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  1. 17 Nov, 2008 10 commits
  3. 16 Nov, 2008 5 commits
  5. 15 Nov, 2008 17 commits
  7. 14 Nov, 2008 8 commits
    • Tejun Heo's avatar
      libata: improve phantom device detection · 6a6b97d3
      Tejun Heo authored 
      Currently libata uses four methods to detect device presence.

1. PHY status if available.
2. TF register R/W test (only promotes presence, never demotes)
3. device signature after reset
4. IDENTIFY failure detection in SFF state machine

Combination of the above works well in most cases but recently there
have been a few reports where a phantom device causes unnecessary
delay during probe.  In both cases, PHY status wasn't available.  In
one case, it passed #2 and #3 and failed IDENTIFY with ATA_ERR which
didn't qualify as #4.  The other failed #2 but as it passed #3 and #4,
it still caused failure.

In both cases, phantom device reported diagnostic failure, so these
cases can be safely worked around by considering any !ATA_DRQ IDENTIFY
failure as NODEV_HINT if diagnostic failure is set.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      6a6b97d3
    • Randy Dunlap's avatar
      9p: restrict RDMA usage · 4ff429e6
      Randy Dunlap authored 
      linux-next:

Make 9p's RDMA option depend on INET since it uses Infiniband rdma_*
functions and that code depends on INET.  Otherwise 9p can try to
use symbols which don't exist.

ERROR: "rdma_destroy_id" [net/9p/9pnet_rdma.ko] undefined!
ERROR: "rdma_connect" [net/9p/9pnet_rdma.ko] undefined!
ERROR: "rdma_create_id" [net/9p/9pnet_rdma.ko] undefined!
ERROR: "rdma_create_qp" [net/9p/9pnet_rdma.ko] undefined!
ERROR: "rdma_resolve_route" [net/9p/9pnet_rdma.ko] undefined!
ERROR: "rdma_disconnect" [net/9p/9pnet_rdma.ko] undefined!
ERROR: "rdma_resolve_addr" [net/9p/9pnet_rdma.ko] undefined!

I used an if/endif block so that the menu items would remain
presented together.

Also correct an article adjective.
Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      4ff429e6
    • Randy Dunlap's avatar
      Create/use more directory structure in the Documentation/ tree. · 31c00fc1
      Randy Dunlap authored 
      Create Documentation/blockdev/ sub-directory and populate it.
Populate the Documentation/serial/ sub-directory.
Move MSI-HOWTO.txt to Documentation/PCI/.
Move ioctl-number.txt to Documentation/ioctl/.
Update all relevant 00-INDEX files.
Update all relevant Kconfig files and source files.
Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
      31c00fc1
    • Martin Schwidefsky's avatar
      [S390] fix s390x_newuname · d2f019fe
      Martin Schwidefsky authored 
      The uname system call for 64 bit compares current->personality without
masking the upper 16 bits. If e.g. READ_IMPLIES_EXEC is set the result
of a uname system call will always be s390x even if the process uses
the s390 personality.
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      d2f019fe
    • Stefan Haberland's avatar
      [S390] dasd: log sense for fatal errors · a9cffb22
      Stefan Haberland authored 
      The logging of sense data for fatal errors was accidentally removed
during Hyper PAV implementation.
Signed-off-by: default avatarStefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      a9cffb22
    • Heiko Carstens's avatar
      [S390] cpu topology: fix locking · 74af2831
      Heiko Carstens authored 
      cpu_coregroup_map used to grab a mutex on s390 since it was only
called from process context.
Since c7c22e4d "block: add support
for IO CPU affinity" this is not true anymore.
It now also gets called from softirq context.

To prevent possible deadlocks change this in architecture code and
use a spinlock instead of a mutex.

Cc: stable@kernel.org
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      74af2831
    • Cornelia Huck's avatar
      [S390] cio: Fix refcount after moving devices. · 85acc407
      Cornelia Huck authored 
      In ccw_device_move_to_orphanage(), a replacing ccw_device
is searched via get_{disc,orphaned}_ccwdev_by_dev_id()
which obtain a reference on the returned ccw_device.
This reference must be given up again after the device
has been moved to its new parent.
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      85acc407
    • Heiko Carstens's avatar
      [S390] ftrace: fix kernel stack backchain walking · 50bec4ce
      Heiko Carstens authored 
      With CONFIG_IRQSOFF_TRACER the trace_hardirqs_off() function includes
a call to __builtin_return_address(1). But we calltrace_hardirqs_off()
from early entry code. There we have just a single stack frame.
So this results in a kernel stack backchain walk that would walk beyond
the kernel stack. Following the NULL terminated backchain this results
in a lowcore read access.

To fix this we simply call trace_hardirqs_off_caller() and pass the
current instruction pointer.
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      50bec4ce