[PATCH 1/2] spi: uniphier: fix timeout error

[Keiji Hayashibara]

Timeout error was silently ignored.
This commit adds timeout error handling and modifies return type of
wait_for_completion_timeout().

Signed-off-by: Keiji Hayashibara <hayashibara.ke...@socionext.com>
---
 drivers/spi/spi-uniphier.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c
index 5a6137f..c3c35c0 100644
--- a/drivers/spi/spi-uniphier.c
+++ b/drivers/spi/spi-uniphier.c
@@ -328,7 +328,8 @@ 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;
 
        uniphier_spi_setup_transfer(spi, t);
 
@@ -338,13 +339,15 @@ 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;
 }
-- 
2.7.4