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s390/qdio: fix double return code evaluation 

qdio sometimes checks return codes twice. First with the ccw device's
lock held and then a 2nd time after the lock is released. Simplify
the code by releasing the lock earlier and unify the return code
evaluation.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2016-07-29 14:00:27 +02:00 committed by Martin Schwidefsky
parent a48ed86715
commit ddebf6612c
1 changed files with 3 additions and 8 deletions
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11
drivers/s390/cio/qdio_main.c
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@ -1375,13 +1375,10 @@ int qdio_establish(struct qdio_initialize *init_data)
ccw_device_set_options_mask(cdev, 0);
rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0);
spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc) {
DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%4x", rc);
}
spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc) {
mutex_unlock(&irq_ptr->setup_mutex);
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
return rc;
@ -1447,14 +1444,12 @@ int qdio_activate(struct ccw_device *cdev)
rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE,
0, DOIO_DENY_PREFETCH);
spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc) {
DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%4x", rc);
}
spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc)
goto out;
}
if (is_thinint_irq(irq_ptr))
tiqdio_add_input_queues(irq_ptr);