dspi->devtype_data is under the total control of the driver. Therefore, a bad value is a driver bug and checking it at runtime (and during an ISR, at that!) is pointless.
The second "else if" check is only for clarity (instead of a broader "else") in case other transfer modes are added in the future. But the printing is dead code and can be removed. Signed-off-by: Vladimir Oltean <[email protected]> --- drivers/spi/spi-fsl-dspi.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 6ef2279a3699..6d2c7984ab0e 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -670,18 +670,10 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id) msg->actual_length += spi_tcnt * dspi->bytes_per_word; trans_mode = dspi->devtype_data->trans_mode; - switch (trans_mode) { - case DSPI_EOQ_MODE: + if (trans_mode == DSPI_EOQ_MODE) dspi_eoq_read(dspi); - break; - case DSPI_TCFQ_MODE: + else if (trans_mode == DSPI_TCFQ_MODE) dspi_tcfq_read(dspi); - break; - default: - dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n", - trans_mode); - return IRQ_HANDLED; - } if (!dspi->len) { dspi->waitflags = 1; @@ -689,18 +681,10 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } - switch (trans_mode) { - case DSPI_EOQ_MODE: + if (trans_mode == DSPI_EOQ_MODE) dspi_eoq_write(dspi); - break; - case DSPI_TCFQ_MODE: + else if (trans_mode == DSPI_TCFQ_MODE) dspi_tcfq_write(dspi); - break; - default: - dev_err(&dspi->pdev->dev, - "unsupported trans_mode %u\n", - trans_mode); - } return IRQ_HANDLED; } -- 2.17.1
