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Diffstat (limited to 'drivers/media/video/saa7164/saa7164-buffer.c')
-rw-r--r--drivers/media/video/saa7164/saa7164-buffer.c92
1 files changed, 45 insertions, 47 deletions
diff --git a/drivers/media/video/saa7164/saa7164-buffer.c b/drivers/media/video/saa7164/saa7164-buffer.c
index 7230912acc7..ddd25211c9e 100644
--- a/drivers/media/video/saa7164/saa7164-buffer.c
+++ b/drivers/media/video/saa7164/saa7164-buffer.c
@@ -24,46 +24,46 @@
#include "saa7164.h"
/* The PCI address space for buffer handling looks like this:
-
- +-u32 wide-------------+
- | +
- +-u64 wide------------------------------------+
- + +
- +----------------------+
- | CurrentBufferPtr + Pointer to current PCI buffer >-+
- +----------------------+ |
- | Unused + |
- +----------------------+ |
- | Pitch + = 188 (bytes) |
- +----------------------+ |
- | PCI buffer size + = pitch * number of lines (312) |
- +----------------------+ |
- |0| Buf0 Write Offset + |
- +----------------------+ v
- |1| Buf1 Write Offset + |
- +----------------------+ |
- |2| Buf2 Write Offset + |
- +----------------------+ |
- |3| Buf3 Write Offset + |
- +----------------------+ |
- ... More write offsets |
- +---------------------------------------------+ |
- +0| set of ptrs to PCI pagetables + |
- +---------------------------------------------+ |
- +1| set of ptrs to PCI pagetables + <--------+
- +---------------------------------------------+
- +2| set of ptrs to PCI pagetables +
- +---------------------------------------------+
- +3| set of ptrs to PCI pagetables + >--+
- +---------------------------------------------+ |
- ... More buffer pointers | +----------------+
- +->| pt[0] TS data |
- | +----------------+
- |
- | +----------------+
- +->| pt[1] TS data |
- | +----------------+
- | etc
+ *
+ * +-u32 wide-------------+
+ * | +
+ * +-u64 wide------------------------------------+
+ * + +
+ * +----------------------+
+ * | CurrentBufferPtr + Pointer to current PCI buffer >-+
+ * +----------------------+ |
+ * | Unused + |
+ * +----------------------+ |
+ * | Pitch + = 188 (bytes) |
+ * +----------------------+ |
+ * | PCI buffer size + = pitch * number of lines (312) |
+ * +----------------------+ |
+ * |0| Buf0 Write Offset + |
+ * +----------------------+ v
+ * |1| Buf1 Write Offset + |
+ * +----------------------+ |
+ * |2| Buf2 Write Offset + |
+ * +----------------------+ |
+ * |3| Buf3 Write Offset + |
+ * +----------------------+ |
+ * ... More write offsets |
+ * +---------------------------------------------+ |
+ * +0| set of ptrs to PCI pagetables + |
+ * +---------------------------------------------+ |
+ * +1| set of ptrs to PCI pagetables + <--------+
+ * +---------------------------------------------+
+ * +2| set of ptrs to PCI pagetables +
+ * +---------------------------------------------+
+ * +3| set of ptrs to PCI pagetables + >--+
+ * +---------------------------------------------+ |
+ * ... More buffer pointers | +----------------+
+ * +->| pt[0] TS data |
+ * | +----------------+
+ * |
+ * | +----------------+
+ * +->| pt[1] TS data |
+ * | +----------------+
+ * | etc
*/
void saa7164_buffer_display(struct saa7164_buffer *buf)
@@ -283,7 +283,8 @@ int saa7164_buffer_cfg_port(struct saa7164_port *port)
return 0;
}
-struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev, u32 len)
+struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev,
+ u32 len)
{
struct saa7164_user_buffer *buf;
@@ -313,12 +314,9 @@ void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf)
if (!buf)
return;
- if (buf->data) {
- kfree(buf->data);
- buf->data = 0;
- }
+ kfree(buf->data);
+ buf->data = 0;
- if (buf)
- kfree(buf);
+ kfree(buf);
}