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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2009-03-28
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (119 commits) [SCSI] scsi_dh_rdac: Retry for NOT_READY check condition [SCSI] mpt2sas: make global symbols unique [SCSI] sd: Make revalidate less chatty [SCSI] sd: Try READ CAPACITY 16 first for SBC-2 devices [SCSI] sd: Refactor sd_read_capacity() [SCSI] mpt2sas v00.100.11.15 [SCSI] mpt2sas: add MPT2SAS_MINOR(221) to miscdevice.h [SCSI] ch: Add scsi type modalias [SCSI] 3w-9xxx: add power management support [SCSI] bsg: add linux/types.h include to bsg.h [SCSI] cxgb3i: fix function descriptions [SCSI] libiscsi: fix possbile null ptr session command cleanup [SCSI] iscsi class: remove host no argument from session creation callout [SCSI] libiscsi: pass session failure a session struct [SCSI] iscsi lib: remove qdepth param from iscsi host allocation [SCSI] iscsi lib: have lib create work queue for transmitting IO [SCSI] iscsi class: fix lock dep warning on logout [SCSI] libiscsi: don't cap queue depth in iscsi modules [SCSI] iscsi_tcp: replace scsi_debug/tcp_debug logging with iscsi conn logging [SCSI] libiscsi_tcp: replace tcp_debug/scsi_debug logging with session/conn logging ...
| * [SCSI] zfcp: Report fc_host_port_type as NPIVChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: Ensure all work is cancelled on adapter dequeueSwen Schillig2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: fix queue, scheduled work processing.Swen Schillig2009-03-12
| | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: erp failed status bit will not be setMartin Petermann2009-03-12
| | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: Block FC transport rports early on errorsChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: incorrect reaction on incoming RSCNSwen Schillig2009-03-12
| | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: Remove PCI flagChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: replace current ERP logging with a more convenient versionSwen Schillig2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: prevent adapter close on initial adapter openSwen Schillig2009-03-12
| | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: remove undefined subtype for status read responseSwen Schillig2009-03-12
| | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: Send ELS ADISC from workqueueChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * [SCSI] zfcp: Improve reliability of SCSI eh handlers in zfcpChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When the SCSI midlayer is running error recovery, the low-level error recovery in zfcp could be running and preventing the SCSI midlayer to issue error recovery requests. To avoid unnecessary error recovery escalation, wait for the zfcp erp to finish and retry if necessary. While reworking the SCSI eh handlers, alsa cleanup the code and simplify the interface from zfcp_scsi to the fsf layer. 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>
| * [SCSI] zfcp: Wait for free SBALs when possibleChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | For calls from zfcp erp, scsi_eh and sysfs switch the calls issuing FSF requests to zfcp_fsf_req_sbal_get to wait for free SBALs. 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>
| * [SCSI] zfcp: Only increment req_id for successfully issued requestsChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | Only increment the req_id for successfully issued requests. This avoids some confusion when debugging issued fsf requests. 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>
| * [SCSI] zfcp: Simplify latency lock handlingChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | The lock only needs to protect the softirq context called from qdio against the userspace context called from sysfs. spin_lock and spin_lock_bh is enough. 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>
| * [SCSI] zfcp: add measurement data for average qdio queue utilisationMartin Peschke2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide measurement data for the utilisation of the QDIO outbound queue. The additional value allows to calculate an average queue utilisation by looking at the deltas per time unit. Needed for capacity planning. It is up to user space to handle wrap-arounds of the 64 bit value. The new counter neatly complements the existing counter for queue full conditions. That is why, both statistics counter have been integrated. Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
| * [SCSI] zfcp: Remove UNIT_REGISTERED status flagChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | Use the device pointer in zfcp_unit for tracking if we have a registered SCSI device. With this approach, the flag ZFCP_STATUS_UNIT_REGISTERED is only redundant and can be removed. 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>
| * [SCSI] zfcp: Remove some port flagsChristof Schmitt2009-03-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PORT_PHYS_CLOSING is only set and cleared, but not actually used for status checking. PORT_INVALID_WWPN is set when the GID_PN request does not return a d_id for a remote port, e.g. when a remote port has been unplugged. For this case, the d_id is zero. In the erp we can check the d_id and use the normal escalation procedure that gives up after three retries and remove the special case. PORT_NO_WWPN is unused: Each port in the remote port list has a valid wwpn. The WKA ports are now tracked outside the port list. Remove the PORT_NO_WWPN flag, since this is no longer set for any port. 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>
| * [SCSI] Remove SUGGEST flagsMartin K. Petersen2009-03-12
| | | | | | | | | | | | | | | | | | The SUGGEST_* flags in the SCSI command result have been out of fashion for a while and we don't actually use them in the error handling. Remove the remaining occurrences. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* | Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds2009-03-26
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (81 commits) [S390] remove duplicated #includes [S390] cpumask: use mm_cpumask() wrapper [S390] cpumask: Use accessors code. [S390] cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits. [S390] cpumask: remove cpu_coregroup_map [S390] fix clock comparator save area usage [S390] Add hwcap flag for the etf3 enhancement facility [S390] Ensure that ipl panic notifier is called late. [S390] fix dfp elf hwcap/facility bit detection [S390] smp: perform initial cpu reset before starting a cpu [S390] smp: fix memory leak on __cpu_up [S390] ipl: Improve checking logic and remove switch defaults. [S390] s390dbf: Remove needless check for NULL pointer. [S390] s390dbf: Remove redundant initilizations. [S390] use kzfree() [S390] BUG to BUG_ON changes [S390] zfcpdump: Prevent zcore from beeing built as a kernel module. [S390] Use csum_partial in checksum.h [S390] cleanup lowcore.h [S390] eliminate ipl_device from lowcore ...
| * | [S390] use kzfree()Johannes Weiner2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use kzfree() instead of memset() + kfree(). Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] BUG to BUG_ON changesStoyan Gaydarov2009-03-26
| | | | | | | | | | | | | | | | | | Signed-off-by: Stoyan Gaydarov <stoyboyker@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Use csum_partial in checksum.hFrank Munzert2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | The cksm function in system.h is duplicate to csum_partial in checksum.h. Remove cksm and use csum_partial instead. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] eliminate cpuinfo_S390 structureMartin Schwidefsky2009-03-26
| | | | | | | | | | | | Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] list usage cleanup in s390Eric Sesterhenn2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | Trivial cleanup, list_del(); list_add{,_tail}() is equivalent to list_move{,_tail}(). Semantic patch for coccinelle can be found at www.cccmz.de/~snakebyte/list_move_tail.spatch Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] tape message cleanupCarsten Otte2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | This is a cleanup of all the messages this driver prints. It uses the dev_message macros now. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: merge inbound and outbound handler functionsJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | The inbound and outbound handlers are nearly identical if the outbound handler uses first_to_check as end index instead of last_move. Since both values are identical at that point the handlers can be merged. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: report SIGA errors directlyJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Errors from SIGA instructions are stored in the per queue qdio_error and reported back when the queue handler is called. That opens a race when multiple error conditions occur simultanously. Report SIGA errors immediately in the return value of do_QDIO so the upper layer can react and SIGA errors no longer interfere with other errors. Move the SIGA error handling in qeth from the outbound handler to qeth_flush_buffers. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
| * | [S390] qdio: tasklet termination in case of module unloadJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the qdio module is unloaded the tiqdio tasklet must be terminated by tasklet_kill. Move the tasklet_kill after the unregistration of the adapter interrupt so the tiqdio tasklet will not be scheduled anymore before calling tasklet_kill. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: seperate last move index and polling indexJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The index value that indicated that the input queue moved was also used to store the index of the first acknowledged buffer. For non-qebsm only the newest buffer is acknowledged which may be different from the last move index so two seperate values are needed to track the input queue. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: move ACK to newest buffer for devices without QEBSMJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | The ACKnowledgement state should be set on the newest SBAL so an adapter interrupt surpression check needs to scan fewer SBALs. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: call qdio_free also if qdio_shutdown failsJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | qdio_cleanup is a wrapper function that should call qdio_shutdown and qdio_free. qdio_free was not called if an error occured in qdio_shutdown resulting in a missing free of allocated resources. Call qdio_free regardless of the return value of qdio_shutdown. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: proper kill of qdio taskletsJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The queue tasklets were stopped with tasklet_disable. Although tasklet_disable prevents the tasklet from beeing executed it is still possible that a tasklet is scheduled on a CPU at that point. A following qdio_establish calls tasklet_init which clears the tasklet count and the tasklet state leading to the following Oops: <2>kernel BUG at kernel/softirq.c:392! <4>illegal operation: 0001 [#1] SMP <4>Modules linked in: iptable_filter ip_tables x_tables dm_round_robin dm_multipath scsi_dh sg sd_mod crc_t10dif nfs lockd nfs _acl sunrpc fuse loop dm_mod qeth_l3 ipv6 zfcp qeth scsi_transport_fc qdio scsi_tgt scsi_mod chsc_sch ccwgroup dasd_eckd_mod dasdm od ext3 mbcache jbd <4>Supported: Yes <4>CPU: 0 Not tainted 2.6.27.13-1.1.mz13-default #1 <4>Process blast.LzS_64 (pid: 16445, task: 000000006cc02538, ksp: 000000006cb67998) <4>Krnl PSW : 0704c00180000000 00000000001399f4 (tasklet_action+0xc8/0x1d4) <4> R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3 <4>Krnl GPRS: ffffffff00000030 0000000000000002 0000000000000002 fffffffffffffffe <4> 000000000013aabe 00000000003b6a18 fffffffffffffffd 0000000000000000 <4> 00000000006705a8 000000007d0914a8 000000007d0914b0 000000007fecfd30 <4> 0000000000000000 00000000003b63e8 000000007fecfd90 000000007fecfd30 <4>Krnl Code: 00000000001399e8: b9200021 cgr %r2,%r1 <4> 00000000001399ec: a7740004 brc 7,1399f4 <4> 00000000001399f0: a7f40001 brc 15,1399f2 <4> >00000000001399f4: c0100027e8ee larl %r1,636bd0 <4> 00000000001399fa: bf1f1008 icm %r1,15,8(%r1) <4> 00000000001399fe: a7840019 brc 8,139a30 <4> 0000000000139a02: c0300027e8ef larl %r3,636be0 <4> 0000000000139a08: e3c030000004 lg %r12,0(%r3) <4>Call Trace: <4>([<0000000000139c12>] tasklet_hi_action+0x112/0x1d4) <4> [<000000000013aabe>] __do_softirq+0xde/0x1c4 <4> [<000000000010fa2e>] do_softirq+0x96/0xb0 <4> [<000000000013a8d8>] irq_exit+0x70/0xcc <4> [<000000000010d1d8>] do_extint+0xf0/0x110 <4> [<0000000000113b10>] ext_no_vtime+0x16/0x1a <4> [<000003e0000a3662>] ext3_dirty_inode+0xe6/0xe8 [ext3] <4>([<00000000001f6cf2>] __mark_inode_dirty+0x52/0x1d4) <4> [<000003e0000a44f0>] ext3_ordered_write_end+0x138/0x190 [ext3] <4> [<000000000018d5ec>] generic_perform_write+0x174/0x230 <4> [<0000000000190144>] generic_file_buffered_write+0xb4/0x194 <4> [<0000000000190864>] __generic_file_aio_write_nolock+0x418/0x454 <4> [<0000000000190ee2>] generic_file_aio_write+0x76/0xe4 <4> [<000003e0000a05c2>] ext3_file_write+0x3e/0xc8 [ext3] <4> [<00000000001cc2fe>] do_sync_write+0xd6/0x120 <4> [<00000000001ccfc8>] vfs_write+0xac/0x184 <4> [<00000000001cd218>] SyS_write+0x68/0xe0 <4> [<0000000000113402>] sysc_noemu+0x10/0x16 <4> [<0000020000043188>] 0x20000043188 <4>Last Breaking-Event-Address: <4> [<00000000001399f0>] tasklet_action+0xc4/0x1d4 <6>qdio: 0.0.c61b ZFCP on SC f67 using AI:1 QEBSM:0 PCI:1 TDD:1 SIGA: W AOP <4> <0>Kernel panic - not syncing: Fatal exception in interrupt Use tasklet_kill instead of tasklet_disbale. Since tasklet_schedule must not be called after tasklet_kill use the QDIO_IRQ_STATE_STOPPED to inidicate that a queue is going down and prevent further tasklet schedules in that case. Remove superflous tasklet_schedule from input queue setup, at that time the queues are not ready so the schedule results in a NOP. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: Dont call qdio_shutdown in case qdio_activate failsJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the call to qdio_shutdown from qdio_activate since the upper-layer drivers are responsible to call qdio_shutdown when qdio_activate returns with an error. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] qdio: add missing tiq_list lockingJan Glauber2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a mutex to protect the tiq_list. Although reading the list is done using RCU adding and removing elements from the list must still happen locked since multiple qdio devices may change the list in parallel otherwise. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: prevent workqueue deadlockPeter Oberparleiter2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Subchannel reprobing can block the kslowcrw workqueue indefinitely while waiting for device recognition to finish which is also scheduled to run on kslowcrw. Prevent this deadlock by moving the waiting portion of subchannel reprobing to the cio workqueue. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: remove unused local variableSebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | Remove unused subchannel pointer in io_subchannel_recog_done. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: incorrect status check in interrogate functionPeter Oberparleiter2009-03-26
| | | | | | | | | | | | | | | | | | | | | Fix incorrect check for active I/O in interrogate function. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: fix rc generation after chsc callSebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In some situations a rc in __chsc_do_secm will be overwritten by another one. This shouldn't do harm since todays callers don't check for _specific_ errors but fix it for the sake of correctness. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: fix wrong buffer access in cio_ignore_writeSebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | Writing only spaces to /proc/cio_ignore will cause a buffer overflow since the size_t value i will not become negative and so buf[-1UL] is accessed. Change the value of i to ssize_t. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: ccw group fix unbind behaviour.Sebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: fix sanity checks in ccwgroup driver.Sebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: ccw group online store - report rcs to the caller.Sebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: airq - fix array boundarySebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: device scan oom fallback.Sebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: ensure single load of irq handler pointerHeiko Carstens2009-03-26
| | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio/crw: add/fix lockingHeiko Carstens2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: ccw device online store - report rc from ccw driver.Sebastian Ott2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | [S390] cio: Use ccw_device_set_notoper().Cornelia Huck2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
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