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| author | Keiji Hayashibara <hayashibara.keiji@socionext.com> | 2019-06-26 03:41:48 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-06-26 14:30:58 +0300 |
| commit | 2b947137f2b8f77474dfe77d68c52778bf6ae453 (patch) | |
| tree | 3daf0a519b81c71aa9a59968cbc537067e787460 /drivers/spi | |
| parent | e4671df0bfd67d4864de014fa1751d5e2a56c7a6 (diff) | |
| download | linux-2b947137f2b8f77474dfe77d68c52778bf6ae453.tar.xz | |
spi: uniphier: fix zero-length transfer
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>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-uniphier.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c index c3c35c041ef1..b32c77df5d49 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); |