diff options
Diffstat (limited to 'drivers/spi/spi-uniphier.c')
| -rw-r--r-- | drivers/spi/spi-uniphier.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c index 5a6137fe172d..b32c77df5d49 100644 --- a/drivers/spi/spi-uniphier.c +++ b/drivers/spi/spi-uniphier.c @@ -328,7 +328,12 @@ static int uniphier_spi_transfer_one(struct spi_master *master, struct spi_transfer *t) { struct uniphier_spi_priv *priv = spi_master_get_devdata(master); - int status; + struct device *dev = master->dev.parent; + unsigned long time_left; + + /* Terminate and return success for 0 byte length transfer */ + if (!t->len) + return 0; uniphier_spi_setup_transfer(spi, t); @@ -338,13 +343,15 @@ static int uniphier_spi_transfer_one(struct spi_master *master, uniphier_spi_irq_enable(spi, SSI_IE_RCIE | SSI_IE_RORIE); - status = wait_for_completion_timeout(&priv->xfer_done, - msecs_to_jiffies(SSI_TIMEOUT_MS)); + time_left = wait_for_completion_timeout(&priv->xfer_done, + msecs_to_jiffies(SSI_TIMEOUT_MS)); uniphier_spi_irq_disable(spi, SSI_IE_RCIE | SSI_IE_RORIE); - if (status < 0) - return status; + if (!time_left) { + dev_err(dev, "transfer timeout.\n"); + return -ETIMEDOUT; + } return priv->error; } |