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authorMichael Hennerich <michael.hennerich@analog.com>2010-05-11 21:07:00 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-12 00:33:42 (GMT)
commitde145b44b95b9d3212a82d1c0f29b09778ef33c5 (patch)
treebfd82757bb17aa4a921932acd84c072349f178f1 /drivers
parent747388d78a0ae768fd82b55c4ed38aa646a72364 (diff)
downloadlinux-de145b44b95b9d3212a82d1c0f29b09778ef33c5.tar.xz
fbdev: bfin-t350mcqb-fb: fix fbmem allocation with blanking lines
The current allocation does not include the memory required for blanking lines. So avoid memory corruption when multiple devices are using the DMA memory near each other. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/video/bfin-t350mcqb-fb.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/video/bfin-t350mcqb-fb.c b/drivers/video/bfin-t350mcqb-fb.c
index 44e49c2..c2ec3dcd 100644
--- a/drivers/video/bfin-t350mcqb-fb.c
+++ b/drivers/video/bfin-t350mcqb-fb.c
@@ -488,9 +488,9 @@ static int __devinit bfin_t350mcqb_probe(struct platform_device *pdev)
fbinfo->fbops = &bfin_t350mcqb_fb_ops;
fbinfo->flags = FBINFO_FLAG_DEFAULT;
- info->fb_buffer =
- dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
- GFP_KERNEL);
+ info->fb_buffer = dma_alloc_coherent(NULL, fbinfo->fix.smem_len +
+ ACTIVE_VIDEO_MEM_OFFSET,
+ &info->dma_handle, GFP_KERNEL);
if (NULL == info->fb_buffer) {
printk(KERN_ERR DRIVER_NAME
@@ -568,8 +568,8 @@ out7:
out6:
fb_dealloc_cmap(&fbinfo->cmap);
out4:
- dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
- info->dma_handle);
+ dma_free_coherent(NULL, fbinfo->fix.smem_len + ACTIVE_VIDEO_MEM_OFFSET,
+ info->fb_buffer, info->dma_handle);
out3:
framebuffer_release(fbinfo);
out2:
@@ -592,8 +592,9 @@ static int __devexit bfin_t350mcqb_remove(struct platform_device *pdev)
free_irq(info->irq, info);
if (info->fb_buffer != NULL)
- dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
- info->dma_handle);
+ dma_free_coherent(NULL, fbinfo->fix.smem_len +
+ ACTIVE_VIDEO_MEM_OFFSET, info->fb_buffer,
+ info->dma_handle);
fb_dealloc_cmap(&fbinfo->cmap);