On Wed, Nov 16, 2016 at 04:17:27PM -0700, Scott Bauer wrote:
> +int opal_unlock_from_suspend(struct opal_suspend_unlk *data)
> +{
> + const char *diskname = data->name;
> + struct opal_dev *iter, *dev = NULL;
> + struct opal_completion *completion;
> + void *func_data[3] = { NULL };
> +
> + spin_lock(&list_spinlock);
> + list_for_each_entry(iter, &opal_list, node) {
> + if (strncmp(iter->disk_name, diskname, DISK_NAME_LEN)) {
> + pr_err("iterdisk was %s and diskname is %s\n",
> + iter->disk_name, diskname);
> + continue;
> + }
> + if (atomic_add_unless(&iter->in_use, 1, 1)) {
> + dev = iter;
> + dev->func_data = func_data;
> + dev->resume_from_suspend = true;
> + dev->resume_data = data;
> + dev->final_cb = unlock_suspend_final;
> + dev->final_cb_data = dev;
> + dev->error_cb = end_opal_session_error;
> + dev->error_cb_data = dev;
> + dev->state = 0;
> + if (dev->lkul.authority.SUM)
> + dev->funcs = ulk_funcs_SUM;
> + else
> + dev->funcs = _unlock_funcs;
> + dev->TSN = 0;
> + dev->HSN = 0;
> + dev->func_data[2] = &dev->lkul;
> + dev->func_data[1] = &dev->lkul.authority;
> + completion = dev->completion;
> + next(0, dev);
> + wait_for_cmd_completion(completion);
Waiting while holding a spinlock will get a scheduling error.
> + }
> + }
> + spin_unlock(&list_spinlock);
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