Commit f2a08b40 authored Sep 02, 2014 by Qipan Li Committed by Mark Brown Sep 04, 2014

spi: sirf: enable RX_IO_DMA_INT interrupt



in spi interrupt handler, we need check RX_IO_DMA status to ensure
rx fifo have received the specify count data.

if not set, the while statement in spi isr function will keep loop,
at last, make the kernel hang.

[The code is actually there in the interrupt handler but apparently it
needs the interrupt unmasking so the handler sees the status -- broonie]

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

parent 7d1311b9

drivers/spi/spi-sirf.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -438,7 +438,8 @@ static void spi_sirfsoc_pio_transfer(struct spi_device *spi,
		sspi->tx_word(sspi);
		writel(SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN \|
		SIRFSOC_SPI_TX_UFLOW_INT_EN \|
		SIRFSOC_SPI_RX_OFLOW_INT_EN,
		SIRFSOC_SPI_RX_OFLOW_INT_EN \|
		SIRFSOC_SPI_RX_IO_DMA_INT_EN,
		sspi->base + SIRFSOC_SPI_INT_EN);
		writel(SIRFSOC_SPI_RX_EN \| SIRFSOC_SPI_TX_EN,
		sspi->base + SIRFSOC_SPI_TX_RX_EN);

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