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Unverified Commit 63f5ffc4 authored by Lanqing Liu's avatar Lanqing Liu Committed by Mark Brown
Browse files

spi: sprd: Fix the error data length in SPI read-only mode 



In SPI read-only mode, we will always return the writing length,
which is always the power of "bits_per_word", but the length unit
using by users is byte.

Thus this patch fixes the returning length by getting from
read_bufs() function to get the correct length.

Signed-off-by: default avatarLanqing Liu <lanqing.liu@spreadtrum.com>
Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent baf8b9f8

drivers/spi/spi-sprd.c

+6 −4
Original line number Diff line number Diff line
@@ -380,7 +380,7 @@ static int sprd_spi_txrx_bufs(struct spi_device *sdev, struct spi_transfer *t) 
{

	struct sprd_spi *ss = spi_controller_get_devdata(sdev->controller);

	u32 trans_len = ss->trans_len, len;

	int ret, write_size = 0;

	int ret, write_size = 0, read_size = 0;



	while (trans_len) {

		len = trans_len > SPRD_SPI_FIFO_SIZE ? SPRD_SPI_FIFO_SIZE :
@@ -416,13 +416,15 @@ static int sprd_spi_txrx_bufs(struct spi_device *sdev, struct spi_transfer *t) 
			goto complete;



		if (ss->trans_mode & SPRD_SPI_RX_MODE)

			ss->read_bufs(ss, len);

			read_size += ss->read_bufs(ss, len);



		trans_len -= len;

	}



	if (ss->trans_mode & SPRD_SPI_TX_MODE)

		ret = write_size;



	else

		ret = read_size;

complete:

	sprd_spi_enter_idle(ss);