Messages in this thread Patch in this message | | | From | Keiji Hayashibara <> | Subject | [PATCH 2/2] spi: uniphier: fix zero-length transfer | Date | Wed, 26 Jun 2019 09:41:48 +0900 |
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The zero-length transfer results in timeout error because the transfer doesn't start. This commit modified to return success in this case.
Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com> --- drivers/spi/spi-uniphier.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c index c3c35c0..b32c77d 100644 --- a/drivers/spi/spi-uniphier.c +++ b/drivers/spi/spi-uniphier.c @@ -331,6 +331,10 @@ static int uniphier_spi_transfer_one(struct spi_master *master, 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); reinit_completion(&priv->xfer_done); -- 2.7.4
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