This patch disables the use of DMA_INTERRUPT capability with Async_tx The fsldma produces a null transfer with DMA_INTERRUPT capability when used with Async_tx. When RAID devices queue a transaction via Async_tx, this results in a hang. Signed-off-by: Vishnu Suresh <Vishnu@xxxxxxxxxxxxx> --- drivers/dma/fsldma.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 296f9e7..66d9b39 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -1200,7 +1200,13 @@ static int __devinit of_fsl_dma_probe(struct of_device *dev, - fdev->reg.start + 1); dma_cap_set(DMA_MEMCPY, fdev->common.cap_mask); +#ifndef CONFIG_ASYNC_CORE + /* + * The DMA_INTERRUPT async_tx is a NULL transfer, which will + * triger a PE interrupt. + */ dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask); +#endif dma_cap_set(DMA_SLAVE, fdev->common.cap_mask); fdev->common.device_alloc_chan_resources = fsl_dma_alloc_chan_resources; fdev->common.device_free_chan_resources = fsl_dma_free_chan_resources; -- 1.6.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
