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[12/20] misc: lattice-ecp3-config: Remove set but clearly unused variable 'ret'

Message ID 20200629140442.1043957-13-lee.jones@linaro.org (mailing list archive)
State New, archived
Headers show
Series Fix a bunch more W=1 warnings in Misc | expand

Commit Message

Lee Jones June 29, 2020, 2:04 p.m. UTC 
It's odd for the return value to be assigned to a variable so many
times, but never actually checked, but this has been the case since
the driver's inception in 2012.  If it hasn't caused any issues by
now, it's probably unlikely to.  Let's take it out, at least until
someone finds a reason to start using it.

Fixes the following W=1 kernel build warning:

 drivers/misc/lattice-ecp3-config.c: In function ‘firmware_load’:
 drivers/misc/lattice-ecp3-config.c:70:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
 70 | int ret;
 | ^~~

Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/misc/lattice-ecp3-config.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/drivers/misc/lattice-ecp3-config.c b/drivers/misc/lattice-ecp3-config.c
index 884485c3f7232..5eaf74447ca1e 100644
--- a/drivers/misc/lattice-ecp3-config.c
+++ b/drivers/misc/lattice-ecp3-config.c
@@ -67,7 +67,6 @@  static void firmware_load(const struct firmware *fw, void *context)
 	struct spi_device *spi = (struct spi_device *)context;
 	struct fpga_data *data = spi_get_drvdata(spi);
 	u8 *buffer;
-	int ret;
 	u8 txbuf[8];
 	u8 rxbuf[8];
 	int rx_len = 8;
@@ -92,7 +91,7 @@  static void firmware_load(const struct firmware *fw, void *context)
 
 	/* Trying to speak with the FPGA via SPI... */
 	txbuf[0] = FPGA_CMD_READ_ID;
-	ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+	spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
 	jedec_id = get_unaligned_be32(&rxbuf[4]);
 	dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", jedec_id);
 
@@ -110,7 +109,7 @@  static void firmware_load(const struct firmware *fw, void *context)
 	dev_info(&spi->dev, "FPGA %s detected\n", ecp3_dev[i].name);
 
 	txbuf[0] = FPGA_CMD_READ_STATUS;
-	ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+	spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
 	status = get_unaligned_be32(&rxbuf[4]);
 	dev_dbg(&spi->dev, "FPGA Status=%08x\n", status);
 
@@ -130,20 +129,20 @@  static void firmware_load(const struct firmware *fw, void *context)
 	memcpy(buffer + 4, fw->data, fw->size);
 
 	txbuf[0] = FPGA_CMD_REFRESH;
-	ret = spi_write(spi, txbuf, 4);
+	spi_write(spi, txbuf, 4);
 
 	txbuf[0] = FPGA_CMD_WRITE_EN;
-	ret = spi_write(spi, txbuf, 4);
+	spi_write(spi, txbuf, 4);
 
 	txbuf[0] = FPGA_CMD_CLEAR;
-	ret = spi_write(spi, txbuf, 4);
+	spi_write(spi, txbuf, 4);
 
 	/*
 	 * Wait for FPGA memory to become cleared
 	 */
 	for (i = 0; i < FPGA_CLEAR_LOOP_COUNT; i++) {
 		txbuf[0] = FPGA_CMD_READ_STATUS;
-		ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+		spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
 		status = get_unaligned_be32(&rxbuf[4]);
 		if (status == FPGA_STATUS_CLEARED)
 			break;
@@ -160,13 +159,13 @@  static void firmware_load(const struct firmware *fw, void *context)
 	}
 
 	dev_info(&spi->dev, "Configuring the FPGA...\n");
-	ret = spi_write(spi, buffer, fw->size + 8);
+	spi_write(spi, buffer, fw->size + 8);
 
 	txbuf[0] = FPGA_CMD_WRITE_DIS;
-	ret = spi_write(spi, txbuf, 4);
+	spi_write(spi, txbuf, 4);
 
 	txbuf[0] = FPGA_CMD_READ_STATUS;
-	ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+	spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
 	status = get_unaligned_be32(&rxbuf[4]);
 	dev_dbg(&spi->dev, "FPGA Status=%08x\n", status);