Re: [PATCH 8/8] accel/ivpu: Fix deadlock in context_xa

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On 4/2/2024 4:49 AM, Jacek Lawrynowicz wrote:
ivpu_device->context_xa is locked both in kernel thread and IRQ context.
It requires XA_FLAGS_LOCK_IRQ flag to be passed during initialization
otherwise the lock could be acquired from a thread and interrupted by
an IRQ that locks it for the second time causing the deadlock.

This deadlock was reported by lockdep and observed in internal tests.

Fixes: 35b137630f08 ("accel/ivpu: Introduce a new DRM driver for Intel VPU")
Cc: <stable@xxxxxxxxxxxxxxx> # v6.3+
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@xxxxxxxxxxxxxxx>

Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>




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