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dma-mapping updates for Linux 5.14

Browse source 
- a trivivial whitespace fix (Zhen Lei)
  - report -EEXIST errors in add_dma_entry (Hamza Mahfooz)
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Merge tag 'dma-mapping-5.14' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - a trivivial whitespace fix (Zhen Lei)

 - report -EEXIST errors in add_dma_entry (Hamza Mahfooz)

* tag 'dma-mapping-5.14' of git://git.infradead.org/users/hch/dma-mapping:
  dma-debug: report -EEXIST errors in add_dma_entry
  dma-mapping: remove a trailing space
This commit is contained in:
Linus Torvalds 2021-07-02 13:31:08 -07:00
commit e72b069609
2 changed files with 3 additions and 5 deletions
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2
kernel/dma/coherent.c
View file

@ -111,7 +111,7 @@ static int dma_assign_coherent_memory(struct device *dev,
* Declare a region of memory to be handed out by dma_alloc_coherent() when it
* is asked for coherent memory for this device. This shall only be used
* from platform code, usually based on the device tree description.
*
*
* phys_addr is the CPU physical address to which the memory is currently
* assigned (this will be ioremapped so the CPU can access the region).
*

6
kernel/dma/debug.c
View file

@ -566,11 +566,9 @@ static void add_dma_entry(struct dma_debug_entry *entry)
if (rc == -ENOMEM) {
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");
}
/* TODO: report -EEXIST errors here as overlapping mappings are
* not supported by the DMA API
*/
}
static int dma_debug_create_entries(gfp_t gfp)