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Commit ffdc78ef authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[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: default avatarHans Verkuil <hans.verkuil@cisco.com>
Acked-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent b6ba2057

drivers/media/v4l2-core/videobuf2-dma-sg.c

+13 −4
Original line number Diff line number Diff line
@@ -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);