diff options
Diffstat (limited to 'drivers/s390/cio/device_ops.c')
| -rw-r--r-- | drivers/s390/cio/device_ops.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c index d722458c5928..65841af15748 100644 --- a/drivers/s390/cio/device_ops.c +++ b/drivers/s390/cio/device_ops.c @@ -124,9 +124,7 @@ EXPORT_SYMBOL(ccw_device_is_multipath); /** * ccw_device_clear() - terminate I/O request processing * @cdev: target ccw device - * @intparm: interruption parameter; value is only used if no I/O is - * outstanding, otherwise the intparm associated with the I/O request - * is returned + * @intparm: interruption parameter to be returned upon conclusion of csch * * ccw_device_clear() calls csch on @cdev's subchannel. * Returns: @@ -179,6 +177,9 @@ int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm) * completed during the time specified by @expires. If a timeout occurs, the * channel program is terminated via xsch, hsch or csch, and the device's * interrupt handler will be called with an irb containing ERR_PTR(-%ETIMEDOUT). + * The interruption handler will echo back the @intparm specified here, unless + * another interruption parameter is specified by a subsequent invocation of + * ccw_device_halt() or ccw_device_clear(). * Returns: * %0, if the operation was successful; * -%EBUSY, if the device is busy, or status pending; @@ -256,6 +257,9 @@ int ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa, * 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). + * The interruption handler will echo back the @intparm specified here, unless + * another interruption parameter is specified by a subsequent invocation of + * ccw_device_halt() or ccw_device_clear(). * Returns: * %0, if the operation was successful; * -%EBUSY, if the device is busy, or status pending; @@ -287,6 +291,9 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, * 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). + * The interruption handler will echo back the @intparm specified here, unless + * another interruption parameter is specified by a subsequent invocation of + * ccw_device_halt() or ccw_device_clear(). * Returns: * %0, if the operation was successful; * -%EBUSY, if the device is busy, or status pending; @@ -322,6 +329,9 @@ int ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa, * completed during the time specified by @expires. If a timeout occurs, the * channel program is terminated via xsch, hsch or csch, and the device's * interrupt handler will be called with an irb containing ERR_PTR(-%ETIMEDOUT). + * The interruption handler will echo back the @intparm specified here, unless + * another interruption parameter is specified by a subsequent invocation of + * ccw_device_halt() or ccw_device_clear(). * Returns: * %0, if the operation was successful; * -%EBUSY, if the device is busy, or status pending; @@ -343,11 +353,12 @@ int ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa, /** * ccw_device_halt() - halt I/O request processing * @cdev: target ccw device - * @intparm: interruption parameter; value is only used if no I/O is - * outstanding, otherwise the intparm associated with the I/O request - * is returned + * @intparm: interruption parameter to be returned upon conclusion of hsch * * ccw_device_halt() calls hsch on @cdev's subchannel. + * The interruption handler will echo back the @intparm specified here, unless + * another interruption parameter is specified by a subsequent invocation of + * ccw_device_clear(). * Returns: * %0 on success, * -%ENODEV on device not operational, |