x86/amd-iommu: Move compl-wait command building to own function
This patch introduces a seperate function for building
completion-wait commands.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 57ca777..eebd504 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -383,6 +383,13 @@
*
****************************************************************************/
+static void build_completion_wait(struct iommu_cmd *cmd)
+{
+ memset(cmd, 0, sizeof(*cmd));
+ cmd->data[0] = CMD_COMPL_WAIT_INT_MASK;
+ CMD_SET_TYPE(cmd, CMD_COMPL_WAIT);
+}
+
/*
* Writes the command to the IOMMUs command buffer and informs the
* hardware about the new command. Must be called with iommu->lock held.
@@ -458,9 +465,7 @@
{
struct iommu_cmd cmd;
- memset(&cmd, 0, sizeof(cmd));
- cmd.data[0] = CMD_COMPL_WAIT_INT_MASK;
- CMD_SET_TYPE(&cmd, CMD_COMPL_WAIT);
+ build_completion_wait(&cmd);
return __iommu_queue_command(iommu, &cmd);
}