spi: imx: replace schedule() with cond_resched()

It's more rational that just do the schedule when necessary
other than do it every time. Thus, it's better to replace
schedule() with cond_resched() in fsl_lpspi_txfifo_empty(),
which contributes to saving cpu time.

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 18a269d2e2f8b4bdd307b6be49c5c6e2fb39a7c4..539c971b9f05e5702e1e39a9d02e4b3973a65bec 100644 (file)
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -176,7 +176,7 @@ static int fsl_lpspi_txfifo_empty(struct fsl_lpspi_data *fsl_lpspi)
                        dev_dbg(fsl_lpspi->dev, "txfifo empty timeout\n");
                        return -ETIMEDOUT;
                }
-               schedule();
+               cond_resched();
 
        } while (txcnt);