From 6e30c549f6cab7a41d0934cea80822a2211132ae Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 2 Aug 2016 16:01:39 +0200 Subject: [PATCH] s390/qdio: remove checks for ccw device internal state Prior to starting IO qdio checks for the internal state of the ccw device. These checks happen without locking, so consistency between state evaluation and starting of the IO is not guaranteed. Since the internal state is checked during ccw_device_start it is safe to get rid of these additional checks. Signed-off-by: Sebastian Ott Reviewed-by: Cornelia Huck Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/qdio_main.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index da969789936d..fda3b2617ec9 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -1352,9 +1352,6 @@ int qdio_establish(struct qdio_initialize *init_data) if (!irq_ptr) return -ENODEV; - if (cdev->private->state != DEV_STATE_ONLINE) - return -EINVAL; - mutex_lock(&irq_ptr->setup_mutex); qdio_setup_irq(init_data); @@ -1425,9 +1422,6 @@ int qdio_activate(struct ccw_device *cdev) if (!irq_ptr) return -ENODEV; - if (cdev->private->state != DEV_STATE_ONLINE) - return -EINVAL; - mutex_lock(&irq_ptr->setup_mutex); if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { rc = -EBUSY; -- 2.20.1