Before removing the driver, flush inter-function communication
work, and subsequent communication work is not processed.
This prevents communication threads from accessing released memory.
Fixes: ("crypto: hisilicon/qm - enable PF and VFs communication")
Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
if (!val)
return IRQ_NONE;
+ if (test_bit(QM_DRIVER_REMOVING, &qm->misc_ctl)) {
+ dev_warn(&qm->pdev->dev, "Driver is down, message cannot be processed!\n");
+ return IRQ_HANDLED;
+ }
+
schedule_work(&qm->cmd_process);
return IRQ_HANDLED;
test_bit(QM_RESETTING, &qm->misc_ctl))
msleep(WAIT_PERIOD);
+ if (test_bit(QM_SUPPORT_MB_COMMAND, &qm->caps))
+ flush_work(&qm->cmd_process);
+
udelay(REMOVE_WAIT_DELAY);
}
EXPORT_SYMBOL_GPL(hisi_qm_wait_task_finish);