[PATCH v2 1/6] spi: core: handle timeout error from transfer_one()

[Sergey Suloev]

As long as sun4i/sun6i SPI drivers have overriden the default
"wait for completion" procedure then we need to properly
handle -ETIMEDOUT error from transfer_one().

Signed-off-by: Sergey Suloev <ssul...@orpaltech.com>
---
 drivers/spi/spi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b33a727..2dcd4f6 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1028,7 +1028,7 @@ static int spi_transfer_one_message(struct spi_controller 
*ctlr,
                        reinit_completion(&ctlr->xfer_completion);
 
                        ret = ctlr->transfer_one(ctlr, msg->spi, xfer);
-                       if (ret < 0) {
+                       if (ret < 0 && ret != -ETIMEDOUT) {
                                SPI_STATISTICS_INCREMENT_FIELD(statm,
                                                               errors);
                                SPI_STATISTICS_INCREMENT_FIELD(stats,
@@ -1051,7 +1051,7 @@ static int spi_transfer_one_message(struct spi_controller 
*ctlr,
                                                                 
msecs_to_jiffies(ms));
                        }
 
-                       if (ms == 0) {
+                       if (ms == 0 || ret == -ETIMEDOUT) {
                                SPI_STATISTICS_INCREMENT_FIELD(statm,
                                                               timedout);
                                SPI_STATISTICS_INCREMENT_FIELD(stats,
@@ -1059,6 +1059,7 @@ static int spi_transfer_one_message(struct spi_controller 
*ctlr,
                                dev_err(&msg->spi->dev,
                                        "SPI transfer timed out\n");
                                msg->status = -ETIMEDOUT;
+                               ret = 0;
                        }
                } else {
                        if (xfer->len)
-- 
2.16.2