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path: root/drivers/video/mx3fb.c
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Diffstat (limited to 'drivers/video/mx3fb.c')
-rw-r--r--drivers/video/mx3fb.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index b7af5256e88..567fb944bd2 100644
--- a/drivers/video/mx3fb.c
+++ b/drivers/video/mx3fb.c
@@ -669,7 +669,7 @@ static uint32_t bpp_to_pixfmt(int bpp)
}
static int mx3fb_blank(int blank, struct fb_info *fbi);
-static int mx3fb_map_video_memory(struct fb_info *fbi);
+static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len);
static int mx3fb_unmap_video_memory(struct fb_info *fbi);
/**
@@ -742,8 +742,7 @@ static int mx3fb_set_par(struct fb_info *fbi)
if (fbi->fix.smem_start)
mx3fb_unmap_video_memory(fbi);
- fbi->fix.smem_len = mem_len;
- if (mx3fb_map_video_memory(fbi) < 0) {
+ if (mx3fb_map_video_memory(fbi, mem_len) < 0) {
mutex_unlock(&mx3_fbi->mutex);
return -ENOMEM;
}
@@ -1198,6 +1197,7 @@ static int mx3fb_resume(struct platform_device *pdev)
/**
* mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
* @fbi: framebuffer information pointer
+ * @mem_len: length of mapped memory
* @return: Error code indicating success or failure
*
* This buffer is remapped into a non-cached, non-buffered, memory region to
@@ -1205,23 +1205,26 @@ static int mx3fb_resume(struct platform_device *pdev)
* area is remapped, all virtual memory access to the video memory should occur
* at the new region.
*/
-static int mx3fb_map_video_memory(struct fb_info *fbi)
+static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len)
{
int retval = 0;
dma_addr_t addr;
fbi->screen_base = dma_alloc_writecombine(fbi->device,
- fbi->fix.smem_len,
+ mem_len,
&addr, GFP_DMA);
if (!fbi->screen_base) {
dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
- fbi->fix.smem_len);
+ mem_len);
retval = -EBUSY;
goto err0;
}
+ mutex_lock(&fbi->mm_lock);
fbi->fix.smem_start = addr;
+ fbi->fix.smem_len = mem_len;
+ mutex_unlock(&fbi->mm_lock);
dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
(uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
@@ -1251,8 +1254,10 @@ static int mx3fb_unmap_video_memory(struct fb_info *fbi)
fbi->screen_base, fbi->fix.smem_start);
fbi->screen_base = 0;
+ mutex_lock(&fbi->mm_lock);
fbi->fix.smem_start = 0;
fbi->fix.smem_len = 0;
+ mutex_unlock(&fbi->mm_lock);
return 0;
}