x86, AMD IOMMU: remove unnecessary free checks from init code

This patch removes unnecessary checks before memory is released.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/amd_iommu_init.c

@@ -417,9 +417,7 @@ static u8 * __init alloc_command_buffer(struct amd_iommu *iommu)
 
 static void __init free_command_buffer(struct amd_iommu *iommu)
 {
-	if (iommu->cmd_buf)
-		free_pages((unsigned long)iommu->cmd_buf,
-				get_order(CMD_BUFFER_SIZE));
+	free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
 }
 
 /* sets a specific bit in the device table entry. */
@@ -987,22 +985,17 @@ out:
 	return ret;
 
 free:
-	if (amd_iommu_pd_alloc_bitmap)
 	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap, 1);
 
-	if (amd_iommu_pd_table)
 	free_pages((unsigned long)amd_iommu_pd_table,
 		   get_order(rlookup_table_size));
 
-	if (amd_iommu_rlookup_table)
 	free_pages((unsigned long)amd_iommu_rlookup_table,
 		   get_order(rlookup_table_size));
 
-	if (amd_iommu_alias_table)
 	free_pages((unsigned long)amd_iommu_alias_table,
 		   get_order(alias_table_size));
 
-	if (amd_iommu_dev_table)
 	free_pages((unsigned long)amd_iommu_dev_table,
 		   get_order(dev_table_size));