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| author | Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2015-01-28 15:23:48 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-01-28 22:42:43 +0300 |
| commit | c30929415a3d7f186da888d322f93150af308287 (patch) | |
| tree | 8a7db031f7f75f840935446133b07f0be22a5331 | |
| parent | 24ba5e593f391507c614f5b62065194e6593a658 (diff) | |
| download | linux-c30929415a3d7f186da888d322f93150af308287.tar.xz | |
spi/xilinx: Make spi_tx and spi_rx simmetric
spi_rx handles the case where the buffer is null. Nevertheless spi_tx
did not handle it, and was handled by the caller function.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/spi/spi-xilinx.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index ac94e546a555..6ce1066be98b 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -116,6 +116,10 @@ static unsigned int xspi_read32_be(void __iomem *addr) static void xilinx_spi_tx(struct xilinx_spi *xspi) { + if (!xspi->tx_ptr) { + xspi->write_fn(0, xspi->regs + XSPI_TXD_OFFSET); + return; + } xspi->write_fn(*(u32 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET); xspi->tx_ptr += xspi->bits_per_word / 8; } @@ -230,10 +234,7 @@ static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi, int n_words) xspi->remaining_bytes -= n_words * xspi->bits_per_word / 8; while (n_words--) - if (xspi->tx_ptr) - xilinx_spi_tx(xspi); - else - xspi->write_fn(0, xspi->regs + XSPI_TXD_OFFSET); + xilinx_spi_tx(xspi); return; } |