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| author | Qipan Li <Qipan.Li@csr.com> | 2014-09-02 17:01:03 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-05 13:41:09 -0700 |
| commit | 30b9f42a25842ddcb389ee917a2f95348cfa550a (patch) | |
| tree | f368b269852d3f277fb812e182f41f80147ef184 /drivers/spi | |
| parent | 2ac3e493a3e353d0fc1b69ead7952d436638453f (diff) | |
| download | linux-stable-30b9f42a25842ddcb389ee917a2f95348cfa550a.tar.gz linux-stable-30b9f42a25842ddcb389ee917a2f95348cfa550a.tar.bz2 linux-stable-30b9f42a25842ddcb389ee917a2f95348cfa550a.zip | |
spi: sirf: enable RX_IO_DMA_INT interrupt
commit f2a08b404691ef3e7be6ce81c185335cfc68b6db upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-sirf.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 95ac276eaafe..1a5161336730 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -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); |