5 Apr
2024
5 Apr
'24
3:29 p.m.
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@vger.kernel.org # v6.3+ Signed-off-by: Jacek Lawrynowicz jacek.lawrynowicz@linux.intel.com
Reviewed-by: Jeffrey Hugo quic_jhugo@quicinc.com