */ + phm_ppt_v1_pcie_record entries[]; /* Dynamically allocate count entries. */ }; typedef struct phm_ppt_v1_pcie_table phm_ppt_v1_pcie_table; diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/process_pptables_v1_0.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/process_pptables_v1_0.c index 426655b9c678..4fa58614e26a 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/process_pptables_v1_0.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/process_pptables_v1_0.c @@ -478,7 +478,7 @@ static int get_pcie_table( PPTable_Generic_SubTable_Header const *ptable ) { - uint32_t table_size, i, pcie_count; + uint32_t i, pcie_count; phm_ppt_v1_pcie_table *pcie_table; struct phm_ppt_v1_information *pp_table_information = (struct phm_ppt_v1_information *)(hwmgr->pptable); @@ -491,12 +491,10 @@ static int get_pcie_table( PP_ASSERT_WITH_CODE((atom_pcie_table->ucNumEntries != 0), "Invalid PowerPlay Table!", return -1); - table_size = sizeof(uint32_t) + - sizeof(phm_ppt_v1_pcie_record) * atom_pcie_table->ucNumEntries; - - pcie_table = kzalloc(table_size, GFP_KERNEL); - - if (pcie_table == NULL) + pcie_table = kzalloc(struct_size(pcie_table, entries, + atom_pcie_table->ucNumEntries), + GFP_KERNEL); + if (!pcie_table) return -ENOMEM; /* @@ -530,12 +528,10 @@ static int get_pcie_table( PP_ASSERT_WITH_CODE((atom_pcie_table->ucNumEntries != 0), "Invalid PowerPlay Table!", return -1); - table_size = sizeof(uint32_t) + - sizeof(phm_ppt_v1_pcie_record) * atom_pcie_table->ucNumEntries; - - pcie_table = kzalloc(table_size, GFP_KERNEL); - - if (pcie_table == NULL) + pcie_table = kzalloc(struct_size(pcie_table, entries, + atom_pcie_table->ucNumEntries), + GFP_KERNEL); + if (!pcie_table) return -ENOMEM; /* diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_processpptables.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_processpptables.c index 3d7f915381c8..535404de78a2 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_processpptables.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_processpptables.c @@ -784,7 +784,7 @@ static int get_pcie_table(struct pp_hwmgr *hwmgr, struct phm_ppt_v1_pcie_table **vega10_pcie_table, const Vega10_PPTable_Generic_SubTable_Header *table) { - uint32_t table_size, i, pcie_count; + uint32_t i, pcie_count; struct phm_ppt_v1_pcie_table *pcie_table; struct phm_ppt_v2_information *table_info = (struct phm_ppt_v2_information *)(hwmgr->pptable); @@ -795,12 +795,8 @@ static int get_pcie_table(struct pp_hwmgr *hwmgr, "Invalid PowerPlay Table!", return 0); - table_size = sizeof(uint32_t) + - sizeof(struct phm_ppt_v1_pcie_record) * - atom_pcie_table->ucNumEntries; - - pcie_table = kzalloc(table_size, GFP_KERNEL); - + pcie_table = kzalloc(struct_size(pcie_table, entries, atom_pcie_table->ucNumEntries), + GFP_KERNEL); if (!pcie_table) return -ENOMEM; |