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spi: use 'time_left' instead of 'timeout' with

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Merge series from Wolfram Sang <wsa+renesas@sang-engineering.com>:

There is a confusing pattern in the kernel to use a variable named 'timeout' to
store the result of wait_for_*() functions 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
obvious and self explaining.

This is part of a tree-wide series. The rest of the patches can be found here
(some parts may still be WIP):

git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/time_left

Because these patches are generated, I audit them before sending. This is why I
will send series step by step. Build bot is happy with these patches, though.
No functional changes intended.
This commit is contained in:
Mark Brown 2024-05-01 22:53:40 +09:00
commit 6be871d5fd
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
8 changed files with 45 additions and 43 deletions
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8
drivers/spi/spi-armada-3700.c
View File

@ -339,7 +339,7 @@ static irqreturn_t a3700_spi_interrupt(int irq, void *dev_id)
static bool a3700_spi_wait_completion(struct spi_device *spi)
{
struct a3700_spi *a3700_spi;
unsigned int timeout;
unsigned long time_left;
unsigned int ctrl_reg;
unsigned long timeout_jiffies;
@ -361,12 +361,12 @@ static bool a3700_spi_wait_completion(struct spi_device *spi)
a3700_spi->wait_mask);
timeout_jiffies = msecs_to_jiffies(A3700_SPI_TIMEOUT);
timeout = wait_for_completion_timeout(&a3700_spi->done,
timeout_jiffies);
time_left = wait_for_completion_timeout(&a3700_spi->done,
timeout_jiffies);
a3700_spi->wait_mask = 0;
if (timeout)
if (time_left)
return true;
/* there might be the case that right after we checked the

14
drivers/spi/spi-fsl-lpspi.c
View File

@ -553,7 +553,7 @@ static int fsl_lpspi_dma_transfer(struct spi_controller *controller,
{
struct dma_async_tx_descriptor *desc_tx, *desc_rx;
unsigned long transfer_timeout;
unsigned long timeout;
unsigned long time_left;
struct sg_table *tx = &transfer->tx_sg, *rx = &transfer->rx_sg;
int ret;
@ -594,9 +594,9 @@ static int fsl_lpspi_dma_transfer(struct spi_controller *controller,
transfer->len);
/* Wait eDMA to finish the data transfer.*/
timeout = wait_for_completion_timeout(&fsl_lpspi->dma_tx_completion,
transfer_timeout);
if (!timeout) {
time_left = wait_for_completion_timeout(&fsl_lpspi->dma_tx_completion,
transfer_timeout);
if (!time_left) {
dev_err(fsl_lpspi->dev, "I/O Error in DMA TX\n");
dmaengine_terminate_all(controller->dma_tx);
dmaengine_terminate_all(controller->dma_rx);
@ -604,9 +604,9 @@ static int fsl_lpspi_dma_transfer(struct spi_controller *controller,
return -ETIMEDOUT;
}
timeout = wait_for_completion_timeout(&fsl_lpspi->dma_rx_completion,
transfer_timeout);
if (!timeout) {
time_left = wait_for_completion_timeout(&fsl_lpspi->dma_rx_completion,
transfer_timeout);
if (!time_left) {
dev_err(fsl_lpspi->dev, "I/O Error in DMA RX\n");
dmaengine_terminate_all(controller->dma_tx);
dmaengine_terminate_all(controller->dma_rx);

20
drivers/spi/spi-imx.c
View File

@ -1405,7 +1405,7 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
{
struct dma_async_tx_descriptor *desc_tx, *desc_rx;
unsigned long transfer_timeout;
unsigned long timeout;
unsigned long time_left;
struct spi_controller *controller = spi_imx->controller;
struct sg_table *tx = &transfer->tx_sg, *rx = &transfer->rx_sg;
struct scatterlist *last_sg = sg_last(rx->sgl, rx->nents);
@ -1471,18 +1471,18 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
transfer_timeout = spi_imx_calculate_timeout(spi_imx, transfer->len);
/* Wait SDMA to finish the data transfer.*/
timeout = wait_for_completion_timeout(&spi_imx->dma_tx_completion,
time_left = wait_for_completion_timeout(&spi_imx->dma_tx_completion,
transfer_timeout);
if (!timeout) {
if (!time_left) {
dev_err(spi_imx->dev, "I/O Error in DMA TX\n");
dmaengine_terminate_all(controller->dma_tx);
dmaengine_terminate_all(controller->dma_rx);
return -ETIMEDOUT;
}
timeout = wait_for_completion_timeout(&spi_imx->dma_rx_completion,
transfer_timeout);
if (!timeout) {
time_left = wait_for_completion_timeout(&spi_imx->dma_rx_completion,
transfer_timeout);
if (!time_left) {
dev_err(&controller->dev, "I/O Error in DMA RX\n");
spi_imx->devtype_data->reset(spi_imx);
dmaengine_terminate_all(controller->dma_rx);
@ -1501,7 +1501,7 @@ static int spi_imx_pio_transfer(struct spi_device *spi,
{
struct spi_imx_data *spi_imx = spi_controller_get_devdata(spi->controller);
unsigned long transfer_timeout;
unsigned long timeout;
unsigned long time_left;
spi_imx->tx_buf = transfer->tx_buf;
spi_imx->rx_buf = transfer->rx_buf;
@ -1517,9 +1517,9 @@ static int spi_imx_pio_transfer(struct spi_device *spi,
transfer_timeout = spi_imx_calculate_timeout(spi_imx, transfer->len);
timeout = wait_for_completion_timeout(&spi_imx->xfer_done,
transfer_timeout);
if (!timeout) {
time_left = wait_for_completion_timeout(&spi_imx->xfer_done,
transfer_timeout);
if (!time_left) {
dev_err(&spi->dev, "I/O Error in PIO\n");
spi_imx->devtype_data->reset(spi_imx);
return -ETIMEDOUT;

6
drivers/spi/spi-pic32-sqi.c
View File

@ -344,7 +344,7 @@ static int pic32_sqi_one_message(struct spi_controller *host,
struct spi_transfer *xfer;
struct pic32_sqi *sqi;
int ret = 0, mode;
unsigned long timeout;
unsigned long time_left;
u32 val;
sqi = spi_controller_get_devdata(host);
@ -410,8 +410,8 @@ static int pic32_sqi_one_message(struct spi_controller *host,
writel(val, sqi->regs + PESQI_BD_CTRL_REG);
/* wait for xfer completion */
timeout = wait_for_completion_timeout(&sqi->xfer_done, 5 * HZ);
if (timeout == 0) {
time_left = wait_for_completion_timeout(&sqi->xfer_done, 5 * HZ);
if (time_left == 0) {
dev_err(&sqi->host->dev, "wait timedout/interrupted\n");
ret = -ETIMEDOUT;
msg->status = ret;

6
drivers/spi/spi-pic32.c
View File

@ -498,7 +498,7 @@ static int pic32_spi_one_transfer(struct spi_controller *host,
{
struct pic32_spi *pic32s;
bool dma_issued = false;
unsigned long timeout;
unsigned long time_left;
int ret;
pic32s = spi_controller_get_devdata(host);
@ -545,8 +545,8 @@ static int pic32_spi_one_transfer(struct spi_controller *host,
}
/* wait for completion */
timeout = wait_for_completion_timeout(&pic32s->xfer_done, 2 * HZ);
if (timeout == 0) {
time_left = wait_for_completion_timeout(&pic32s->xfer_done, 2 * HZ);
if (time_left == 0) {
dev_err(&spi->dev, "wait error/timedout\n");
if (dma_issued) {
dmaengine_terminate_all(host->dma_rx);

9
drivers/spi/spi-sun4i.c
View File

@ -206,7 +206,8 @@ static int sun4i_spi_transfer_one(struct spi_controller *host,
struct spi_transfer *tfr)
{
struct sun4i_spi *sspi = spi_controller_get_devdata(host);
unsigned int mclk_rate, div, timeout;
unsigned int mclk_rate, div;
unsigned long time_left;
unsigned int start, end, tx_time;
unsigned int tx_len = 0;
int ret = 0;
@ -327,10 +328,10 @@ static int sun4i_spi_transfer_one(struct spi_controller *host,
tx_time = max(tfr->len * 8 * 2 / (tfr->speed_hz / 1000), 100U);
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));
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,

17
drivers/spi/spi-sun6i.c
View File

@ -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,

8
drivers/spi/spi-xlp.c
View File

@ -270,7 +270,7 @@ static int xlp_spi_xfer_block(struct xlp_spi_priv *xs,
const unsigned char *tx_buf,
unsigned char *rx_buf, int xfer_len, int cmd_cont)
{
int timeout;
unsigned long time_left;
u32 intr_mask = 0;
xs->tx_buf = tx_buf;
@ -299,11 +299,11 @@ static int xlp_spi_xfer_block(struct xlp_spi_priv *xs,
intr_mask |= XLP_SPI_INTR_DONE;
xlp_spi_reg_write(xs, xs->cs, XLP_SPI_INTR_EN, intr_mask);
timeout = wait_for_completion_timeout(&xs->done,
msecs_to_jiffies(1000));
time_left = wait_for_completion_timeout(&xs->done,
msecs_to_jiffies(1000));
/* Disable interrupts */
xlp_spi_reg_write(xs, xs->cs, XLP_SPI_INTR_EN, 0x0);
if (!timeout) {
if (!time_left) {
dev_err(&xs->dev, "xfer timedout!\n");
goto out;
}