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From: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
To: "Mark Brown" <broonie@kernel.org>,
	"Michal Simek" <michal.simek@xilinx.com>,
	"Sören Brinkmann" <soren.brinkmann@xilinx.com>,
	linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Subject: [PATCH 17/18] spi/xilinx: Remove remaining_words driver data variable
Date: Fri, 23 Jan 2015 17:08:49 +0100	[thread overview]
Message-ID: <1422029330-10971-18-git-send-email-ricardo.ribalda@gmail.com> (raw)
In-Reply-To: <1422029330-10971-1-git-send-email-ricardo.ribalda@gmail.com>

The variable never leaves the scope of txrx_bufs.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/spi/spi-xilinx.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 8c25c59..026f4c5 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -86,7 +86,6 @@ struct xilinx_spi {
 
 	u8 *rx_ptr;		/* pointer in the Tx buffer */
 	const u8 *tx_ptr;	/* pointer in the Rx buffer */
-	int remaining_words;	/* the number of words left to transfer */
 	u8 bytes_per_word;
 	int buffer_size;	/* buffer size in words */
 	u32 cs_inactive;	/* Level of the CS pins when inactive*/
@@ -209,33 +208,27 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi,
 	return 0;
 }
 
-static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi, int n_words)
-{
-	xspi->remaining_words -= n_words;
-
-	while (n_words--)
-		xilinx_spi_tx(xspi);
-	return;
-}
-
 static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
 {
 	struct xilinx_spi *xspi = spi_master_get_devdata(spi->master);
+	int remaining_words;	/* the number of words left to transfer */
 
 	/* We get here with transmitter inhibited */
 
 	xspi->tx_ptr = t->tx_buf;
 	xspi->rx_ptr = t->rx_buf;
-	xspi->remaining_words = t->len / xspi->bytes_per_word;
+	remaining_words = t->len / xspi->bytes_per_word;
 	reinit_completion(&xspi->done);
 
-	while (xspi->remaining_words) {
+	while (remaining_words) {
 		u16 cr = 0;
-		int n_words;
+		int n_words, tx_words, rx_words;
 
-		n_words = min(xspi->remaining_words, xspi->buffer_size);
+		n_words = min(remaining_words, xspi->buffer_size);
 
-		xilinx_spi_fill_tx_fifo(xspi, n_words);
+		tx_words = n_words;
+		while (tx_words--)
+			xilinx_spi_tx(xspi);
 
 		/* Start the transfer by not inhibiting the transmitter any
 		 * longer
@@ -261,8 +254,11 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
 			       xspi->regs + XSPI_CR_OFFSET);
 
 		/* Read out all the data from the Rx FIFO */
-		while (n_words--)
+		rx_words = n_words;
+		while (rx_words--)
 			xilinx_spi_rx(xspi);
+
+		remaining_words -= n_words;
 	}
 
 	return t->len;
-- 
2.1.4


  parent reply	other threads:[~2015-01-23 16:10 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-23 16:08 [PATCH 00/18] spi/xilinx: Speed-up Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 01/18] spi/xilinx: Support for spi mode LSB_FIRST Ricardo Ribalda Delgado
2015-01-26 19:23   ` Mark Brown
2015-01-23 16:08 ` [PATCH 02/18] spi/xilinx: Support for spi mode LOOP Ricardo Ribalda Delgado
2015-01-26 19:23   ` Mark Brown
2015-01-23 16:08 ` [PATCH 03/18] spi/xilinx: Simplify data read from the Rx FIFO Ricardo Ribalda Delgado
2015-01-27 17:25   ` Mark Brown
2015-01-23 16:08 ` [PATCH 04/18] spi-xilinx: Simplify spi_fill_tx_fifo Ricardo Ribalda Delgado
2015-01-26 23:54   ` Mark Brown
2015-01-23 16:08 ` [PATCH 05/18] spi/xilinx: Leave the IRQ always enabled Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 06/18] spi/xilinx: Code cleanup Ricardo Ribalda Delgado
2015-01-27  0:05   ` Mark Brown
2015-01-23 16:08 ` [PATCH 07/18] spi/xilinx: Use cached value of register Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 08/18] spi/xilinx: Support cores with no interrupt Ricardo Ribalda Delgado
2015-01-27  0:04   ` Mark Brown
2015-01-27 19:05     ` Ricardo Ribalda Delgado
2015-01-27 19:49       ` Mark Brown
2015-01-27 19:56         ` Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 09/18] spi/xilinx: Do not inhibit transmission in polling mode Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 10/18] spi/xilinx: Support for spi mode CS_HIGH Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 11/18] spi/xilinx: Remove rx_fn and tx_fn pointer Ricardo Ribalda Delgado
2015-01-27  0:09   ` Mark Brown
2015-01-27 10:00     ` Ricardo Ribalda Delgado
2015-01-27 15:42       ` Joe Perches
2015-01-27 19:07         ` Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 12/18] spi/xilinx: Make spi_tx and spi_rx simmetric Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 13/18] spi/xilinx: Convert remainding_bytes in remaining words Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 14/18] spi/xilinx: Convert bits_per_word in bytes_per_word Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 15/18] spi/xilinx: Remove iowrite/ioread wrappers Ricardo Ribalda Delgado
2015-01-23 16:08 ` [PATCH 16/18] spi/xilinx: Reset core before buffer_size detection Ricardo Ribalda Delgado
2015-01-27  0:11   ` Mark Brown
2015-01-23 16:08 ` Ricardo Ribalda Delgado [this message]
2015-01-23 16:08 ` [PATCH 18/18] spi/xilinx: Check number of slaves range Ricardo Ribalda Delgado
2015-01-27  0:14 ` [PATCH 00/18] spi/xilinx: Speed-up Mark Brown
2015-01-27 10:17   ` Ricardo Ribalda Delgado
2015-01-27 11:59     ` Mark Brown

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