linux-stable.git/drivers/s390, branch v3.7.4

s390/cio: fix pgid reserved check

2013-01-17T16:45:54+00:00

commit d99e79ec5574fc556c988f613ed6175f6de66f4a upstream.

The check to whom a device is reserved is done by checking the path
state of the affected channel paths. If it turns out that one path is
flagged as reserved by someone else the whole device is marked as such.

However the meaning of the RESVD_ELSE bit is that the addressed device
is reserved to a different pathgroup (and not reserved to a different
LPAR). If we do this test on a path which is currently not a member of
the pathgroup we could erroneously mark the device as reserved to
someone else.

To fix this collect the reserved state for all potential members of the
pathgroup and only mark the device as reserved if all of those potential
members have the RESVD_ELSE bit set.

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

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2012-11-16T22:10:15+00:00

Pull networking updates from David Miller:

 1) tx_filtered/ps_tx_buf queues need to be accessed with the SKB queue
    lock, from Arik Nemtsov.

 2) Don't call 802.11 driver's filter configure method until it's
    actually open, from Felix Fietkau.

 3) Use ieee80211_free_txskb otherwise we leak control information.
    From Johannes Berg.

 4) Fix memory leak in bluetooth UUID removal,f rom Johan Hedberg.

 5) The shift mask trick doesn't work properly when 'optname' is out of
    range in do_ip_setsockopt().  Use a straightforward switch statement
    instead, the compiler emits essentially the same code but without
    the missing range check.  From Xi Wang.

 6) Fix when we call tcp_replace_ts_recent() otherwise we can
    erroneously accept a too-high tsval.  From Eric Dumazet.

 7) VXLAN bug fixes, mostly to do with VLAN header length handling, from
    Alexander Duyck.

 8) Missing return value initialization for IPV6_MINHOPCOUNT socket
    option handling.  From Hannes Frederic.

 9) Fix regression in tasklet handling in jme/ksz884x/xilinx drivers,
    from Xiaotian Feng.

10) At smsc911x driver init time, we don't know if the chip is in word
    swap mode or not.  However we do need to wait for the control
    register's ready bit to be set before we program any other part of
    the chip.  Adjust the wait loop to account for this.  From Kamlakant
    Patel.

11) Revert erroneous MDIO bus unregister change to mdio-bitbang.c

12) Fix memory leak in /proc/net/sctp/, from Tommi Rantala.

13) tilegx driver registers IRQ with NULL name, oops, from Simon Marchi.

14) TCP metrics hash table kzalloc() based allocation can fail, back
    down to using vmalloc() if it does.  From Eric Dumazet.

15) Fix packet steering out-of-order delivery regression, from Tom
    Herbert.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (40 commits)
  net-rps: Fix brokeness causing OOO packets
  tcp: handle tcp_net_metrics_init() order-5 memory allocation failures
  batman-adv: process broadcast packets in BLA earlier
  batman-adv: don't add TEMP clients belonging to other backbone nodes
  batman-adv: correctly pass the client flag on tt_response
  batman-adv: fix tt_global_entries flags update
  tilegx: request_irq with a non-null device name
  net: correct check in dev_addr_del()
  tcp: fix retransmission in repair mode
  sctp: fix /proc/net/sctp/ memory leak
  Revert "drivers/net/phy/mdio-bitbang.c: Call mdiobus_unregister before mdiobus_free"
  net/smsc911x: Fix ready check in cases where WORD_SWAP is needed
  drivers/net: fix tasklet misuse issue
  ipv4/ip_vti.c: VTI fix post-decryption forwarding
  brcmfmac: fix typo in CONFIG_BRCMISCAN
  vxlan: Update hard_header_len based on lowerdev when instantiating VXLAN
  vxlan: fix a typo.
  ipv6: setsockopt(IPIPPROTO_IPV6, IPV6_MINHOPCOUNT) forgot to set return value
  doc/net: Fix typo in netdev-features.txt
  vxlan: Fix error that was resulting in VXLAN MTU size being 10 bytes too large
  ...

s390/3215: fix tty close handling

2012-11-15T15:33:09+00:00

The 3215 console always has the RAW3215_FIXED flag set, which causes
raw3215_shutdown() not to wait for outstanding I/O requests if an attached
tty gets closed.
The flag however can be simply removed, so we can guarantee that all requests
belonging to the tty have been processed when the tty is closed.

However the tasklet that belongs to the 3215 device may be scheduled even if
there is no tty attached anymore, since we have a race between console and tty
processing.
Thefore unconditional tty_wakekup() in raw3215_wakeup() can cause the following
NULL pointer dereference:

3.465368 Unable to handle kernel pointer dereference at virtual kernel address (null)
3.465448 Oops: 0004 #1 SMP
3.465454 Modules linked in:
3.465459 CPU: 1 Not tainted 3.6.0 #1
3.465462 Process swapper/1 (pid: 0, task: 000000003ffa4428, ksp: 000000003ffb7ce0)
3.465466 Krnl PSW : 0404100180000000 0000000000162f86 (__wake_up+0x46/0xb8)
3.465480            R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:0 CC:1 PM:0 EA:3
         Krnl GPRS: fffffffffffffffe 0000000000000000 0000000000000160 0000000000000001
3.465492            0000000000000001 0000000000000004 0000000000000004 000000000096b490
3.465499            0000000000000001 0000000000000100 0000000000000001 0000000000000001
3.465506            070000003fc87d60 0000000000000160 000000003fc87d68 000000003fc87d00
3.465526 Krnl Code: 0000000000162f76: e3c0f0a80004      lg      %r12,168(%r15)
                    0000000000162f7c: 58000370          l       %r0,880
                   #0000000000162f80: c007ffffffff00    xilf    %r0,4294967295
                   >0000000000162f86: ba102000          cs      %r1,%r0,0(%r2)
                    0000000000162f8a: 1211              ltr     %r1,%r1
                    0000000000162f8c: a774002f          brc     7,162fea
                    0000000000162f90: b904002d          lgr     %r2,%r13
                    0000000000162f94: b904003a          lgr     %r3,%r10
3.465597 Call Trace:
3.465599 (<0400000000000000> 0x400000000000000)
3.465602  <000000000048c77e> raw3215_wakeup+0x2e/0x40
3.465607  <0000000000134d66> tasklet_action+0x96/0x168
3.465612  <000000000013423c> __do_softirq+0xd8/0x21c
3.465615  <0000000000134678> irq_exit+0xa8/0xac
3.465617  <000000000046c232> do_IRQ+0x182/0x248
3.465621  <00000000005c8296> io_return+0x0/0x8
3.465625  <00000000005c7cac> vtime_stop_cpu+0x4c/0xb8
3.465629 (<0000000000194e06> tick_nohz_idle_enter+0x4e/0x74)
3.465633  <0000000000104760> cpu_idle+0x170/0x184
3.465636  <00000000005b5182> smp_start_secondary+0xd6/0xe0
3.465641  <00000000005c86be> restart_int_handler+0x56/0x6c
3.465643  <0000000000000000> 0x0
3.465645 Last Breaking-Event-Address:
3.465647  <0000000000403136> tty_wakeup+0x46/0x98
3.465652
3.465654 Kernel panic - not syncing: Fatal exception in interrupt
01: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 0010F63C

The easiest solution is simply to check if tty is NULL in the tasklet.
If it is NULL nothing is to do (no tty attached), otherwise tty_wakeup()
can be called, since we hold a reference to the tty.
This is not nice... but it is a small patch and it works.

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

qeth: set new mac even if old mac is gone

2012-11-13T19:31:21+00:00

If the set_mac_address() function of qeth is invoked, qeth deletes
the old mac address first on OSA. Only if deletion returns
successfully the new mac address is set on OSA. Deletion may return
with a return value "MAC not found on OSA". In this case qeth
should continue setting the new mac address.

When the OSA cable is pulled, OSA forgets any set mac address. If
the OSA network interface acts as a slave to a bonding master
interface, bonding can invoke the set_mac_address function for
failover purposes and depends on successful setting of the new mac
address even though the old mac address could no longer be deleted.

Signed-off-by: Ursula Braun 
Signed-off-by: Frank Blaschka 
Signed-off-by: David S. Miller

qeth: Fix IPA_CMD_QIPASSIST return code handling

2012-11-13T19:31:21+00:00

Return codes of IPA_CMD_QIPASSIST are not checked, especially the ones which
indicate that the command is not supported. As a result, the device driver
would not enable all available features on older card generations.
This patch adds proper checking and sets the bare minimum in the supported
functions flags to avoid follow-on errors.

Signed-off-by: Stefan Raspl 
Signed-off-by: Frank Blaschka 
Reviewed-by: Ursula Braun 
Signed-off-by: David S. Miller

s390/cio: fix length calculation in idset.c

2012-11-06T21:39:54+00:00

bitmap_or uses the number of bits as its length parameter and
not the number of words necessary to store those bits.

This fixes a regression introduced by:
	aa92b33 s390/cio: use generic bitmap functions

Reported-by: Christian Ehrhardt 
Acked-by: Peter Oberparleiter 
Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

s390: Move css limits from drivers/s390/cio/ to include/asm/.

2012-11-06T21:39:49+00:00

There's no need to keep __MAX_SUBCHANNEL and __MAX_SSID private to the
common I/O layer when __MAX_CSSID is usable by everybody.

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

s390/cio: suppress 2nd path verification during resume

2012-10-26T14:44:22+00:00

Do not trigger a path verification in the subchannel event
function during resume from hibernate. This will be started
by the pm_restore callback later.

Signed-off-by: Sebastian Ott 
Reviewed-by: Peter Oberparleiter 
Signed-off-by: Martin Schwidefsky

s390/css: stop stsch loop after cc 3

2012-10-18T15:50:08+00:00

Receiving cc=3 from store subchannel means 2 things:
* the subchannel is not provided
* there are no further subchannels in this subchannel set

With this patch we abort the store subchannel loop after cc=3 (or an
exception) and clear the subsequent bits in the subchannel id set.

Reported-by: Cornelia Huck 
Signed-off-by: Sebastian Ott 
Acked-by: Peter Oberparleiter 
Signed-off-by: Martin Schwidefsky

s390/cio: use generic bitmap functions

2012-10-18T15:50:08+00:00

Use generic bitmap functions in the subchannel id bitmap to
simplify and de-bloat the code.

Signed-off-by: Sebastian Ott 
Acked-by: Peter Oberparleiter 
Signed-off-by: Martin Schwidefsky