From: Thor Thayer Date: Fri, 6 Mar 2015 23:46:32 +0000 (-0600) Subject: spi: dw-spi: Single Register read to clear IRQs X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=2306509605d3cb45b8480089af2d282600650e9e;p=deliverable%2Flinux.git spi: dw-spi: Single Register read to clear IRQs Instead of clearing the RxU, RxO, and TxO IRQs individually with 3 register reads, a single read of the ICR register will do the same thing. Signed-off-by: Thor Thayer Signed-off-by: Andy Shevchenko Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 2437bfcbf2f8..0f0106933b52 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -232,9 +232,7 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws) /* Error handling */ if (irq_status & (SPI_INT_TXOI | SPI_INT_RXOI | SPI_INT_RXUI)) { - dw_readw(dws, DW_SPI_TXOICR); - dw_readw(dws, DW_SPI_RXOICR); - dw_readw(dws, DW_SPI_RXUICR); + dw_readw(dws, DW_SPI_ICR); int_error_stop(dws, "interrupt_transfer: fifo overrun/underrun"); return IRQ_HANDLED; }