linux-stable.git/drivers/s390/block, branch linux-3.8.y

s390/irq: remove split irq fields from /proc/stat

2013-01-08T09:57:07+00:00

Now that irq sum accounting for /proc/stat's "intr" line works again we
have the oddity that the sum field (first field) contains only the sum
of the second (external irqs) and third field (I/O interrupts).
The reason for that is that these two fields are already sums of all other
fields. So if we would sum up everything we would count every interrupt
twice.
This is broken since the split interrupt accounting was merged two years
ago: 052ff461c8427629aee887ccc27478fc7373237c "[S390] irq: have detailed
statistics for interrupt types".
To fix this remove the split interrupt fields from /proc/stat's "intr"
line again and only have them in /proc/interrupts.

This restores the old behaviour, seems to be the only sane fix and mimics
a behaviour from other architectures where /proc/interrupts also contains
more than /proc/stat's "intr" line does.

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

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2012-12-13T22:20:19+00:00

Pull s390 update from Martin Schwidefsky:
 "Add support to generate code for the latest machine zEC12, MOD and XOR
  instruction support for the BPF jit compiler, the dasd safe offline
  feature and the big one: the s390 architecture gets PCI support!!
  Right before the world ends on the 21st ;-)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (41 commits)
  s390/qdio: rename the misleading PCI flag of qdio devices
  s390/pci: remove obsolete email addresses
  s390/pci: speed up __iowrite64_copy by using pci store block insn
  s390/pci: enable NEED_DMA_MAP_STATE
  s390/pci: no msleep in potential IRQ context
  s390/pci: fix potential NULL pointer dereference in dma_free_seg_table()
  s390/pci: use kmem_cache_zalloc instead of kmem_cache_alloc/memset
  s390/bpf,jit: add support for XOR instruction
  s390/bpf,jit: add support MOD instruction
  s390/cio: fix pgid reserved check
  vga: compile fix, disable vga for s390
  s390/pci: add PCI Kconfig options
  s390/pci: s390 specific PCI sysfs attributes
  s390/pci: PCI hotplug support via SCLP
  s390/pci: CHSC PCI support for error and availability events
  s390/pci: DMA support
  s390/pci: PCI adapter interrupts for MSI/MSI-X
  s390/bitops: find leftmost bit instruction support
  s390/pci: CLP interface
  s390/pci: base support
  ...

s390/dasd: add safe offline interface

2012-11-30T14:40:44+00:00

The regular behavior of the DASD device driver when setting a device
offline is to return all outstanding I/O as failed. This behavior is
different from that of other System z operating systems and may lead
to unexpected data loss. Adding an explicit 'safe' offline function
will allow customers to use DASDs in the way they expect them to work.

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

s390/dasd: fix unaccessible device after resume

2012-11-30T14:40:42+00:00

If a channel path is cabled incorrectly and the device is suspended and
resumed the device may be inaccessible afterwards.
Make the path connection check not interrupt the resume callback there
could be other valid paths available.

Signed-off-by: Stefan Haberland 
Reference-ID: RQM 1262
Signed-off-by: Martin Schwidefsky

s390: use ccw_device_get_schid

2012-11-23T10:14:28+00:00

Let the dasd driver and qdio use ccw_device_get_schid and
get rid of other similar functions.

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

s390/dasd: fix multi-line printks with multiple KERN_s

2012-11-23T10:14:26+00:00

Do not use more than one KERN_ per printk.

Signed-off-by: Sebastian Ott 
Acked-by: Stefan Haberland 
Signed-off-by: Martin Schwidefsky

Fix misspellings of "whether" in comments.

2012-11-19T13:31:35+00:00

"Whether" is misspelled in various comments across the tree; this
fixes them. No code changes.

Signed-off-by: Adam Buchbinder 
Signed-off-by: Jiri Kosina

s390/dcssblk: cleanup device attribute usage

2012-10-09T12:16:56+00:00

Let the driver core handle device attribute creation and removal. This
will simplify the code and eliminates races between attribute
availability and userspace notification via uevents.

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

s390/dasd: check count address during online setting

2012-09-26T13:45:26+00:00

A common way to prepare a z/VM mini disk is to format the real device
with a z/VM tool like CPFMTXA and then define a mini disk that excludes
the first cylinder, i.e. the cylinder 0 of the virtual disk is located
at cylinder 1 of the real device.

The DASD device driver will recognize such a mini disk as formatted, as
the uniform record layout on the disk matches that of an LDL formatted
device. However, the cylinder value in the 'count' field of the ECKD
records matches the geometry of the real device, and not that of the
mini disk, so I/O requests will fail with 'record not found' errors.

To make the mini disk usable, it needs to be formatted with a tool like
dasdfmt. To enable tools like distribution installation tools to
recognize this situation, the DASD device driver should report such a
mini disk as 'not formatted'.
To this end we need to extend the device recognition code to check not
just for proper record sizes, but also for proper cylinder/head/record
values.

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

s390/etr,stp: use -EOPNOTSUPP instead of -ENOSYS

2012-09-26T13:45:14+00:00

Change -ENOSYS to -EOPNOTSUPP. Return value is used only internally.

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