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[media] vb2-dma-sg: add debug module option

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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>
This commit is contained in:
Hans Verkuil 2013-03-02 05:12:08 -03:00 committed by Mauro Carvalho Chehab
parent b6ba2057f7
commit ffdc78efe1
1 changed files with 13 additions and 4 deletions
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17
drivers/media/v4l2-core/videobuf2-dma-sg.c
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@ -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);