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dmaengine: stm32-mdma: use dev_dbg on non-busy channel spurious it

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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 <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20220504155322.121431-4-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Amelie Delaunay 2022-05-04 17:53:22 +02:00 committed by Vinod Koul
parent da3b8ddb46
commit 2763826966
1 changed files with 6 additions and 3 deletions
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9
drivers/dma/stm32-mdma.c
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@ -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;
}