diff options
| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-07-29 14:00:27 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-08-08 15:41:34 +0200 |
| commit | ddebf6612c5dcc479725867b9fd9a4d98f41350f (patch) | |
| tree | 9b3e4bbf7df3c0c8b6260a1a3b08582ce61bf3eb /drivers/s390 | |
| parent | s390/qdio: get rid of spin_lock_irqsave usage (diff) | |
| download | linux-dev-ddebf6612c5dcc479725867b9fd9a4d98f41350f.tar.xz linux-dev-ddebf6612c5dcc479725867b9fd9a4d98f41350f.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index b200f27489a7..da969789936d 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -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); |