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authorAndy Walls <awalls@radix.net>2009-11-11 00:57:16 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-12-05 18:41:53 -0200
commitad689d54f979233c024c25a2221f4fd6f56543fe (patch)
treed28f3cb3958b387362c562c83ae5966e0a8874d9 /drivers/media/video
parent127ce5f0adcca71eeeed2386ed4742ea6363a063 (diff)
V4L/DVB (13433): cx18: Remove duplicate list traversal when processing incoming MDLs
Update the incoming MDL's buffers' bytesused and sync the buffers for the cpu in one pass instead of two. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video')
-rw-r--r--drivers/media/video/cx18/cx18-queue.c27
-rw-r--r--drivers/media/video/cx18/cx18-queue.h13
2 files changed, 8 insertions, 32 deletions
diff --git a/drivers/media/video/cx18/cx18-queue.c b/drivers/media/video/cx18/cx18-queue.c
index f2d539f6bdf..63304823cef 100644
--- a/drivers/media/video/cx18/cx18-queue.c
+++ b/drivers/media/video/cx18/cx18-queue.c
@@ -100,8 +100,8 @@ struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q)
return mdl;
}
-static void _cx18_mdl_set_buf_bytesused(struct cx18_stream *s,
- struct cx18_mdl *mdl)
+static void _cx18_mdl_update_bufs_for_cpu(struct cx18_stream *s,
+ struct cx18_mdl *mdl)
{
struct cx18_buffer *buf;
u32 buf_size = s->buf_size;
@@ -116,11 +116,12 @@ static void _cx18_mdl_set_buf_bytesused(struct cx18_stream *s,
buf->bytesused = bytesused;
bytesused = 0;
}
+ cx18_buf_sync_for_cpu(s, buf);
}
}
-static inline void cx18_mdl_set_buf_bytesused(struct cx18_stream *s,
- struct cx18_mdl *mdl)
+static inline void cx18_mdl_update_bufs_for_cpu(struct cx18_stream *s,
+ struct cx18_mdl *mdl)
{
struct cx18_buffer *buf;
@@ -129,8 +130,9 @@ static inline void cx18_mdl_set_buf_bytesused(struct cx18_stream *s,
list);
buf->bytesused = mdl->bytesused;
buf->readpos = 0;
+ cx18_buf_sync_for_cpu(s, buf);
} else {
- _cx18_mdl_set_buf_bytesused(s, mdl);
+ _cx18_mdl_update_bufs_for_cpu(s, mdl);
}
}
@@ -191,8 +193,7 @@ struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id,
ret->bytesused = bytesused;
ret->skipped = 0;
/* 0'ed readpos, m_flags & curr_buf when mdl went on q_busy */
- cx18_mdl_set_buf_bytesused(s, ret);
- cx18_mdl_sync_for_cpu(s, ret);
+ cx18_mdl_update_bufs_for_cpu(s, ret);
if (s->type != CX18_ENC_STREAM_TYPE_TS)
set_bit(CX18_F_M_NEED_SWAP, &ret->m_flags);
}
@@ -331,18 +332,6 @@ void cx18_load_queues(struct cx18_stream *s)
}
}
-void _cx18_mdl_sync_for_cpu(struct cx18_stream *s, struct cx18_mdl *mdl)
-{
- int dma = s->dma;
- u32 buf_size = s->buf_size;
- struct pci_dev *pci_dev = s->cx->pci_dev;
- struct cx18_buffer *buf;
-
- list_for_each_entry(buf, &mdl->buf_list, list)
- pci_dma_sync_single_for_cpu(pci_dev, buf->dma_handle,
- buf_size, dma);
-}
-
void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl)
{
int dma = s->dma;
diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h
index 96747e5e7c3..88a6d34ad3b 100644
--- a/drivers/media/video/cx18/cx18-queue.h
+++ b/drivers/media/video/cx18/cx18-queue.h
@@ -33,19 +33,6 @@ static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
s->buf_size, s->dma);
}
-void _cx18_mdl_sync_for_cpu(struct cx18_stream *s, struct cx18_mdl *mdl);
-
-static inline void cx18_mdl_sync_for_cpu(struct cx18_stream *s,
- struct cx18_mdl *mdl)
-{
- if (list_is_singular(&mdl->buf_list))
- cx18_buf_sync_for_cpu(s, list_first_entry(&mdl->buf_list,
- struct cx18_buffer,
- list));
- else
- _cx18_mdl_sync_for_cpu(s, mdl);
-}
-
static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
struct cx18_buffer *buf)
{