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authorNicolas Kaiser <nikai@nikai.net>2006-12-04 09:40:23 -0500
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-12-04 09:40:23 -0500
commit2254f5a7779452395e37ea2f7d6e1a550d34e678 (patch)
tree21ae898f9ef043dc240f2a4d1ba52da9a5ae51ad /Documentation/s390/cds.txt
parent6b4044bdd158aa9ad07b3f68d1c7598036d3ee58 (diff)
[S390] Some documentation typos.
Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'Documentation/s390/cds.txt')
-rw-r--r--Documentation/s390/cds.txt12
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/s390/cds.txt b/Documentation/s390/cds.txt
index 32a96cc39215..05a2b4f7e38f 100644
--- a/Documentation/s390/cds.txt
+++ b/Documentation/s390/cds.txt
@@ -98,7 +98,7 @@ The following chapters describe the I/O related interface routines the
98Linux/390 common device support (CDS) provides to allow for device specific 98Linux/390 common device support (CDS) provides to allow for device specific
99driver implementations on the IBM ESA/390 hardware platform. Those interfaces 99driver implementations on the IBM ESA/390 hardware platform. Those interfaces
100intend to provide the functionality required by every device driver 100intend to provide the functionality required by every device driver
101implementaion to allow to drive a specific hardware device on the ESA/390 101implementation to allow to drive a specific hardware device on the ESA/390
102platform. Some of the interface routines are specific to Linux/390 and some 102platform. Some of the interface routines are specific to Linux/390 and some
103of them can be found on other Linux platforms implementations too. 103of them can be found on other Linux platforms implementations too.
104Miscellaneous function prototypes, data declarations, and macro definitions 104Miscellaneous function prototypes, data declarations, and macro definitions
@@ -114,7 +114,7 @@ the ESA/390 architecture has implemented a so called channel subsystem, that
114provides a unified view of the devices physically attached to the systems. 114provides a unified view of the devices physically attached to the systems.
115Though the ESA/390 hardware platform knows about a huge variety of different 115Though the ESA/390 hardware platform knows about a huge variety of different
116peripheral attachments like disk devices (aka. DASDs), tapes, communication 116peripheral attachments like disk devices (aka. DASDs), tapes, communication
117controllers, etc. they can all by accessed by a well defined access method and 117controllers, etc. they can all be accessed by a well defined access method and
118they are presenting I/O completion a unified way : I/O interruptions. Every 118they are presenting I/O completion a unified way : I/O interruptions. Every
119single device is uniquely identified to the system by a so called subchannel, 119single device is uniquely identified to the system by a so called subchannel,
120where the ESA/390 architecture allows for 64k devices be attached. 120where the ESA/390 architecture allows for 64k devices be attached.
@@ -338,7 +338,7 @@ DOIO_REPORT_ALL - report all interrupt conditions
338The ccw_device_start() function returns : 338The ccw_device_start() function returns :
339 339
340 0 - successful completion or request successfully initiated 340 0 - successful completion or request successfully initiated
341-EBUSY - The device is currently processing a previous I/O request, or ther is 341-EBUSY - The device is currently processing a previous I/O request, or there is
342 a status pending at the device. 342 a status pending at the device.
343-ENODEV - cdev is invalid, the device is not operational or the ccw_device is 343-ENODEV - cdev is invalid, the device is not operational or the ccw_device is
344 not online. 344 not online.
@@ -361,7 +361,7 @@ first:
361-EIO: the common I/O layer terminated the request due to an error state 361-EIO: the common I/O layer terminated the request due to an error state
362 362
363If the concurrent sense flag in the extended status word in the irb is set, the 363If the concurrent sense flag in the extended status word in the irb is set, the
364field irb->scsw.count describes the numer of device specific sense bytes 364field irb->scsw.count describes the number of device specific sense bytes
365available in the extended control word irb->scsw.ecw[0]. No device sensing by 365available in the extended control word irb->scsw.ecw[0]. No device sensing by
366the device driver itself is required. 366the device driver itself is required.
367 367
@@ -410,7 +410,7 @@ ccw_device_start() must be called disabled and with the ccw device lock held.
410 410
411The device driver is allowed to issue the next ccw_device_start() call from 411The device driver is allowed to issue the next ccw_device_start() call from
412within its interrupt handler already. It is not required to schedule a 412within its interrupt handler already. It is not required to schedule a
413bottom-half, unless an non deterministically long running error recovery procedure 413bottom-half, unless a non deterministically long running error recovery procedure
414or similar needs to be scheduled. During I/O processing the Linux/390 generic 414or similar needs to be scheduled. During I/O processing the Linux/390 generic
415I/O device driver support has already obtained the IRQ lock, i.e. the handler 415I/O device driver support has already obtained the IRQ lock, i.e. the handler
416must not try to obtain it again when calling ccw_device_start() or we end in a 416must not try to obtain it again when calling ccw_device_start() or we end in a
@@ -431,7 +431,7 @@ information prior to device-end the device driver urgently relies on. In this
431case all I/O interruptions are presented to the device driver until final 431case all I/O interruptions are presented to the device driver until final
432status is recognized. 432status is recognized.
433 433
434If a device is able to recover from asynchronosly presented I/O errors, it can 434If a device is able to recover from asynchronously presented I/O errors, it can
435perform overlapping I/O using the DOIO_EARLY_NOTIFICATION flag. While some 435perform overlapping I/O using the DOIO_EARLY_NOTIFICATION flag. While some
436devices always report channel-end and device-end together, with a single 436devices always report channel-end and device-end together, with a single
437interrupt, others present primary status (channel-end) when the channel is 437interrupt, others present primary status (channel-end) when the channel is