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authorHans Verkuil <hans.verkuil@cisco.com>2013-03-02 05:12:08 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-03-21 13:25:15 -0300
commitffdc78efe1a8a013036aa7a63402f2708ed4f483 (patch)
tree98e3749f7906b381e808454a14d50e1b89644111 /drivers/media/v4l2-core
parentb6ba2057f7823352bbc44ee846faa03b36e8b6ac (diff)
[media] vb2-dma-sg: add debug module option
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.verkuil@cisco.com> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/v4l2-core')
-rw-r--r--drivers/media/v4l2-core/videobuf2-dma-sg.c17
1 files 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 952776fafe2..59522b2ebae 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);