linux-toradex.git/drivers/s390, branch v2.6.27.12

[S390] qdio: prevent stack clobber

2008-10-03T19:55:55+00:00

Don't print more information than fits into the string on the
stack. Combine the informational output of qdio to fit into
one line.

Signed-off-by: Jan Glauber 
Signed-off-by: Martin Schwidefsky

[S390] cio: fix orb initialization in cio_start_key

2008-09-16T16:34:32+00:00

The functions cio_tm_start_key and cio_start_key use the same private
orb structure of a subchannel, so the orb needs to be cleared of old
data before it is used again. A respective memset is missing from
cio_start_key and hereby added.

Signed-off-by: Stefan Weinhuber 
Acked-by: Cornelia Huck 
Signed-off-by: Martin Schwidefsky

[S390] cio: Fix driver_data handling for ccwgroup devices.

2008-09-16T16:34:31+00:00

Since 16f7f9564c3ae190954f2ec55f385a268b93ac4d, we've seen
oopses when grouping/ungrouping devices:

Unable to handle kernel pointer dereference at virtual kernel address 0000000000
114000
Oops: 0004 [#1] PREEMPT SMP
Modules linked in: bonding qeth_l2 dm_multipath sunrpc qeth_l3 dm_mod qeth chsc_
sch ccwgroup
CPU: 1 Not tainted 2.6.26-29.x.20080815-s390xdefault #1
Process iperf (pid: 24412, task: 000000003f446038, ksp: 000000003c929e08)
Krnl PSW : 0404d00180000000 000003e00006f6e6 (qeth_irq+0xda/0xb28 [qeth])
           R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 EA:3
Krnl GPRS: 0000000000000000 000003e000000003 0000000000000000 0000000000114ccc
           000000003fb82e48 000003e00006f60c 000000000000000c 000000003ce72100
           0000000000114944 000000003fb82e48 0000000000114ccc 000000003fe8fd28
           000003e000066000 000003e000076128 000000003fe8fdb8 000000003fe8fd28
Krnl Code: 000003e00006f6da: bf3f2024            icm     %r3,15,36(%r2)
           000003e00006f6de: a774023c            brc     7,3e00006fb56
           000003e00006f6e2: a7280000            lhi     %r2,0
          >000003e00006f6e6: 5020a1a0            st      %r2,416(%r10)
           000003e00006f6ea: 58109000            l       %r1,0(%r9)
           000003e00006f6ee: a7111000            tmll    %r1,4096
           000003e00006f6f2: a77400f9            brc     7,3e00006f8e4
           000003e00006f6f6: 8810000c            srl     %r1,12
Call Trace:
([<000000003fe8fd20>] 0x3fe8fd20)
 [<000000000033bf2a>] ccw_device_call_handler+0xb2/0xd8
 [<0000000000339e1c>] ccw_device_irq+0x124/0x164
 [<0000000000339758>] io_subchannel_irq+0x8c/0x118
 [<00000000003309ba>] do_IRQ+0x192/0x1bc
 [<0000000000114f66>] io_return+0x0/0x8
 [<00000000001149cc>] sysc_do_svc+0x0/0x22
([<0000000000114a18>] sysc_noemu+0x10/0x16)
 [<00000200002e047c>] 0x200002e047c
Last Breaking-Event-Address:
 [<000003e00006f6d6>] qeth_irq+0xca/0xb28 [qeth]

The problem is that dev->driver_data for a ccw device is NULL,
while it should point to the ccwgroup device it is a member of.
This happened due to incorrect cleanup if creating a ccwgroup
device failed because the ccw devices were already grouped.

Fix this by setting cdev[i] to NULL in the error handling of
ccwgroup_create_from_string() after we give up our reference and
by checking if the driver_data points to the ccwgroup device in
ccwgroup_release() just to be really sure.

Signed-off-by: Cornelia Huck 
Signed-off-by: Martin Schwidefsky

Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6

2008-09-11T15:41:17+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] fix check of PQ and PDT bits for WLUNs
  [SCSI] make scsi_check_sense HARDWARE_ERROR return ADD_TO_MLQUEUE on retry
  [SCSI] scsi_dh: make check_sense return ADD_TO_MLQUEUE
  [SCSI] zfcp: Remove duplicated unlikely() macros.
  [SCSI] zfcp: channel cannot be detached due to refcount imbalance
  [SCSI] zfcp: Fix reference counter for remote ports
  [SCSI] zfcp: Simplify ccw notify handler
  [SCSI] zfcp: Correctly query end flag in gpn_ft response
  [SCSI] zfcp: Fix request queue locking
  [SCSI] sd: select CRC_T10DIF only when necessary

[S390] cio: allow offline processing for disconnected devices

2008-09-09T10:39:07+00:00

When disconnected ccw devices are removed, the device has to be set
offline, otherwise there will be side effects including a reference
count imbalance. This patch modifies ccw_device_offline to work for
devices in disconnecte/not operational state. ccw_device_offline is
called by cio for devices which are online during device removal.

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

[S390] cio: handle ssch() return codes correctly.

2008-09-09T10:39:07+00:00

ssch() has two classes of return codes:
- condition codes (0-3) which need to be translated to Linux
  error codes
- Linux error codes (-EIO on exceptions) which should be passed
  to the caller (instead of erronously being handled like
  condition code 3)

Signed-off-by: Cornelia Huck 
Signed-off-by: Martin Schwidefsky

[S390] cio: Correct cleanup on error.

2008-09-09T10:39:07+00:00

Fix cleanup on error in chp_new() and init_channel_subsystem()
(must not call kfree() on structures that had been registered).

Signed-off-by: Cornelia Huck 
Signed-off-by: Martin Schwidefsky

[SCSI] zfcp: Remove duplicated unlikely() macros.

2008-08-29T14:05:05+00:00

Some drivers have duplicated unlikely() macros. IS_ERR() already
has unlikely() in itself. This patch cleans up such pointless
codes although there is no real effect on the kernel's behaviour.

Signed-off-by: Hirofumi Nakagawa 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: channel cannot be detached due to refcount imbalance

2008-08-29T14:04:52+00:00

Due to an imbalance of the nameserver refcounting, channel devices
couldn't be take offline anymore after the channel was activated.

Signed-off-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Fix reference counter for remote ports

2008-08-29T14:04:35+00:00

Fix the remote port reference counter handling during ELS ADISC
commands and find the remote port by WWPN not by D_IDs that could
change.

Signed-off-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley