X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=blobdiff_plain;f=target%2Flinux%2Fipq806x%2Fpatches-4.9%2F0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch;h=ce59d492e276a43708b346e9bf29da7cd19958a7;hp=de324ffd6e047783c334265ab6e3d257c5802486;hb=9f09bd66064cd3a00631d54e579b1fb2baa0b262;hpb=bb255f74290d889b65a563bac7a4be0427fdbec8

diff --git a/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch b/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
index de324ffd6e..ce59d492e2 100644
--- a/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
+++ b/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
@@ -44,58 +44,54 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
 -	ret = spi_qup_io_config(spi, xfer);
 -	if (ret)
 -		return ret;
--
++	rx_sgl = xfer->rx_sg.sgl;
++	tx_sgl = xfer->tx_sg.sgl;
+ 
 -	/* before issuing the descriptors, set the QUP to run */
 -	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 -	if (ret) {
 -		dev_warn(qup->dev, "cannot set RUN state\n");
 -		return ret;
 -	}
--
++	do {
++		int rx_nents = 0, tx_nents = 0;
+ 
 -	if (!qup->qup_v1) {
 -		if (xfer->rx_buf)
 -			rx_done = spi_qup_dma_done;
--
++		if (rx_sgl) {
++			rx_nents = sg_nents_for_len(rx_sgl, SPI_MAX_XFER);
++			if (rx_nents < 0)
++				rx_nents = sg_nents(rx_sgl);
+ 
 -		if (xfer->tx_buf)
 -			tx_done = spi_qup_dma_done;
 -	}
--
++			qup->n_words = spi_qup_sgl_get_size(rx_sgl, rx_nents) /
++						qup->w_size;
++		}
+ 
 -	if (xfer->rx_buf) {
 -		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
 -				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
 -				      rx_done, &qup->done);
 -		if (ret)
 -			return ret;
-+	rx_sgl = xfer->rx_sg.sgl;
-+	tx_sgl = xfer->tx_sg.sgl;
++		if (tx_sgl) {
++			tx_nents = sg_nents_for_len(tx_sgl, SPI_MAX_XFER);
++			if (tx_nents < 0)
++				tx_nents = sg_nents(tx_sgl);
  
 -		dma_async_issue_pending(master->dma_rx);
 -	}
-+	do {
-+		int rx_nents = 0, tx_nents = 0;
++			qup->n_words = spi_qup_sgl_get_size(tx_sgl, tx_nents) /
++						qup->w_size;
++		}
  
 -	if (xfer->tx_buf) {
 -		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
 -				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
 -				      tx_done, &qup->dma_tx_done);
-+		if (rx_sgl) {
-+			rx_nents = sg_nents_for_len(rx_sgl, SPI_MAX_XFER);
-+			if (rx_nents < 0)
-+				rx_nents = sg_nents(rx_sgl);
-+
-+			qup->n_words = spi_qup_sgl_get_size(rx_sgl, rx_nents) /
-+						qup->w_size;
-+		}
-+
-+		if (tx_sgl) {
-+			tx_nents = sg_nents_for_len(tx_sgl, SPI_MAX_XFER);
-+			if (tx_nents < 0)
-+				tx_nents = sg_nents(tx_sgl);
-+
-+			qup->n_words = spi_qup_sgl_get_size(tx_sgl, tx_nents) /
-+						qup->w_size;
-+		}
-+
 +
 +		ret = spi_qup_io_config(spi, xfer);
  		if (ret)
@@ -109,17 +105,22 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
 +			dev_warn(qup->dev, "cannot set RUN state\n");
 +			return ret;
 +		}
-+
+ 
+-	if (xfer->rx_buf && !wait_for_completion_timeout(&qup->done, timeout))
+-		return -ETIMEDOUT;
 +		if (!qup->qup_v1) {
 +			if (rx_sgl) {
 +				rx_done = spi_qup_dma_done;
 +			}
-+
+ 
+-	if (xfer->tx_buf && !wait_for_completion_timeout(&qup->dma_tx_done, timeout))
+-		ret = -ETIMEDOUT;
 +			if (tx_sgl) {
 +				tx_done = spi_qup_dma_done;
 +			}
 +		}
-+
+ 
+-	return ret;
 +		if (rx_sgl) {
 +			ret = spi_qup_prep_sg(master, rx_sgl, rx_nents,
 +					      DMA_DEV_TO_MEM, rx_done,
@@ -149,17 +150,12 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
 +			pr_emerg(" tx timed out\n");
 +			return -ETIMEDOUT;
 +		}
- 
--	if (xfer->rx_buf && !wait_for_completion_timeout(&qup->done, timeout))
--		return -ETIMEDOUT;
++
 +		for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl));
 +		for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl));
- 
--	if (xfer->tx_buf && !wait_for_completion_timeout(&qup->dma_tx_done, timeout))
--		ret = -ETIMEDOUT;
++
 +	} while (rx_sgl || tx_sgl);
- 
--	return ret;
++
 +	return 0;
  }