> -----Original Message-----
> From: Fabio Estevam <festevam@xxxxxxxxx>
> Sent: 2019年6月24日 20:55
>
> Hi Robin,
>
> On Fri, Jun 21, 2019 at 5:21 AM <yibin.gong@xxxxxxx> wrote:
> >
> > From: Robin Gong <yibin.gong@xxxxxxx>
> >
> > It is possible for an irq triggered by channel0 to be received later
> > after clks are disabled once firmware loaded during sdma probe. If
> > that happens then clearing them by writing to SDMA_H_INTR won't work
> > and the kernel will hang processing infinite interrupts. Actually,
> > don't need interrupt triggered on channel0 since it's pollling
> > SDMA_H_STATSTOP to know channel0 done rather than interrupt in current
> > code, just clear BD_INTR to disable channel0 interrupt to avoid the
> > above case.
> > This issue was brought by commit 1d069bfa3c78 ("dmaengine: imx-sdma:
> > ack channel 0 IRQ in the interrupt handler") which didn't take care
> > the above case.
> >
> > Fixes: 1d069bfa3c78 ("dmaengine: imx-sdma: ack channel 0 IRQ in the
> > interrupt handler")
> > Cc: stable@xxxxxxxxxxxxxxx #5.0+
>
> This 5.0 notation does not look correct, as 1d069bfa3c78 was introduced in
> 4.10.
Yes, although Sven only met this issue after v4.19, this potential issue should be there.
But 1d069bfa3c78 seems merged from v4.7 instead?
