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authorGeorge Shore <george@georgeshore.com>2010-01-21 11:40:51 (GMT)
committerGrant Likely <grant.likely@secretlab.ca>2010-01-21 14:25:10 (GMT)
commitf4aec798ae5a837a1f062e295f9a5f1b00962589 (patch)
tree73c84ab0528fb7d9df5246c2cef6ea621d19c722 /drivers/spi
parent426c0093d8da4d7b6b0e62cda917b1bae26db4c2 (diff)
downloadlinux-f4aec798ae5a837a1f062e295f9a5f1b00962589.tar.xz
spi/dw_spi: remove conditional from 'poll_transfer'.
The 'poll_transfer' function employs a conditional to test whether the transmit buffer is valid; in doing so, on a receive operation no data is clocked out, thus no data is clocked in and ultimately errors appear. This removes the conditional as the transmit function will be set to a null writer when the transmit buffer is invalid, allowing the driver to clock 0x00 out to the device to receive data from the device. Signed-off-by: George Shore <george@georgeshore.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/dw_spi.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c
index d0a080a..3853df5 100644
--- a/drivers/spi/dw_spi.c
+++ b/drivers/spi/dw_spi.c
@@ -408,12 +408,9 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id)
/* Must be called inside pump_transfers() */
static void poll_transfer(struct dw_spi *dws)
{
- if (dws->tx) {
- while (dws->write(dws))
- dws->read(dws);
- }
+ while (dws->write(dws))
+ dws->read(dws);
- dws->read(dws);
transfer_complete(dws);
}