From: Philipp Zabel Date: Wed, 25 Mar 2015 16:45:09 +0000 (-0300) Subject: [media] coda: drop dma_sync_single_for_device in coda_bitstream_queue X-Git-Tag: firefly_0821_release~176^2~795^2~1007 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8191919bff678ae16050c60e1f86355d7731ac73;p=firefly-linux-kernel-4.4.55.git [media] coda: drop dma_sync_single_for_device in coda_bitstream_queue Issuing a cache flush for the whole bitstream buffer is not optimal in the first place when only a part of it was written. But given that the buffer is mapped in writecombine mode, it is not needed at all. Signed-off-by: Philipp Zabel Tested-by: Ian Molton Signed-off-by: Kamil Debski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c index d39789d59d17..d336cb66b42b 100644 --- a/drivers/media/platform/coda/coda-bit.c +++ b/drivers/media/platform/coda/coda-bit.c @@ -181,10 +181,6 @@ static int coda_bitstream_queue(struct coda_ctx *ctx, if (n < src_size) return -ENOSPC; - dma_sync_single_for_device(&ctx->dev->plat_dev->dev, - ctx->bitstream.paddr, ctx->bitstream.size, - DMA_TO_DEVICE); - src_buf->v4l2_buf.sequence = ctx->qsequence++; return 0;