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spi: sun6i: use 'time_left' variable with wait_for_completion_timeout()

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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>
Link: https://lore.kernel.org/r/20240430114142.28551-8-wsa+renesas@sang-engineering.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Wolfram Sang 2024-04-30 13:41:39 +02:00 committed by Mark Brown
parent 34bed8a33f
commit 83a3f1ba60
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GPG Key ID: 24D68B725D5487D0
1 changed files with 9 additions and 8 deletions
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17
drivers/spi/spi-sun6i.c
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@ -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,