kernel/drivers/s390/block/dasd_alias.c, branch linux-4.3.y

s390: remove unneeded semicolon

2015-08-07T07:57:00Z

Remove unneeded semicolon. The semantic patch that detects this change is available at scripts/coccinelle/misc/semicolon.cocci. Signed-off-by: Peter Senna Tschudin Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/dasd: fix kernel panic when alias is set offline

2015-07-13T09:02:14Z

The dasd device driver selects which (alias or base) device is used for a given requests when the request is build. If the chosen alias device is set offline before the request gets queued to the device queue the starting function may use device structures that are already freed. This might lead to a hanging offline process or a kernel panic. Add a check to the starting function that returns the request to the upper layer if the device is already in offline processing. In addition to that prevent that an alias device that's already in offline processing gets chosen as start device. Reviewed-by: Sebastian Ott Reviewed-by: Peter Oberparleiter Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

s390/time: rename tod clock access functions

2013-02-14T14:55:10Z

Fix name clash with some common code device drivers and add "tod" to all tod clock access function names. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/dasd: fix read unit address configuration loop

2012-09-17T07:58:21Z

Read unit address is done for all devices during online processing to read out LCU features. This is also done after disconnect/connect a LCU. Some older storage hardware does not provide the capability to read unit address configuration. This leads to a loop trying to read unit address configuration every 30 seconds. The device is still operational but logs are flooded with error messages. Fix the loop by recognizing a command reject saying that the suborder for ruac is not supported. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

s390/comments: unify copyright messages and remove file names

2012-07-20T09:15:04Z

Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens

[S390] dasd: revert LCU optimization

2012-01-18T17:03:42Z

Remove the optimization that validate server is only called once per LCU. If a device is set online we only know that we already know the LCU. But if the pathgroup was lost in between we have to do a validate server again to activate some features. Since we have no indication when a pathgroup gets lost we have to do a validate server every time a device is set online. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

[S390] dasd: fix fixpoint divide exception in define_extent

2011-12-27T10:27:14Z

If an IO request is build on an alias device without prefix enabled we try to calculate with zero data from the alias device. This triggers a BUG statement with fixpoint divide exception. This case is very unlikely and can only happen if the pathgroup is lost with an alias device already in use. Prevent the alias device from being used in this case. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

[S390] get rid of unused variables

2011-05-23T08:24:28Z

Remove trivially unused variables as detected with -Wunused-but-set-variable. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] dasd: prevent panic with unresumed devices

2011-01-31T10:30:20Z

If a device is not resumed correctly the system crashes when this device is set offline. This may happen if it gets disconnected during suspend. Check if the device is already removed from alias handling and skip these steps to prevent the kernel panic. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

[S390] dasd: remove uid from devmap

2010-05-17T08:00:16Z

Remove the duplicate of the DASD uid from the devmap structure. Use the uid from the device private structure instead. This also removes a lockdep warning complaining about a possible SOFTIRQ-safe -> SOFTIRQ-unsafe lock order. Signed-off-by: Stefan Haberland Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky