From 12fb61a973935c63f2580b3b053017cc14b51f42 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Fri, 23 Aug 2019 00:15:10 +0300 Subject: [PATCH] spi: spi-fsl-dspi: Reduce indentation level in dspi_interrupt If the entire function depends on the SPI status register having the interrupt bits asserted, then just check it and exit early if those bits aren't set (such as in the case of the shared IRQ being triggered for the other peripheral). Cosmetic patch. Signed-off-by: Vladimir Oltean Link: https://lore.kernel.org/r/20190822211514.19288-2-olteanv@gmail.com Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-dspi.c | 77 +++++++++++++++++++------------------- 1 file changed, 39 insertions(+), 38 deletions(-) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 790cb02fc181..c90db7db4121 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -658,47 +658,48 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id) regmap_read(dspi->regmap, SPI_SR, &spi_sr); regmap_write(dspi->regmap, SPI_SR, spi_sr); + if (!(spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF))) + return IRQ_HANDLED; - if (spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF)) { - /* Get transfer counter (in number of SPI transfers). It was - * reset to 0 when transfer(s) were started. - */ - regmap_read(dspi->regmap, SPI_TCR, &spi_tcr); - spi_tcnt = SPI_TCR_GET_TCNT(spi_tcr); - /* Update total number of bytes that were transferred */ - msg->actual_length += spi_tcnt * dspi->bytes_per_word; + /* Get transfer counter (in number of SPI transfers). It was + * reset to 0 when transfer(s) were started. + */ + regmap_read(dspi->regmap, SPI_TCR, &spi_tcr); + spi_tcnt = SPI_TCR_GET_TCNT(spi_tcr); + /* Update total number of bytes that were transferred */ + msg->actual_length += spi_tcnt * dspi->bytes_per_word; - trans_mode = dspi->devtype_data->trans_mode; - switch (trans_mode) { - case DSPI_EOQ_MODE: - dspi_eoq_read(dspi); - break; - case DSPI_TCFQ_MODE: - dspi_tcfq_read(dspi); - break; - default: - dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n", - trans_mode); - return IRQ_HANDLED; - } + trans_mode = dspi->devtype_data->trans_mode; + switch (trans_mode) { + case DSPI_EOQ_MODE: + dspi_eoq_read(dspi); + break; + case 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; - wake_up_interruptible(&dspi->waitq); - } else { - switch (trans_mode) { - case DSPI_EOQ_MODE: - dspi_eoq_write(dspi); - break; - case DSPI_TCFQ_MODE: - dspi_tcfq_write(dspi); - break; - default: - dev_err(&dspi->pdev->dev, - "unsupported trans_mode %u\n", - trans_mode); - } - } + if (!dspi->len) { + dspi->waitflags = 1; + wake_up_interruptible(&dspi->waitq); + return IRQ_HANDLED; + } + + switch (trans_mode) { + case DSPI_EOQ_MODE: + dspi_eoq_write(dspi); + break; + case DSPI_TCFQ_MODE: + dspi_tcfq_write(dspi); + break; + default: + dev_err(&dspi->pdev->dev, + "unsupported trans_mode %u\n", + trans_mode); } return IRQ_HANDLED;