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jz4740_fb: fix DMA API abuse 

Virtual addresses return from dma(m)_alloc_coherent are opaque in what
backs then, and drivers must not poke into them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
[b.zolnierkie: patch description fixup]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
This commit is contained in:
Christoph Hellwig 2019-06-21 15:13:14 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 56fc5f4820
commit 813e34adee
1 changed files with 0 additions and 7 deletions
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7
drivers/video/fbdev/jz4740_fb.c
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@ -457,7 +457,6 @@ static int jzfb_alloc_devmem(struct jzfb *jzfb)
{
int max_videosize = 0;
struct fb_videomode *mode = jzfb->pdata->modes;
void *page;
int i;
for (i = 0; i < jzfb->pdata->num_modes; ++mode, ++i) {
@ -482,12 +481,6 @@ static int jzfb_alloc_devmem(struct jzfb *jzfb)
if (!jzfb->vidmem)
goto err_free_framedesc;
for (page = jzfb->vidmem;
page < jzfb->vidmem + PAGE_ALIGN(jzfb->vidmem_size);
page += PAGE_SIZE) {
SetPageReserved(virt_to_page(page));
}
jzfb->framedesc->next = jzfb->framedesc_phys;
jzfb->framedesc->addr = jzfb->vidmem_phys;
jzfb->framedesc->id = 0xdeafbead;