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dma-mapping fixes for Linux 5.15 

- 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)
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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
This commit is contained in:
Linus Torvalds 2021-09-17 11:54:48 -07:00
parent 7639afad8b 59583f7476
commit b9b11b133b
3 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/sparc/kernel/ioport.c
View File

@ -356,7 +356,9 @@ err_nomem:
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);

3
kernel/dma/debug.c
View File

@ -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");
}
}

1
kernel/dma/mapping.c
View File

@ -207,6 +207,7 @@ 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
* @nents: Number of entries to map
* @dir: DMA direction
* @attrs: Optional DMA attributes for the map operation
*