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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/s390/cio/device_ops.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/s390/cio/device_ops.c')
-rw-r--r--kernel/drivers/s390/cio/device_ops.c107
1 files changed, 0 insertions, 107 deletions
diff --git a/kernel/drivers/s390/cio/device_ops.c b/kernel/drivers/s390/cio/device_ops.c
index f3c417943..a69f702a2 100644
--- a/kernel/drivers/s390/cio/device_ops.c
+++ b/kernel/drivers/s390/cio/device_ops.c
@@ -412,52 +412,6 @@ int ccw_device_resume(struct ccw_device *cdev)
return cio_resume(sch);
}
-/*
- * Pass interrupt to device driver.
- */
-int
-ccw_device_call_handler(struct ccw_device *cdev)
-{
- unsigned int stctl;
- int ending_status;
-
- /*
- * we allow for the device action handler if .
- * - we received ending status
- * - the action handler requested to see all interrupts
- * - we received an intermediate status
- * - fast notification was requested (primary status)
- * - unsolicited interrupts
- */
- stctl = scsw_stctl(&cdev->private->irb.scsw);
- ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
- (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
- (stctl == SCSW_STCTL_STATUS_PEND);
- if (!ending_status &&
- !cdev->private->options.repall &&
- !(stctl & SCSW_STCTL_INTER_STATUS) &&
- !(cdev->private->options.fast &&
- (stctl & SCSW_STCTL_PRIM_STATUS)))
- return 0;
-
- /* Clear pending timers for device driver initiated I/O. */
- if (ending_status)
- ccw_device_set_timeout(cdev, 0);
- /*
- * Now we are ready to call the device driver interrupt handler.
- */
- if (cdev->handler)
- cdev->handler(cdev, cdev->private->intparm,
- &cdev->private->irb);
-
- /*
- * Clear the old and now useless interrupt response block.
- */
- memset(&cdev->private->irb, 0, sizeof(struct irb));
-
- return 1;
-}
-
/**
* ccw_device_get_ciw() - Search for CIW command in extended sense data.
* @cdev: ccw device to inspect
@@ -502,67 +456,6 @@ __u8 ccw_device_get_path_mask(struct ccw_device *cdev)
return sch->lpm;
}
-struct stlck_data {
- struct completion done;
- int rc;
-};
-
-void ccw_device_stlck_done(struct ccw_device *cdev, void *data, int rc)
-{
- struct stlck_data *sdata = data;
-
- sdata->rc = rc;
- complete(&sdata->done);
-}
-
-/*
- * Perform unconditional reserve + release.
- */
-int ccw_device_stlck(struct ccw_device *cdev)
-{
- struct subchannel *sch = to_subchannel(cdev->dev.parent);
- struct stlck_data data;
- u8 *buffer;
- int rc;
-
- /* Check if steal lock operation is valid for this device. */
- if (cdev->drv) {
- if (!cdev->private->options.force)
- return -EINVAL;
- }
- buffer = kzalloc(64, GFP_DMA | GFP_KERNEL);
- if (!buffer)
- return -ENOMEM;
- init_completion(&data.done);
- data.rc = -EIO;
- spin_lock_irq(sch->lock);
- rc = cio_enable_subchannel(sch, (u32) (addr_t) sch);
- if (rc)
- goto out_unlock;
- /* Perform operation. */
- cdev->private->state = DEV_STATE_STEAL_LOCK,
- ccw_device_stlck_start(cdev, &data, &buffer[0], &buffer[32]);
- spin_unlock_irq(sch->lock);
- /* Wait for operation to finish. */
- if (wait_for_completion_interruptible(&data.done)) {
- /* Got a signal. */
- spin_lock_irq(sch->lock);
- ccw_request_cancel(cdev);
- spin_unlock_irq(sch->lock);
- wait_for_completion(&data.done);
- }
- rc = data.rc;
- /* Check results. */
- spin_lock_irq(sch->lock);
- cio_disable_subchannel(sch);
- cdev->private->state = DEV_STATE_BOXED;
-out_unlock:
- spin_unlock_irq(sch->lock);
- kfree(buffer);
-
- return rc;
-}
-
/**
* chp_get_chp_desc - return newly allocated channel-path descriptor
* @cdev: device to obtain the descriptor for