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Commit 2ba69722 authored by Robin Gong's avatar Robin Gong Committed by 谢秀奇
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dmaengine: imx-sdma: remove BD_INTR for channel0


commit 3f93a4f2 upstream.

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 1d069bfa ("dmaengine: imx-sdma:
ack channel 0 IRQ in the interrupt handler") which didn't take care
the above case.

Fixes: 1d069bfa ("dmaengine: imx-sdma: ack channel 0 IRQ in the interrupt handler")
Cc: stable@vger.kernel.org #5.0+
Signed-off-by: default avatarRobin Gong <yibin.gong@nxp.com>
Reported-by: default avatarSven Van Asbroeck <thesven73@gmail.com>
Tested-by: default avatarSven Van Asbroeck <thesven73@gmail.com>
Reviewed-by: default avatarMichael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parent cf1c1c1d
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