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2009-03-26[S390] cio: ccw group fix unbind behaviour.Sebastian Ott
For a ccw group device unbinding it from its driver should do the same as a call to ungroup, since this virtual device can not exist without a driver. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: fix sanity checks in ccwgroup driver.Sebastian Ott
Some sanity checks in the ccw group driver test the output of container_of macros to be !NULL. Test the input parameters instead. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: ccw group online store - report rcs to the caller.Sebastian Ott
In case the ccw group driver refuses to set a device [on|off]line, we should transmit the return code to the caller. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: airq - fix array boundarySebastian Ott
MAX_ISC is a valid isc number, so arrays with an index of isc need to have a length of MAX_ISC+1 Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: device scan oom fallback.Sebastian Ott
Since some callers rely on for_each_subchannel_staged to not fail, fall back to brute force scanning using get_subchannel_by_schid in case of a oom situation. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: ensure single load of irq handler pointerHeiko Carstens
Add barrier to prevent compiler from reloading pointer to irq handler. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio/crw: add/fix lockingHeiko Carstens
The crw_unregister_handler uses xchg + synchronize_sched when unregistering a crw_handler. This doesn't protect crw_collect_info to potentially jump to NULL since it has unlocked code like this: if (crw_handlers[i]) crw_handlers[i](NULL, NULL, 1); So add a mutex which protects the crw handler array for changes. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: ccw device online store - report rc from ccw driver.Sebastian Ott
In case the ccw driver refuses to set a device offline, we should transmit the return code to the caller. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: Use ccw_device_set_notoper().Cornelia Huck
Use ccw_device_set_notoper() (which also deletes the device timer and disables the subchannel) instead of simply setting the state to DEV_STATE_NOT_OPER in the generic not operational handling code. This prevents unexpected interrupts popping up for devices that are deemed not operational. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: Try harder to disable subchannel.Cornelia Huck
Acting upon the assumption that cio_disable_subchannel() is only called when we really want to disable the subchannel (a) remove the check for activity (it is already done in ccw_device_offline(), which is the place where it matters) (b) collect pending status via tsch() and ignore it (it can't matter anymore since the subchannel will be disabled). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] cio: Use unbind/bind instead of unregister/register.Cornelia Huck
The common I/O layer may encounter a situation where the device number of a ccw device has changed or a device driver doesn't want to keep a formerly disconnected device becoming operational again. Instead of using device_del()/ device_add() as now, we can just unbind the driver from the device and rebind it to get the desired effect (rebinding) with less overhead. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] split/move machine check handler codeHeiko Carstens
Split machine check handler code and move it to cio and kernel code where it belongs to. No functional change. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] ftrace: dont trace machine check handlerHeiko Carstens
The ftrace code is currently not reentrant, so we better don't trace our machine check handler. Machine checks are handled like NMIs on s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] delete drivers/s390/ebcdic.cHeiko Carstens
Dead file. Seems to be a leftover from the 2.4->2.5 conversion. The used and uptodate version of this file is in arch/s390/kernel. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] move sysinfo.c from drivers/s390 to arch/s390/kernelHeiko Carstens
All in sysinfo.c is core kernel code and not driver code. So move it to arch/s390/kernel. Also includes some small cleanups. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] dasd: message cleanupStefan Haberland
Moved some Messages into s390 debug feature and changed remaining messages to use the dev_xxx and pr_xxx macros. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] dasd: add High Performance FICON supportStefan Weinhuber
To support High Performance FICON, the DASD device driver has to translate I/O requests into the new transport mode control words (TCW) instead of the traditional (command mode) CCW requests. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] dasd: add large volume supportStefan Weinhuber
The dasd device driver will now support ECKD devices with more then 65520 cylinders. In the traditional ECKD adressing scheme each track is addressed by a 16-bit cylinder and 16-bit head number. The new addressing scheme makes use of the fact that the actual number of heads is never larger then 15, so 12 bits of the head number can be redefined to be part of the cylinder address. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] dasd_eckd / Write format R0 is now allowed BBJean-Baptiste Joret
Permission is now granted to the subsystem to format write R0 with: * an ID = CCHHR, where CC = physical cylinder number, HH = physical head number, and R = 0 * a key length of zero * a data length of eight * a data field containing all zeros Signed-off-by: Jean-Baptiste Joret <joret@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] dasd: enable compat ioctlsHeiko Carstens
All of the ioctls are compatible. Just enable them. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26[S390] Automatic IPL after dumpFrank Munzert
Provide new shutdown action "dump_reipl" for automatic ipl after dump. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-03-25qeth: fix wait_event_timeout handlingHeiko Carstens
wait_event_timeout just takes the numnber of jiffies to wait as an argument. That value does not include jiffies itself. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-25qeth: check for completion of a running recoveryUrsula Braun
When a recovery is started for a qeth device, additional invocations to change a mac address, to configure a VLAN interface on top, or to add multicast addresses should wait till recovery is finished, otherwise recovery might fail. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-25qeth: unregister MAC addresses during recovery.Klaus-Dieter Wacker
qeth: Unregister MAC addresses from device (layer 2) during recovery cycle. When the device is set online the MAC addresses are registered again on the device. Signed-off-by: Klaus-Dieter Wacker <kdwacker@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-25qeth: remove EDDPFrank Blaschka
Performance measurements showed EDDP does not lower CPU costs but increase them. So we dump out EDDP code from qeth driver. Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-25qeth: add statistics for tx csumFrank Blaschka
Add statistics counter for software tx checksumming. Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-25qeth: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24sysfs: only allow one scheduled removal callback per kobjAlex Chiang
The only way for a sysfs attribute to remove itself (without deadlock) is to use the sysfs_schedule_callback() interface. Vegard Nossum discovered that a poorly written sysfs ->store callback can repeatedly schedule remove callbacks on the same device over and over, e.g. $ while true ; do echo 1 > /sys/devices/.../remove ; done If the 'remove' attribute uses the sysfs_schedule_callback API and also does not protect itself from concurrent accesses, its callback handler will be called multiple times, and will eventually attempt to perform operations on a freed kobject, leading to many problems. Instead of requiring all callers of sysfs_schedule_callback to implement their own synchronization, provide the protection in the infrastructure. Now, sysfs_schedule_callback will only allow one scheduled callback per kobject. On subsequent calls with the same kobject, return -EAGAIN. This is a short term fix. The long term fix is to allow sysfs attributes to remove themselves directly, without any of this callback hokey pokey. [cornelia.huck@de.ibm.com: s390 ccwgroup bits] Reported-by: vegard.nossum@gmail.com Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24Driver core: Fix device_move() vs. dpm list ordering, v2Cornelia Huck
dpm_list currently relies on the fact that child devices will be registered after their parents to get a correct suspend order. Using device_move() however destroys this assumption, as an already registered device may be moved under a newly registered one. This patch adds a new argument to device_move(), allowing callers to specify how dpm_list should be adapted. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24Driver core: implement uevent suppress in kobjectMing Lei
This patch implements uevent suppress in kobject and removes it from struct device, based on the following ideas: 1,Uevent sending should be one attribute of kobject, so suppressing it in kobject layer is more natural than in device layer. By this way, we can do it for other objects embedded with kobject. 2,It may save several bytes for each instance of struct device.(On my omap3(32bit ARM) based box, can save 8bytes per device object) This patch also introduces dev_set|get_uevent_suppress() helpers to set and query uevent_suppress attribute in case to help kobject as private part of struct device in future. [This version is against the latest driver-core patch set of Greg,please ignore the last version.] Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24s390: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers
Cc: schwidefsky@de.ibm.com Cc: linux-s390@vger.kernel.org Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
2009-03-24claw: fix minor findings from code analysis toolAndrew H. Richter
This patch fixes two problems in the claw driver identified by static code analysis: o Change in case differentiation of received sense codes o Use correct data length in claw hard_start_xmit routine Signed-off-by: Andrew H. Richter <richtera@us.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24ctcm: fix minor findings from code analysis toolJoel A. Fowler
From: Ursula Braun <ursula.braun@de.ibm.com> This patch fixes problems in the ctcm driver identified by static code analysis: o remove an unnecessary always true condition in ctcm_unpack_skb o remove duplicate assignment in ctc_mpc_alloc_channel o remove an unnecessary always true condition in ctcmpc_send_sweep_resp o remove duplicate initialization in ctcmpc_unpack_skb o shorten if condition in mpc_action_go_inop o remove INOP event if mpc group is undefined in mpc_action_doxid7 Signed-off-by: Joel A. Fowler <fowlerja@us.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24ctcm: avoid wraparound in length of incoming dataRoel Kluin
Since the receive code should tolerate any incoming garbage, it should be protected against a potential wraparound when manipulating length values within incoming data. block_len is unsigned, so a too large subtraction will cause a wraparound. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24ctcm: invalid return code from hard_start_xmitUrsula Braun
Avoid kernel warning by using the correct hard_start_xmit return code NETDEV_TX_BUSY for skb requeuing. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24claw: invalid return codes from hard_start_xmitUrsula Braun
Avoid kernel warnings by using the correct hard_start_xmit return code NETDEV_TX_BUSY for skb requeuing. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24netiucv: invalid return code from hard_start_xmitUrsula Braun
Avoid kernel warning by using the correct hard_start_xmit return code NETDEV_TX_BUSY for skb requeuing. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24lcs: invalid return codes from hard_start_xmit.Klaus-Dieter Wacker
Lcs hard_start_xmit routine issued return codes other than defined for this interface. Now lcs returns only either NETDEV_TX_OK or NETDEV_TX_BUSY. Signed-off-by: Klaus-Dieter Wacker <kdwacker@de.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-24Use kthread instead of kernel_threadKlaus-Dieter Wacker
Lcs uses low-level kernel_thread implementation. All drivers should use <linux/kthread.h> API instead. Signed-off-by: Klaus-Dieter Wacker <kdwacker@de.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-12[SCSI] zfcp: Report fc_host_port_type as NPIVChristof Schmitt
Report the fc_host_port_type as FC_PORTTYPE_NPIV when the subchannel is running in NPIV mode. This allows to see the correct type with lsscsi -H -t --list Acked-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: Ensure all work is cancelled on adapter dequeueSwen Schillig
A scheduled work might still be pending, running while the adapter is in progress to get dequeued from the system. This can lead to an invalid pointer dereference (Oops). Once the adpater is set online again, ensure the nameserver environment is initialized to the appropriate values again. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: fix queue, scheduled work processing.Swen Schillig
Ensure the refcounting is correct even if we were not able to schedule a work. In addition we have to make sure no scheduled work is pending while we're dequeing the adapter from the systems environment. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: erp failed status bit will not be setMartin Petermann
It will not be necessary to set the erp failed status bit in case a SCSI device is removed by the SCSI mid layer. In the case a SCSI device is unavailable for a short time (15 to 20 seconds) a FCP unit will not get on-line again. Signed-off-by: Martin Petermann <martin@linux.vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: Block FC transport rports early on errorsChristof Schmitt
Use the I/O blocking mechanism in the FC transport class to allow faster failovers for multipathing: - Call fc_remote_port_delete early to set the rport to BLOCKED. - Check the rport status in queuecommand with fc_remote_portchkready to no longer accept new I/O for this port and fail the I/O with the appropriate scsi_cmnd result. - Implement the terminate_rport_io handler to abort all pending I/O requests - Return SCSI commands with DID_TRANSPORT_DISRUPTED while erp is running. - When updating the remote port status, check for late changes and update the remote ports status accordingly. Acked-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: incorrect reaction on incoming RSCNSwen Schillig
After an error condition resolved a remote storage port was never re-opened. The incoming RSCN was not processed accordingly due to a misinterpreted status flag / return value combination. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: Remove PCI flagChristof Schmitt
The usage of the PCI flag to trigger interrupts is optional. Even without setting the flag, qdio still receives interrupts to continue working on the queue. Remove the PCI flag from zfcp, it is not necessary. Acked-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: replace current ERP logging with a more convenient versionSwen Schillig
The current number based id ERP logging is replaced by a string based tag version. The benefit is an easier location of the code in question and the removal of the lengthy array referencing the individual messages. The string (7 bytes) based version does not use more space since those bytes were "used" anyway due to the alignment of the structure. The encoding of the 7 byte string is as follows [0-1] = filename [2-5] = task/function [6] = section Due to the character of this string (fixed length) a string termination is not required here. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: prevent adapter close on initial adapter openSwen Schillig
An adapter close was always performed whether it was required, (e.g. in an error scenario) or not (e.g. initial open). This patch is changing the process in only doing an adapter close when it is required. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: remove undefined subtype for status read responseSwen Schillig
The status read response FSF_STATUS_READ_SUB_ERROR_PORT is not defined in the specs and therefore not valid. All occurrences are removed from the code. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] zfcp: Send ELS ADISC from workqueueChristof Schmitt
Issue ELS ADISC requests from workqueue. This allows the link test request to be sent when the request queue is full due to I/O load for other remote ports. It also simplifies request queue locking, zfcp_fsf_send_fcp_command_task is now the only function that has interrupts disabled from the caller. This is also a prereq for the FC passthrough support that issues ELS requests from userspace. Acked-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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