linux-stable.git/drivers/s390, branch v3.1.2

ccwgroup: move attributes to attribute group

2011-11-11T17:43:22+00:00

commit dbdf1afcaaabe83dea15a3cb9b9013e73ae3b1ad upstream.

Put sysfs attributes of ccwgroup devices in an attribute group to
ensure that these attributes are actually present when userspace
is notified via uevents.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky 
Signed-off-by: Greg Kroah-Hartman

[S390] cio: fix cio_tpi ignoring adapter interrupts

2011-09-26T14:40:50+00:00

Ensure that adapter interrupts are correctly processed when they are
retrieved using TEST PENDING INTERRUPTION.

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

[S390] memory hotplug: only unassign assigned increments

2011-08-24T15:15:24+00:00

Make sure that only assigned storage increments are unassigned when
attaching a storage element.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] drivers/s390/block/dasd_ioctl.c: add missing kfree

2011-08-24T15:15:23+00:00

Data is only used to temporarily hold information to be copied to the user
level, so it should be freed before leaving the function.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// 
@exists@
local idexpression x;
statement S,S1;
expression E;
identifier fl;
expression *ptr != NULL;
@@

x = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
     when != if (...) { <+...kfree(x)...+> }
     when any
     when != true x == NULL
x->fl
...>
(
if (x == NULL) S1
|
if (...) { ... when != x
               when forall
(
 return \(0\|<+...x...+>\|ptr\);
|
* return ...;
)
}
)
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] qdio: Use kstrtoul_from_user

2011-08-03T14:44:21+00:00

This patch replaces the code for getting an unsigned long from a
userspace buffer by a simple call to kstroul_from_user.
This makes it easier to read and less error prone.

Signed-off-by: Peter Huewe 
Acked-by: Jan Glauber 
Signed-off-by: Heiko Carstens

[S390] sclp_async: Use kstrtoul_from_user

2011-08-03T14:44:20+00:00

This patch replaces the code for getting an unsigned long from a
userspace buffer by a simple call to kstroul_from_user.
This makes it easier to read and less error prone.

Signed-off-by: Peter Huewe 
Signed-off-by: Heiko Carstens

[S390] dasd: check if raw track access is supported

2011-08-03T14:44:19+00:00

To use raw track access some special storage server commands are
needed. Older storage hardware may not support these commands.
So check if raw track access is possible while setting the DASD
online.

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

[S390] dasd: use vmalloc for statistics input buffer

2011-08-03T14:44:19+00:00

The size of the buffer that is used to store DASD statistics input
strings depends on the user input. If the input string is to large,
the write operation could fail with -ENOMEM. To avoid this, use
vmalloc instead of kmalloc.

Signed-off-by: Stefan Weinhuber 
Signed-off-by: Heiko Carstens

[S390] qdio: 2nd stage retry on SIGA-W busy conditions

2011-08-03T14:44:19+00:00

The SIGA-W may return with the busy bit set which means the device was
blocked. The busy loop which retries the SIGA-W for 100us may not be
long enough when running under a heavily loaded hypervisor.

Extend the retry mechanism by adding a longer second stage which retries
the SIGA-W for up to 10s. In difference to the first retry loop the second
stage is using mdelay to stop the cpu between the retries and thereby
avoid additional preassure in on the hypervisor.
If the second stage retry is successfull a device reset is avoided.

Signed-off-by: Jan Glauber 
Signed-off-by: Heiko Carstens

atomic: use

2011-07-26T23:49:47+00:00

This allows us to move duplicated code in 
(atomic_inc_not_zero() for now) to 

Signed-off-by: Arun Sharma 
Reviewed-by: Eric Dumazet 
Cc: Ingo Molnar 
Cc: David Miller 
Cc: Eric Dumazet 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds