[PATCH] au1550_spi: fix setupxfer not to override cfg with zeros

[Jan Nikitenko <jan.nikitenko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

fix setupxfer() not to override generic configuration of speed_hz
and bits_per_word with zeros

Signed-off-by: Jan Nikitenko <jan.nikitenko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/spi/au1550_spi.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/au1550_spi.c b/drivers/spi/au1550_spi.c
index 76cbc1a..cfd5ff9 100644
--- a/drivers/spi/au1550_spi.c
+++ b/drivers/spi/au1550_spi.c
@@ -237,8 +237,14 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
 	unsigned bpw, hz;
 	u32 cfg, stat;
 
-	bpw = t ? t->bits_per_word : spi->bits_per_word;
-	hz = t ? t->speed_hz : spi->max_speed_hz;
+	bpw = spi->bits_per_word;
+	hz = spi->max_speed_hz;
+	if (t) {
+		if (t->bits_per_word)
+			bpw = t->bits_per_word;
+		if (t->speed_hz)
+			hz = t->speed_hz;
+	}
 
 	if (bpw < 4 || bpw > 24) {
 		dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n",


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