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Commit 95e5fda3 authored by Eric Pilmore's avatar Eric Pilmore Committed by Vinod Koul
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ptdma: pt_core_execute_cmd() should use spinlock



The interrupt handler (pt_core_irq_handler()) of the ptdma
driver can be called from interrupt context. The code flow
in this function can lead down to pt_core_execute_cmd() which
will attempt to grab a mutex, which is not appropriate in
interrupt context and ultimately leads to a kernel panic.
The fix here changes this mutex to a spinlock, which has
been verified to resolve the issue.

Fixes: fa5d823b ("dmaengine: ptdma: Initial driver for the AMD PTDMA")
Signed-off-by: default avatarEric Pilmore <epilmore@gigaio.com>
Link: https://lore.kernel.org/r/20230119033907.35071-1-epilmore@gigaio.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent a7a7ee6f
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