accel/ivpu: Fix general protection fault in ivpu_bo_list()

Check if ctx is not NULL before accessing its fields.

Fixes: 37dee2a ("accel/ivpu: Improve buffer object debug logs")
Cc: [email protected] # v6.8
Reviewed-by: Karol Wachowski <[email protected]>
Reviewed-by: Jeffrey Hugo <[email protected]>
Signed-off-by: Jacek Lawrynowicz <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: jlawryno

drivers/accel/ivpu/ivpu_gem.c

@@ -409,7 +409,7 @@ static void ivpu_bo_print_info(struct ivpu_bo *bo, struct drm_printer *p)
 	mutex_lock(&bo->lock);
 
 	drm_printf(p, "%-9p %-3u 0x%-12llx %-10lu 0x%-8x %-4u",
-		   bo, bo->ctx->id, bo->vpu_addr, bo->base.base.size,
+		   bo, bo->ctx ? bo->ctx->id : 0, bo->vpu_addr, bo->base.base.size,
 		   bo->flags, kref_read(&bo->base.base.refcount));
 
 	if (bo->base.pages)