From: Hans Verkuil Date: Sat, 2 Mar 2013 08:12:08 +0000 (-0300) Subject: [media] vb2-dma-sg: add debug module option X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ffdc78efe1a8a013036aa7a63402f2708ed4f483;p=linux-beck.git [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 Acked-by: Marek Szyprowski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c index 952776fafe2c..59522b2ebae1 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c @@ -21,6 +21,15 @@ #include #include +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);