diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 7b4381154da..d3d9d50d93a 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -531,7 +531,9 @@ static void build_inv_all(struct iommu_cmd *cmd) * Writes the command to the IOMMUs command buffer and informs the * hardware about the new command. */ -static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd) +static int iommu_queue_command_sync(struct amd_iommu *iommu, + struct iommu_cmd *cmd, + bool sync) { u32 left, tail, head, next_tail; unsigned long flags; @@ -565,13 +567,18 @@ again: copy_cmd_to_buffer(iommu, cmd, tail); /* We need to sync now to make sure all commands are processed */ - iommu->need_sync = true; + iommu->need_sync = sync; spin_unlock_irqrestore(&iommu->lock, flags); return 0; } +static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd) +{ + return iommu_queue_command_sync(iommu, cmd, true); +} + /* * This function queues a completion wait command into the command * buffer of an IOMMU @@ -587,7 +594,7 @@ static int iommu_completion_wait(struct amd_iommu *iommu) build_completion_wait(&cmd, (u64)&sem); - ret = iommu_queue_command(iommu, &cmd); + ret = iommu_queue_command_sync(iommu, &cmd, false); if (ret) return ret; |