iommu: Fix typo in iommu

Correct spelling typo in debug messages and comments
in drivers/iommu.
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/iommu/amd_iommu_v2.c

@@ -924,7 +924,7 @@ static int __init amd_iommu_v2_init(void)
 	pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>\n");
 
 	if (!amd_iommu_v2_supported()) {
-		pr_info("AMD IOMMUv2 functionality not available on this sytem\n");
+		pr_info("AMD IOMMUv2 functionality not available on this system\n");
 		/*
 		 * Load anyway to provide the symbols to other modules
 		 * which may use AMD IOMMUv2 optionally.

drivers/iommu/exynos-iommu.c

@@ -317,7 +317,7 @@ static int default_fault_handler(enum exynos_sysmmu_inttype itype,
 	if ((itype >= SYSMMU_FAULTS_NUM) || (itype < SYSMMU_PAGEFAULT))
 		itype = SYSMMU_FAULT_UNKNOWN;
 
-	pr_err("%s occured at 0x%lx(Page table base: 0x%lx)\n",
+	pr_err("%s occurred at 0x%lx(Page table base: 0x%lx)\n",
 			sysmmu_fault_name[itype], fault_addr, pgtable_base);
 
 	ent = section_entry(__va(pgtable_base), fault_addr);

drivers/iommu/iova.c

@@ -198,10 +198,10 @@ iova_insert_rbtree(struct rb_root *root, struct iova *iova)
 
 /**
  * alloc_iova - allocates an iova
- * @iovad - iova domain in question
- * @size - size of page frames to allocate
- * @limit_pfn - max limit address
- * @size_aligned - set if size_aligned address range is required
+ * @iovad: - iova domain in question
+ * @size: - size of page frames to allocate
+ * @limit_pfn: - max limit address
+ * @size_aligned: - set if size_aligned address range is required
  * This function allocates an iova in the range limit_pfn to IOVA_START_PFN
  * looking from limit_pfn instead from IOVA_START_PFN. If the size_aligned
  * flag is set then the allocated address iova->pfn_lo will be naturally
@@ -238,8 +238,8 @@ alloc_iova(struct iova_domain *iovad, unsigned long size,
 
 /**
  * find_iova - find's an iova for a given pfn
- * @iovad - iova domain in question.
- * pfn - page frame number
+ * @iovad: - iova domain in question.
+ * @pfn: - page frame number
  * This function finds and returns an iova belonging to the
  * given doamin which matches the given pfn.
  */
@@ -260,7 +260,7 @@ struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn)
 			/* We are not holding the lock while this iova
 			 * is referenced by the caller as the same thread
 			 * which called this function also calls __free_iova()
-			 * and it is by desing that only one thread can possibly
+			 * and it is by design that only one thread can possibly
 			 * reference a particular iova and hence no conflict.
 			 */
 			return iova;