spi: fsl-lpspi: quit reading rx fifo under error condition

In case that error occurs during waiting for txfifo empty, it is
not necessary to read rx fifo. It's better to return directly.

Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index c4a4e2622a5340a51c7e70ca68496fa96bd950bc..52551f6d0c7ddf71aaf03ecc18c5caf2f804108b 100644 (file)
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -350,9 +350,12 @@ static int fsl_lpspi_transfer_one(struct spi_master *master,
        }
 
        ret = fsl_lpspi_txfifo_empty(fsl_lpspi);
+       if (ret)
+               return ret;
+
        fsl_lpspi_read_rx_fifo(fsl_lpspi);
 
-       return ret;
+       return 0;
 }
 
 static int fsl_lpspi_transfer_one_msg(struct spi_master *master,