PCI_CHECK_AND_UNMASK(9) Hardware Interfaces PCI_CHECK_AND_UNMASK(9)NAME
pci_check_and_unmask_intx - unmask INTx of no interrupt is pending
SYNOPSIS
bool pci_check_and_unmask_intx(struct pci_dev * dev);
ARGUMENTS
dev
the PCI device to operate on
DESCRIPTION
Check if the device dev has its INTx line asserted, unmask it if not and return true. False is returned and the mask remains active if
there was still an interrupt pending.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 PCI_CHECK_AND_UNMASK(9)
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CCW_DEVICE_START(9) The ccw bus CCW_DEVICE_START(9)NAME
ccw_device_start - start a s390 channel program
SYNOPSIS
int ccw_device_start(struct ccw_device * cdev, struct ccw1 * cpa, unsigned long intparm, __u8 lpm, unsigned long flags);
ARGUMENTS
cdev
target ccw device
cpa
logical start address of channel program
intparm
user specific interruption parameter; will be presented back to cdev's interrupt handler. Allows a device driver to associate the
interrupt with a particular I/O request.
lpm
defines the channel path to be used for a specific I/O request. A value of 0 will make cio use the opm.
flags
additional flags; defines the action to be performed for I/O processing.
DESCRIPTION
Start a S/390 channel program. When the interrupt arrives, the IRQ handler is called, either immediately, delayed (dev-end missing, or
sense required) or never (no IRQ handler registered).
RETURNS
0, if the operation was successful; -EBUSY, if the device is busy, or status pending; -EACCES, if no path specified in lpm is operational;
-ENODEV, if the device is not operational.
CONTEXT
Interrupts disabled, ccw device lock held
AUTHOR
Cornelia Huck <cornelia.huck@de.ibm.com>
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 CCW_DEVICE_START(9)
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