Messages in this thread Patch in this message | | | From | John Stultz <> | Subject | [PATCH 3/7 v5] k3dma: Fix "nobody cared" message seen on any error | Date | Mon, 29 Aug 2016 10:30:49 -0700 |
| |
From: Andy Green <andy.green@linaro.org>
As it was before, as soon as the DMAC IP felt there was an error he would return IRQ_NONE since no actual transfer had completed.
After spinning on that for 100K interrupts, Linux yanks the IRQ with a "nobody cared" error.
This patch lets it handle the interrupt and keep the IRQ alive.
Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Andy Green <andy.green@linaro.org> [jstultz: Forward ported to mainline] Signed-off-by: John Stultz <john.stultz@linaro.org> --- drivers/dma/k3dma.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c index 7dc7816..f46b9b8 100644 --- a/drivers/dma/k3dma.c +++ b/drivers/dma/k3dma.c @@ -221,11 +221,13 @@ static irqreturn_t k3_dma_int_handler(int irq, void *dev_id) writel_relaxed(err1, d->base + INT_ERR1_RAW); writel_relaxed(err2, d->base + INT_ERR2_RAW); - if (irq_chan) { + if (irq_chan) tasklet_schedule(&d->task); + + if (irq_chan || err1 || err2) return IRQ_HANDLED; - } else - return IRQ_NONE; + + return IRQ_NONE; } static int k3_dma_start_txd(struct k3_dma_chan *c) -- 1.9.1
| |