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| author | Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> | 2017-04-12 11:08:15 +0200 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2017-04-12 12:33:36 +0200 |
| commit | c9c31b07bab5fee3ef0bf163afc11b1100eb10d4 (patch) | |
| tree | 1cd0d43091d53dd4cab77189802eda02d9612a0e /drivers/s390/cio | |
| parent | 1877888d0ad21858693d8a5594734b125a068638 (diff) | |
| download | linux-c9c31b07bab5fee3ef0bf163afc11b1100eb10d4.tar.bz2 | |
vfio: ccw: remove unnecessary NULL checks of a pointer
Remove several unnecessary checks for the @private pointer, since it
can never be NULL in these places.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170412090816.79108-2-bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_fsm.c | 6 | ||||
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_ops.c | 17 |
2 files changed, 1 insertions, 22 deletions
diff --git a/drivers/s390/cio/vfio_ccw_fsm.c b/drivers/s390/cio/vfio_ccw_fsm.c index 55b6cc55758e..80a0559cd7ce 100644 --- a/drivers/s390/cio/vfio_ccw_fsm.c +++ b/drivers/s390/cio/vfio_ccw_fsm.c @@ -161,12 +161,8 @@ err_out: static void fsm_irq(struct vfio_ccw_private *private, enum vfio_ccw_event event) { - struct irb *irb; + struct irb *irb = this_cpu_ptr(&cio_irb); - if (!private) - return; - - irb = this_cpu_ptr(&cio_irb); memcpy(&private->irb, irb, sizeof(*irb)); queue_work(vfio_ccw_work_q, &private->io_work); diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index b2e615404034..55d0c87e73c3 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -19,9 +19,6 @@ static int vfio_ccw_mdev_reset(struct mdev_device *mdev) int ret; private = dev_get_drvdata(mdev_parent_dev(mdev)); - if (!private) - return -ENODEV; - sch = private->sch; /* * TODO: @@ -49,9 +46,6 @@ static int vfio_ccw_mdev_notifier(struct notifier_block *nb, struct vfio_ccw_private *private = container_of(nb, struct vfio_ccw_private, nb); - if (!private) - return NOTIFY_STOP; - /* * Vendor drivers MUST unpin pages in response to an * invalidation. @@ -134,9 +128,6 @@ static int vfio_ccw_mdev_remove(struct mdev_device *mdev) dev_get_drvdata(mdev_parent_dev(mdev)); int ret; - if (!private) - goto out; - if ((private->state == VFIO_CCW_STATE_NOT_OPER) || (private->state == VFIO_CCW_STATE_STANDBY)) goto out; @@ -187,9 +178,6 @@ static ssize_t vfio_ccw_mdev_read(struct mdev_device *mdev, return -EINVAL; private = dev_get_drvdata(mdev_parent_dev(mdev)); - if (!private) - return -ENODEV; - region = &private->io_region; if (copy_to_user(buf, (void *)region + *ppos, count)) return -EFAULT; @@ -209,8 +197,6 @@ static ssize_t vfio_ccw_mdev_write(struct mdev_device *mdev, return -EINVAL; private = dev_get_drvdata(mdev_parent_dev(mdev)); - if (!private) - return -ENODEV; if (private->state != VFIO_CCW_STATE_IDLE) return -EACCES; @@ -274,9 +260,6 @@ static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev, return -EINVAL; private = dev_get_drvdata(mdev_parent_dev(mdev)); - if (!private) - return -ENODEV; - ctx = &private->io_trigger; switch (flags & VFIO_IRQ_SET_DATA_TYPE_MASK) { |