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spi: dw-spi: Single Register read to clear IRQs

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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 <tthayer@opensource.altera.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Thor Thayer 2015-03-06 17:46:32 -06:00 committed by Mark Brown
parent d744f82683
commit 2306509605
1 changed files with 1 additions and 3 deletions
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4
drivers/spi/spi-dw.c
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@ -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;
}