linux-toradex.git/drivers/s390/block/dasd_eckd.c, branch v3.4.9

[S390] drivers/s390/block/dasd_eckd.c: add missing dasd_sfree_request

2012-04-11T12:28:24+00:00

Extend some error paths to call dasd_sfree_request as done earlier in the
function.  The error-handling code is also moved to the end of the function.

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

[S390] dasd: prevent validate server for offline devices

2012-03-11T15:59:29+00:00

Calling validate server on devices in offline processing may cause
an OOPS in the dasd_sleep_on function.

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

compat: fix compile breakage on s390

2012-02-27T15:54:27+00:00

The new is_compat_task() define for the !COMPAT case in
include/linux/compat.h conflicts with a similar define in
arch/s390/include/asm/compat.h.

This is the minimal patch which fixes the build issues.

Signed-off-by: Heiko Carstens 
Signed-off-by: Linus Torvalds

[S390] dasd: revalidate server for new pathgroup

2012-01-18T17:03:42+00:00

If a pathgroup is established we get an event and have to revalidate
the server to propagate supported features like PAV and enable them.

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

[S390] dasd: revert LCU optimization

2012-01-18T17:03:42+00:00

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

2011-12-27T10:27:14+00:00

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] dasd: add sanity check to detect path connection error

2011-12-27T10:27:14+00:00

Prevents possible data corruption by detecting cabling error.
Therefor read and compare the UID for all available channel paths.

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

[S390] sparse: fix sparse NULL pointer warnings

2011-10-30T14:16:46+00:00

Fix two NULL pointer warnings in the dasd driver:

drivers/s390/block/dasd_eckd.c:2353:20: warning: Using plain integer as NULL pointer
drivers/s390/block/dasd_eckd.c:2415:44: warning: Using plain integer as NULL pointer

Signed-off-by: Martin Schwidefsky

[S390] dasd: prevent path verification before resume

2011-10-30T14:16:45+00:00

Mark the device as suspended and delay execution of the path
verification worker to prevent mix-up.

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

[S390] dasd: re-initialize read_conf buffer for retries

2011-10-30T14:16:44+00:00

The buffer for read configuration data has to be initialized with an
EBCDIC string to show support for extended UIDs to z/VM.
If this read configuration data CQR needs to be retried, the buffer
may have changed in between. So re-initialize the buffer to get a
correct extended UID under z/VM.

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