accel/ivpu: Fix deadlock in context_xa

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: 35b1376 ("accel/ivpu: Introduce a new DRM driver for Intel VPU")
Cc: <[email protected]> # v6.3+
Signed-off-by: Jacek Lawrynowicz <[email protected]>
Reviewed-by: Jeffrey Hugo <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: jlawryno

drivers/accel/ivpu/ivpu_drv.c

@@ -517,7 +517,7 @@ static int ivpu_dev_init(struct ivpu_device *vdev)
 	vdev->context_xa_limit.min = IVPU_USER_CONTEXT_MIN_SSID;
 	vdev->context_xa_limit.max = IVPU_USER_CONTEXT_MAX_SSID;
 	atomic64_set(&vdev->unique_id_counter, 0);
-	xa_init_flags(&vdev->context_xa, XA_FLAGS_ALLOC);
+	xa_init_flags(&vdev->context_xa, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
 	xa_init_flags(&vdev->submitted_jobs_xa, XA_FLAGS_ALLOC1);
 	xa_init_flags(&vdev->db_xa, XA_FLAGS_ALLOC1);
 	lockdep_set_class(&vdev->submitted_jobs_xa.xa_lock, &submitted_jobs_xa_lock_class_key);