Merge tag 'dma-mapping-5.15-1' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fixes from Christoph Hellwig:

 - page align size in sparc32 arch_dma_alloc (Andreas Larsson)

 - tone down a new dma-debug message (Hamza Mahfooz)

 - fix the kerneldoc for dma_map_sg_attrs (me)

* tag 'dma-mapping-5.15-1' of git://git.infradead.org/users/hch/dma-mapping:
  sparc32: page align size in arch_dma_alloc
  dma-debug: prevent an error message from causing runtime problems
  dma-mapping: fix the kerneldoc for dma_map_sg_attrs

Author: torvalds

arch/sparc/kernel/ioport.c

@@ -356,7 +356,9 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
 		dma_addr_t dma_addr, unsigned long attrs)
 {
-	if (!sparc_dma_free_resource(cpu_addr, PAGE_ALIGN(size)))
+	size = PAGE_ALIGN(size);
+
+	if (!sparc_dma_free_resource(cpu_addr, size))
 		return;
 
 	dma_make_coherent(dma_addr, size);

kernel/dma/debug.c

@@ -567,7 +567,8 @@ static void add_dma_entry(struct dma_debug_entry *entry)
 		pr_err("cacheline tracking ENOMEM, dma-debug disabled\n");
 		global_disable = true;
 	} else if (rc == -EEXIST) {
-		pr_err("cacheline tracking EEXIST, overlapping mappings aren't supported\n");
+		err_printk(entry->dev, entry,
+			"cacheline tracking EEXIST, overlapping mappings aren't supported\n");
 	}
 }
 

kernel/dma/mapping.c

@@ -206,7 +206,8 @@ static int __dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
 /**
  * dma_map_sg_attrs - Map the given buffer for DMA
  * @dev:	The device for which to perform the DMA operation
- * @sg:	The sg_table object describing the buffer
+ * @sg:		The sg_table object describing the buffer
+ * @nents:	Number of entries to map
  * @dir:	DMA direction
  * @attrs:	Optional DMA attributes for the map operation
  *