Hello,
On 3/8/2013 10:21 AM, Hans Verkuil wrote:
From: Hans Verkuil <hans.verk...@cisco.com>
This prevents the kernel log from being spammed with these messages.
By turning on the debug option you will see them again.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Acked-by: Marek Szyprowski <m.szyprow...@samsung.com>
---
drivers/media/v4l2-core/videobuf2-dma-sg.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c
b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index 952776f..59522b2 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -21,6 +21,15 @@
#include <media/videobuf2-memops.h>
#include <media/videobuf2-dma-sg.h>
+static int debug;
+module_param(debug, int, 0644);
+
+#define dprintk(level, fmt, arg...) \
+ do { \
+ if (debug >= level) \
+ printk(KERN_DEBUG "vb2-dma-sg: " fmt, ## arg); \
+ } while (0)
+
struct vb2_dma_sg_buf {
void *vaddr;
struct page **pages;
@@ -74,7 +83,7 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long
size, gfp_t gfp_fla
atomic_inc(&buf->refcount);
- printk(KERN_DEBUG "%s: Allocated buffer of %d pages\n",
+ dprintk(1, "%s: Allocated buffer of %d pages\n",
__func__, buf->sg_desc.num_pages);
return buf;
@@ -97,7 +106,7 @@ static void vb2_dma_sg_put(void *buf_priv)
int i = buf->sg_desc.num_pages;
if (atomic_dec_and_test(&buf->refcount)) {
- printk(KERN_DEBUG "%s: Freeing buffer of %d pages\n", __func__,
+ dprintk(1, "%s: Freeing buffer of %d pages\n", __func__,
buf->sg_desc.num_pages);
if (buf->vaddr)
vm_unmap_ram(buf->vaddr, buf->sg_desc.num_pages);
@@ -163,7 +172,7 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx,
unsigned long vaddr,
return buf;
userptr_fail_get_user_pages:
- printk(KERN_DEBUG "get_user_pages requested/got: %d/%d]\n",
+ dprintk(1, "get_user_pages requested/got: %d/%d]\n",
num_pages_from_user, buf->sg_desc.num_pages);
while (--num_pages_from_user >= 0)
put_page(buf->pages[num_pages_from_user]);
@@ -186,7 +195,7 @@ static void vb2_dma_sg_put_userptr(void *buf_priv)
struct vb2_dma_sg_buf *buf = buf_priv;
int i = buf->sg_desc.num_pages;
- printk(KERN_DEBUG "%s: Releasing userspace buffer of %d pages\n",
+ dprintk(1, "%s: Releasing userspace buffer of %d pages\n",
__func__, buf->sg_desc.num_pages);
if (buf->vaddr)
vm_unmap_ram(buf->vaddr, buf->sg_desc.num_pages);
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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