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| author | Christoph Hellwig <hch@lst.de> | 2019-06-25 14:13:21 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2019-07-23 17:14:55 +0200 |
| commit | 5ae01cba59c63e042080ebccf2bd3406288beaa6 (patch) | |
| tree | 5fed2bebe824e069a1aed8a6730d7c41a72845ca /drivers/video/fbdev | |
| parent | a74cefd915124a16a2956773c30addc58e344047 (diff) | |
| download | linux-stable-5ae01cba59c63e042080ebccf2bd3406288beaa6.tar.gz linux-stable-5ae01cba59c63e042080ebccf2bd3406288beaa6.tar.bz2 linux-stable-5ae01cba59c63e042080ebccf2bd3406288beaa6.zip | |
au1200fb: don't use DMA_ATTR_NON_CONSISTENT
au1200fb allocates DMA memory using DMA_ATTR_NON_CONSISTENT, but never
calls dma_cache_sync to synchronize the memory between the CPU and the
device. If it was use on a not cache coherent bus that would be fatal,
but as far as I can tell from the naming and the mips platform
implementation it always is used in cache coherent systems. Remove
the DMA_ATTR_NON_CONSISTENT flag, which is a no-op in that case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190625121321.10197-1-hch@lst.de
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/au1200fb.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/video/fbdev/au1200fb.c b/drivers/video/fbdev/au1200fb.c index 26caffb02b7e..265d3b45efd0 100644 --- a/drivers/video/fbdev/au1200fb.c +++ b/drivers/video/fbdev/au1200fb.c @@ -1234,7 +1234,7 @@ static int au1200fb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) struct au1200fb_device *fbdev = info->par; return dma_mmap_attrs(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys, - fbdev->fb_len, DMA_ATTR_NON_CONSISTENT); + fbdev->fb_len, 0); } static void set_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata) @@ -1692,8 +1692,7 @@ static int au1200fb_drv_probe(struct platform_device *dev) fbdev->fb_mem = dmam_alloc_attrs(&dev->dev, PAGE_ALIGN(fbdev->fb_len), - &fbdev->fb_phys, GFP_KERNEL, - DMA_ATTR_NON_CONSISTENT); + &fbdev->fb_phys, GFP_KERNEL, 0); if (!fbdev->fb_mem) { print_err("fail to allocate framebuffer (size: %dK))", fbdev->fb_len / 1024); |