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 <[email protected]> --- drivers/spi/dw_spi.c | 7 ++----- 1 files changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c index 01292da..4f91554 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); } -- 1.6.6.264.gd0743 ------------------------------------------------------------------------------ Throughout its 18-year history, RSA Conference consistently attracts the world's best and brightest in the field, creating opportunities for Conference attendees to learn about information security's most important issues through interactions with peers, luminaries and emerging and established companies. http://p.sf.net/sfu/rsaconf-dev2dev _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
