Commit f4aec798 authored Jan 21, 2010 by George Shore Committed by Grant Likely Jan 21, 2010

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>

parent 426c0093

drivers/spi/dw_spi.c

+2 −5

Original line number	Diff line number	Diff line
		@@ -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);
		}

		dws->read(dws);
		transfer_complete(dws);
		}