Commit 27638269 authored by Amelie Delaunay's avatar Amelie Delaunay Committed by Vinod Koul
Browse files

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: default avatarAmelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20220504155322.121431-4-amelie.delaunay@foss.st.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent da3b8ddb

drivers/dma/stm32-mdma.c

+6 −3
Original line number Diff line number Diff line
@@ -1345,9 +1345,12 @@ static irqreturn_t stm32_mdma_irq_handler(int irq, void *devid) 


	if (!(status & ien)) {

		spin_unlock(&chan->vchan.lock);

		if (chan->busy)

			dev_warn(chan2dev(chan),

			 "spurious it (status=0x%04x, ien=0x%04x)\n",

			 status, ien);

				 "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;

	}