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.
