From: Keiji Hayashibara <hayashibara.keiji@socionext.com>
Date: Wed, 26 Jun 2019 00:41:47 +0000 (+0900)
Subject: spi: uniphier: fix timeout error
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e4671df0bfd67d4864de014fa1751d5e2a56c7a6;p=openwrt%2Fstaging%2Fblogic.git

spi: uniphier: fix timeout error

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.keiji@socionext.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c
index 5a6137fe172d..c3c35c041ef1 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;
 }