renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-22 20:23:57 +08:00
Code

ARM: dma-mapping: fix coherent arch dma_alloc_coherent()

Browse Source 
The coherent architecture dma_alloc_coherent was using kmalloc/kfree to
manage the memory.  dma_alloc_coherent() is expected to work with a
granularity of a page, so this is wrong.  Fix it by using the helper
functions now provided.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Russell King 2009-11-19 15:38:12 +00:00
parent 7a9a32a953
commit 3e82d012e9
1 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
arch/arm/mm/dma-mapping.c
View File

@ -246,14 +246,16 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gf
return memory;
if (arch_is_coherent()) {
void *virt;
struct page *page;
virt = kmalloc(size, gfp);
if (!virt)
page = __dma_alloc_buffer(dev, PAGE_ALIGN(size), gfp);
if (!page) {
*handle = ~0;
return NULL;
*handle = virt_to_dma(dev, virt);
}
return virt;
*handle = page_to_dma(dev, page);
return page_address(page);
}
return __dma_alloc(dev, size, handle, gfp,
@ -336,13 +338,13 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr
if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
return;
size = PAGE_ALIGN(size);
if (arch_is_coherent()) {
kfree(cpu_addr);
__dma_free_buffer(dma_to_page(dev, handle), size);
return;
}
size = PAGE_ALIGN(size);
c = arm_vmregion_find_remove(&consistent_head, (unsigned long)cpu_addr);
if (!c)
goto no_area;