diff options
| author | Zhen Lei <thunder.leizhen@huawei.com> | 2021-08-17 14:34:11 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-10-04 14:20:50 +0300 |
| commit | 93f9f7958f12a1703799442011dd5f18db893c13 (patch) | |
| tree | dc114511632674c38c71685fb2b37aa78917de4a /drivers/iommu | |
| parent | 5816b3e6577eaa676ceb00a848f0fd65fe2adc29 (diff) | |
| download | linux-93f9f7958f12a1703799442011dd5f18db893c13.tar.xz | |
iommu/arm-smmu-v3: Stop pre-zeroing batch commands in arm_smmu_atc_inv_master()
Pre-zeroing the batched commands structure is inefficient, as individual
commands are zeroed later in arm_smmu_cmdq_build_cmd(). Therefore, only
the member 'num' needs to be initialized to 0.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/20210817113411.1962-1-thunder.leizhen@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index a388e318f86e..6340a88a1755 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -1764,10 +1764,11 @@ static int arm_smmu_atc_inv_master(struct arm_smmu_master *master) { int i; struct arm_smmu_cmdq_ent cmd; - struct arm_smmu_cmdq_batch cmds = {}; + struct arm_smmu_cmdq_batch cmds; arm_smmu_atc_inv_to_cmd(0, 0, 0, &cmd); + cmds.num = 0; for (i = 0; i < master->num_streams; i++) { cmd.atc.sid = master->streams[i].id; arm_smmu_cmdq_batch_add(master->smmu, &cmds, &cmd); |