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[v2,7/8] spi: sun6i: use 'time_left' variable with wait_for_completion_timeout()

Message ID 20240430114142.28551-8-wsa+renesas@sang-engineering.com (mailing list archive)
State New, archived
Headers show
Series spi: use 'time_left' instead of 'timeout' with wait_for_*() functions | expand

Commit Message

Wolfram Sang April 30, 2024, 11:41 a.m. UTC 
There is a confusing pattern in the kernel to use a variable named 'timeout' to
store the result of wait_for_completion_timeout() causing patterns like:

	timeout = wait_for_completion_timeout(...)
	if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the code
self explaining.

Fix to the proper variable type 'unsigned long' while here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/spi/spi-sun6i.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index cd018ea1abf1..5c26bf056293 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -277,7 +277,8 @@  static int sun6i_spi_transfer_one(struct spi_controller *host,
 				  struct spi_transfer *tfr)
 {
 	struct sun6i_spi *sspi = spi_controller_get_devdata(host);
-	unsigned int div, div_cdr1, div_cdr2, timeout;
+	unsigned int div, div_cdr1, div_cdr2;
+	unsigned long time_left;
 	unsigned int start, end, tx_time;
 	unsigned int trig_level;
 	unsigned int tx_len = 0, rx_len = 0, nbits = 0;
@@ -488,26 +489,26 @@  static int sun6i_spi_transfer_one(struct spi_controller *host,
 
 	tx_time = spi_controller_xfer_timeout(host, tfr);
 	start = jiffies;
-	timeout = wait_for_completion_timeout(&sspi->done,
-					      msecs_to_jiffies(tx_time));
+	time_left = wait_for_completion_timeout(&sspi->done,
+						msecs_to_jiffies(tx_time));
 
 	if (!use_dma) {
 		sun6i_spi_drain_fifo(sspi);
 	} else {
-		if (timeout && rx_len) {
+		if (time_left && rx_len) {
 			/*
 			 * Even though RX on the peripheral side has finished
 			 * RX DMA might still be in flight
 			 */
-			timeout = wait_for_completion_timeout(&sspi->dma_rx_done,
-							      timeout);
-			if (!timeout)
+			time_left = wait_for_completion_timeout(&sspi->dma_rx_done,
+								time_left);
+			if (!time_left)
 				dev_warn(&host->dev, "RX DMA timeout\n");
 		}
 	}
 
 	end = jiffies;
-	if (!timeout) {
+	if (!time_left) {
 		dev_warn(&host->dev,
 			 "%s: timeout transferring %u bytes@%iHz for %i(%i)ms",
 			 dev_name(&spi->dev), tfr->len, tfr->speed_hz,