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dma-mapping regression fix for 5.4-rc2

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- revert an incorret hunk from a patch that caused problems
    on various arm boards (Andrey Smirnov)
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Merge tag 'dma-mapping-5.4-1' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping regression fix from Christoph Hellwig:
 "Revert an incorret hunk from a patch that caused problems on various
  arm boards (Andrey Smirnov)"

* tag 'dma-mapping-5.4-1' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: fix false positive warnings in dma_common_free_remap()
This commit is contained in:
Linus Torvalds 2019-10-06 11:10:15 -07:00
commit 7cdb85df60
1 changed files with 2 additions and 2 deletions
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4
kernel/dma/remap.c
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@ -87,9 +87,9 @@ void *dma_common_contiguous_remap(struct page *page, size_t size,
*/
void dma_common_free_remap(void *cpu_addr, size_t size)
{
struct page **pages = dma_common_find_pages(cpu_addr);
struct vm_struct *area = find_vm_area(cpu_addr);
if (!pages) {
if (!area || area->flags != VM_DMA_COHERENT) {
WARN(1, "trying to free invalid coherent area: %p\n", cpu_addr);
return;
}