This is a note to let you know that I've just added the patch titled
spi: sirf: enable RX_IO_DMA_INT interrupt
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-sirf-enable-rx_io_dma_int-interrupt.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f2a08b404691ef3e7be6ce81c185335cfc68b6db Mon Sep 17 00:00:00 2001
From: Qipan Li <Qipan.Li@xxxxxxx>
Date: Tue, 2 Sep 2014 17:01:03 +0800
Subject: spi: sirf: enable RX_IO_DMA_INT interrupt
From: Qipan Li <Qipan.Li@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Barry Song <Baohua.Song@xxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi-sirf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/spi/spi-sirf.c
+++ b/drivers/spi/spi-sirf.c
@@ -438,7 +438,8 @@ static void spi_sirfsoc_pio_transfer(str
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);
Patches currently in stable-queue which might be from Qipan.Li@xxxxxxx are
queue-3.16/spi-sirf-enable-rx_io_dma_int-interrupt.patch
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