From 2763826966808800beeda5db406b3b704edc8137 Mon Sep 17 00:00:00 2001 From: Amelie Delaunay Date: Wed, 4 May 2022 17:53:22 +0200 Subject: [PATCH] dmaengine: stm32-mdma: use dev_dbg on non-busy channel spurious it If interrupt occurs while !chan->busy, it means channel has been disabled between the raise of the interruption and the read of status and ien, so, spurious interrupt can be silently discarded. Signed-off-by: Amelie Delaunay Link: https://lore.kernel.org/r/20220504155322.121431-4-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul --- drivers/dma/stm32-mdma.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c index a5cbfbb..caf0cce 100644 --- a/drivers/dma/stm32-mdma.c +++ b/drivers/dma/stm32-mdma.c @@ -1345,9 +1345,12 @@ static irqreturn_t stm32_mdma_irq_handler(int irq, void *devid) if (!(status & ien)) { spin_unlock(&chan->vchan.lock); - dev_warn(chan2dev(chan), - "spurious it (status=0x%04x, ien=0x%04x)\n", - status, ien); + if (chan->busy) + dev_warn(chan2dev(chan), + "spurious it (status=0x%04x, ien=0x%04x)\n", status, ien); + else + dev_dbg(chan2dev(chan), + "spurious it (status=0x%04x, ien=0x%04x)\n", status, ien); return IRQ_NONE; } -- 2.7.4