linux-toradex.git/drivers/s390/block/dasd_fba.c, branch v3.3.4

[S390] fix mismatch in summation of I/O IRQ statistics

2011-10-30T14:16:15+00:00

Current IRQ statistics support does not show detail counts for I/O
interrupts which are processed internally only. The result is a
summation count which is way off such as this one:

           CPU0       CPU1       CPU2
I/O:       1331        710        442
[...]
QAI:         15         16         16   [I/O] QDIO Adapter Interrupt
QDI:          1          0          0   [I/O] QDIO Interrupt
DAS:        706        645        381   [I/O] DASD
C15:         26         10          0   [I/O] 3215
C70:          0          0          0   [I/O] 3270
TAP:          0          0          0   [I/O] Tape
VMR:          0          0          0   [I/O] Unit Record Devices
LCS:          0          0          0   [I/O] LCS
CLW:          0          0          0   [I/O] CLAW
CTC:          0          0          0   [I/O] CTC
APB:          0          0          0   [I/O] AP Bus

Fix this by moving I/O interrupt accounting into the common I/O layer.

Signed-off-by: Peter Oberparleiter 
Signed-off-by: Martin Schwidefsky

[S390] ccw_driver: remove duplicate members

2011-03-23T09:15:59+00:00

Remove the owner and name members of struct
ccw_driver and convert all drivers to store
this data in the embedded struct device_driver.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] dasd: Improve handling of stolen DASD reservation

2011-01-05T11:47:30+00:00

If a DASD device has been reserved by a Linux system, and later
this reservation is ‘stolen’ by a second system by means of an
unconditional reserve, then the first system receives a
notification about this fact. With this patch such an event can
be either ignored, as before, or it can be used to let the device
fail all I/O request, so that the device will not block anymore.

Signed-off-by: Stefan Weinhuber 
Signed-off-by: Martin Schwidefsky

[S390] dasd: do path verification for paths added at runtime

2011-01-05T11:47:30+00:00

When a new path is added at runtime, the CIO layer will call the drivers
path_event callback. The DASD device driver uses this callback to trigger
a path verification for the new path. The driver will use only those
paths for I/O, which have been successfully verified.

Signed-off-by: Stefan Weinhuber 
Signed-off-by: Martin Schwidefsky

[S390] dasd: tunable missing interrupt handler

2010-08-09T16:12:54+00:00

This feature provides a user interface to specify the timeout for
missing interrupts for standard I/O operations.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

[S390] dasd: automatic recognition of read-only devices

2010-03-08T11:26:27+00:00

In z/VM it is possible to attach a device as read-only. To prevent
unintentional write requests and subsequent I/O errors, we can detect
this configuration using the z/VM DIAG 210 interface and set the
respective linux block device to read-only as well.

Signed-off-by: Stefan Weinhuber 
Signed-off-by: Martin Schwidefsky

[S390] dasd: remove strings from s390dbf

2009-12-07T11:51:35+00:00

Remove strings from s390 debugfeature entries that could lead to a
crash when the data is read from dbf because the strings do not exist
any more.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

[S390] dasd: remove dead code

2009-12-07T11:51:34+00:00

the todclk.h header file is dead code. Remove it.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Martin Schwidefsky

[S390] dasd: fix message naming

2009-09-11T08:29:42+00:00

This patch fixes message naming so that generic dasd messages do not
contain the device discipline. For this purpose the dev_ makros are
replaced by pr_ makros for generic dasd messages.

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

[S390] dasd: optimize cpu usage in goodcase

2009-09-11T08:29:41+00:00

remove unnecessary dbf call, remove string operations for magic

Signed-off-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky