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2012-02-19[SCSI] libsas: perform sas-transport resets in shost->workq contextDan Williams
Extend the sas transport class to allow transport users to attach extra data to a sas_phy (->hostdata). Use this area in libsas to move resets to workq context in preparation for scheduling ata device resets through libata-eh. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: use libata-eh-reset for sata rediscovery fis transmit failuresDan Williams
Since sata devices can take several seconds to recover the link on reset the 0.5 seconds that libsas currently waits may not be enough. Instead if we are rediscovering a phy that was previously attached to a sata device let libata handle any resets to encourage the device to transmit the initial fis. Once sas_ata_hard_reset() and lldds learn how to honor 'deadline' libsas should stop encountering phys in an intermediate state, until then this will loop until the fis is transmitted or ->attached_sas_addr gets cleared, but in the more likely initial discovery case we keep existing behavior. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: defer SAS_TASK_NEED_DEV_RESET commands to libataDan Williams
lldds use the SAS_TASK_NEED_DEV_RESET interface to request that eh perform a reset. In the sata device case defer the commands that triggered the reset to libata-eh context so it can perform its pre and post reset management. In the sas_ata_post_internal() case the reset request is falling on deaf ears as the sas_task is immediately destroyed without any reset action. Since it is currently a nop, and likely superfluous given the conversion to new-style libata-eh, just drop the request. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: let libata handle command timeoutsDan Williams
libsas-eh if it successfully aborts an ata command will hide the timeout condition (AC_ERR_TIMEOUT) from libata. The command likely completes with the all-zero task->task_status it started with. Instead, interpret a TMF_RESP_FUNC_COMPLETE as the end of the sas_task but keep the scmd around for libata-eh to handle. Tested-by: Andrzej Jakowski <andrzej.jakowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: fix timeout vs completion raceDan Williams
Until we have told the lldd to forget a task a timed out operation can return from the hardware at any time. Since completion frees the task we need to make sure that no tasks run their normal completion handler once eh has decided to manage the task. Similar to ata_scsi_cmd_error_handler() freeze completions to let eh judge the outcome of the race. Task collector mode is problematic because it presents a situation where a task can be timed out and aborted before the lldd has even seen it. For this case we need to guarantee that a task that an lldd has been told to forget does not get queued after the lldd says "never seen it". With sas_scsi_timed_out we achieve this with the ->task_queue_flush mutex, rather than adding more time. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: prevent double completion of scmds from ehDan Williams
We invoke task->task_done() to free the task in the eh case, but at this point we are prepared for scsi_eh_flush_done_q() to finish off the scmd. Introduce sas_end_task() to capture the final response status from the lldd and free the task. Also take the opportunity to kill this warning. drivers/scsi/libsas/sas_scsi_host.c: In function ‘sas_end_task’: drivers/scsi/libsas/sas_scsi_host.c:102:3: warning: case value ‘2’ not in enumerated type ‘enum exec_status’ [-Wswitch] Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: close error handling vs sas_ata_task_done() raceDan Williams
Since sas_ata does not implement ->freeze(), completions for scmds and internal commands can still arrive concurrent with ata_scsi_cmd_error_handler() and sas_ata_post_internal() respectively. By the time either of those is called libata has committed to completing the qc, and the ATA_PFLAG_FROZEN flag tells sas_ata_task_done() it has lost the race. In the sas_ata_post_internal() case we take on the additional responsibility of freeing the sas_task to close the race with sas_ata_task_done() freeing the the task while sas_ata_post_internal() is in the process of invoking ->lldd_abort_task(). Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: kill invocation of scsi_eh_finish_cmd from sas_ata_task_doneDan Williams
Prior to the conversion to the new-style libata-eh sas_ata_task_done() may have been the last opportunity to clean up the scmd, but now libata-eh explicitly handles this case. It also races against sas-eh. If a lldd completes a task after SAS_TASK_STATE_ABORTED is set it could trigger a spurious decrement of shost->host_failed. Current lldds have the band-aid of checking SAS_TASK_STATE_ABORTED before calling ->task_done(), but better to just let the scmds escalate to libata for race free cleanup. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: use ->set_dmamode to notify lldds of NCQ parametersDan Williams
sas_discover_sata() notifies lldds of sata devices twice. Once to allow the 'identify' to be sent, and a second time to allow aic94xx (the only libsas driver that cares about sata_dev.identify) to setup NCQ parameters before the device becomes known to the midlayer. Replace this double notification and intervening 'identify' with an explicit ->lldd_ata_set_dmamode notification. With this change all ata internal commands are issued by libata, so we no longer need sas_issue_ata_cmd(). The data from the identify command only needs to be cached in one location so ata_device.id replaces domain_device.sata_dev.identify. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: prevent domain rediscovery competing with ata error handlingDan Williams
libata error handling provides for a timeout for link recovery. libsas must not rescan for previously known devices in this interval otherwise it may remove a device that is simply waiting for its link to recover. Let libata-eh make the determination of when the link is stable and prevent libsas (host workqueue) from taking action while this determination is pending. Using a mutex (ha->disco_mutex) to flush and disable revalidation while eh is running requires any discovery action that may block on eh be moved to its own context outside the lock. Probing ATA devices explicitly waits on ata-eh and the cache-flush-io issued during device removal may also pend awaiting eh completion. Essentially any rphy add/remove activity needs to run outside the lock. This adds two new cleanup states for sas_unregister_domain_devices() 'allocated-but-not-probed', and 'flagged-for-destruction'. In the 'allocated-but-not-probed' state dev->rphy points to a rphy that is known to have not been through a sas_rphy_add() event. At domain teardown check if this device is still pending probe and cleanup accordingly. Similarly if a device has already been queued for removal then sas_unregister_domain_devices has nothing to do. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: convert dev->gone to flagsDan Williams
In preparation for adding tracking of another device state "destroy". Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: remove ata_port.lock management duties from llddsDan Williams
Each libsas driver (mvsas, pm8001, and isci) has invented a different method for managing the ap->lock. The lock is held by the ata ->queuecommand() path. mvsas drops it prior to acquiring any internal locks which allows it to hold its internal lock across calls to task->task_done(). This capability is important as it is the only way the driver can flush task->task_done() instances to guarantee that it no longer has any in-flight references to a domain_device at ->lldd_dev_gone() time. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: introduce sas_drain_work()Dan Williams
When an lldd invokes ->notify_port_event() it can trigger a chain of libsas events to: 1/ form the port and find the direct attached device 2/ if the attached device is an expander perform domain discovery A call to flush_workqueue() will only flush the initial port formation work. Currently libsas users need to call scsi_flush_work() up to the max depth of chain (which will grow from 2 to 3 when ata discovery is moved to its own discovery event). Instead of open coding multiple calls switch to use drain_workqueue() to flush sas work. drain_workqueue() does not handle new work submitted during the drain so libsas needs a bit of infrastructure to hold off unchained work submissions while a drain is in flight. A lldd ->notify() event is considered 'unchained' while a sas_discover_event() is 'chained'. As Tejun notes: "For now, I think it would be best to add private wrapper in libsas to support deferring unchained work items while draining." Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: convert ha->state to flagsDan Williams
In preparation for adding new states (SAS_HA_DRAINING, SAS_HA_FROZEN), convert ha->state into a set of flags. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: replace event locks with atomic bitopsDan Williams
The locks only served to make sure the pending event bitmask was updated consistently. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: fix leak of dev->sata_dev.identify_[packet_]deviceDan Williams
These are never freed in the nominal path. A domain_device has a different lifetime than a sas_rphy we need a dev->rphy independent way of identifying sata devices. Reviewed-by: Jack Wang <jack_wang@usish.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: fix domain_device leakDan Williams
Arrange for the deallocation of a struct domain_device object when it no longer has: 1/ any children 2/ references by any scsi_targets 3/ references by a lldd The comment about domain_device lifetime in Documentation/scsi/libsas.txt is stale as it appears mainline never had a version of a struct domain_device that was registered as a kobject. We now manage domain_device reference counts on behalf of external agents. Reviewed-by: Jack Wang <jack_wang@usish.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: kill sas_slave_destroyDan Williams
Per commit 3e4ec344 "libata: kill ATA_FLAG_DISABLED" needing to set ATA_DEV_NONE is a holdover from before libsas converted to the "new-style" ata-eh. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libsas: remove unused ata_task_resp fieldsDan Williams
Commit 1e34c838 "[SCSI] libsas: remove spurious sata control register read/write" removed the routines to fake the presence of the sata control registers, now remove the unused data structure fields to kill any remaining confusion. Acked-by: Jack Wang <jack_wang@usish.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] Handle disk devices which can not process medium access commandsMartin K. Petersen
We have experienced several devices which fail in a fashion we do not currently handle gracefully in SCSI. After a failure these devices will respond to the SCSI primary command set (INQUIRY, TEST UNIT READY, etc.) but any command accessing the storage medium will time out. The following patch adds an callback that can be used by upper level drivers to inspect the results of an error handling command. This in turn has been used to implement additional checking in the SCSI disk driver. If a medium access command fails twice but TEST UNIT READY succeeds both times in the subsequent error handling we will offline the device. The maximum number of failed commands required to take a device offline can be tweaked in sysfs. Also add a new error flag to scsi_debug which allows this scenario to be easily reproduced. [jejb: fix up integer parsing to use kstrtouint] Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] mpt2sas: spell "primitive" correctly in function prototypeAndrew Morton
Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: "Nandigama, Nagalakshmi" <Nagalakshmi.Nandigama@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] virtio-scsi: SCSI driver for QEMU based virtual machinesPaolo Bonzini
The virtio-scsi HBA is the basis of an alternative storage stack for QEMU-based virtual machines (including KVM). Compared to virtio-blk it is more scalable, because it supports many LUNs on a single PCI slot), more powerful (it more easily supports passthrough of host devices to the guest) and more easily extensible (new SCSI features implemented by QEMU should not require updating the driver in the guest). Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] hpsa: add some older controllers to the kdump blacklistTomas Henzl
Some other older controllers also do have problems to perform a kdump. Adding controllers to this list means that the driver will signal this non-ability via a resettable flag correctly. The unsupported list was created after a consultation with HP. Signed-off-by: Tomas Henzl <thenzl@redhat.com> Acked-by: Mike Miller <mike.miller@hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] scsi_error: classify some ILLEGAL_REQUEST sense as a permanent ↵Mike Snitzer
TARGET_ERROR Permanent target failures are non-retryable and should be classified as TARGET_ERROR; otherwise dm-multipath will retry an IO request that will always fail at the target. A SCSI command that fails with ILLEGAL_REQUEST sense and Additional sense 0x20, 0x21, 0x24 or 0x26 represents a permanent TARGET_ERROR. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] sd: Make sure provisioning mode is reported correctlyMartin K. Petersen
The provisioning_mode parameter in sysfs did not get updated in the SD_LBP_DISABLE case. Make sure the provisioning mode is always set correctly. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] Ensure discard failure gets treated as a target problemMartin K. Petersen
The error reported up the stack for a discard failure did not clearly indicate that the command was processed and subsequently failed by the target device. Return -EREMOTEIO so multipathing does not classify this condition as a path failure. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] mpt2sas: add missing allocation checkTomas Henzl
The __get_free_pages can fail, so the return value should be checked. Spotted thanks to Stanislaw. Signed-off-by: Tomas Henzl <thenzl@redhat.com> Acked-by: "Nandigama, Nagalakshmi" <Nagalakshmi.Nandigama@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Update driver version to 5.02.00-k14Vikas Chaudhary
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Added ping supportVikas Chaudhary
Added ping support for network connection diagnostics. Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] iscsi_transport: Added Ping supportVikas Chaudhary
Added ping support for iscsi adapter, application can use this interface for diagnostic network connection. Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: added support for host eventVikas Chaudhary
Added support to post kernel host event to application using netlink interface. Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] scsi_transport_iscsi: added support for host eventVikas Chaudhary
Added support to post kernel host event to application using netlink interface. Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Proper detection of firmware abort error code for ISP82xxVikas Chaudhary
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Remove un-necessary print statmentLalit Chandivade
On ROM lock acquiring timeout failure, driver spews lot of warning messages in a for loop, remove the unwanted warning message to reduce kernel messages clutter. Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Modified debug log messages for boot info.Manish Rangankar
In some configurations user may not have boot targets configured. In such cases the debug messages printed out by driver look like some kind of failure happening. However this could be a valid case, so modified the messages to appear as warning messages versus failure messages. Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Fix verify boot idx correctlyLalit Chandivade
qla4xxx_verify_boot_idx can falsely report a DDB to be boot target if ha->pri_ddb_idx and ha->sec_ddb_idx are not initialized correctly. What this could cause is if there is DDB entry in FLash at index 0, then qla4xxx_verify_boot_idx would return wrong result as ha->pri_ddb_idx is not set correctly. Fixed the qla4xxx_get_boot_info to set the ha->pri_ddb_idx and ha->sec_ddb_idx correctly. Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Fix un-necessary delay on invalid DDBLalit Chandivade
Fix the un-necessary wait for completion of a sendtarget on an invalid DDB entry. The state of an invalid DDB entry is 0 (unassigned) This will also avoid the delays during system boot. Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla4xxx: Remove unused codeVikas Chaudhary
This code initially added for FW debugging, we don't need this code now so taking it out. Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libfc: Handle discovery failure during ctlr link downBhanu Prakash Gollapudi
While we wait for GPN_FT response, if the ctlr link goes down, the stack generates a completion for GPN_FT with error FC_EXCH_CLOSED, and reports a discovery error. Discovery is not retried in this case, and rightly so. However, the 'pending' flag stays set, which does not allow subsequent discovery to succeed as GPN_FT will never be issued. Fix it by clearing the pending flag when the discovery fails due to GPN_FT failure. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libfc: Fix panic in fc_exch_recvBhanu Prakash Gollapudi
Adding and removing the host into the zone causes this panic. BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0 IP: [<ffffffffa0491707>] fc_exch_recv+0xc57/0xe70 [libfc] Call Trace: [<ffffffffa050e04b>] bnx2fc_l2_rcv_thread+0x37b/0x430 [bnx2fc] [<ffffffffa050dcd0>] ? bnx2fc_l2_rcv_thread+0x0/0x430 [bnx2fc] [<ffffffff81090886>] kthread+0x96/0xa0 [<ffffffff8100c14a>] child_rip+0xa/0x20 [<ffffffff810907f0>] ? kthread+0x0/0xa0 [<ffffffff8100c140>] ? child_rip+0x0/0x20 During fc_exch_reset, the active exchanges are aborted and the exch is deleted. As part of processing ABTS response, due to 'ep' being NULL, any access to ep in fc_exch_recv_bls() causes this panic. Fixed to access 'ep' only if non-NULL. Reviewed-by: Neerav Parikh <neerav.parikh@intel.com> Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] fcoe: Remove reference counting on 'stuct fcoe_interface'Robert Love
The reference counting was necessary on these instances because it was possible for NPIV ports to be destroyed after the N_Port. A previous patch ensures that all NPIV ports are destroyed before the N_Port making the need to track references on the interface unnecessary. Signed-off-by: Robert Love <robert.w.love@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] fcoe: Do not switch context in vport_delete callbackRobert Love
Currently all port deletion is routed though the FCoE workqueue (fcoe_wq). When fc_remove_host is called on an N_Port (for example, from fcoe_destroy) the vports are queued into a FC Transport workqueue. fc_remove_host flushes that queue and each vport is passed to fcoe's fcoe_vport_destroy, which simply queues the associated fcoe_ports for later deletion. This queue cannot be flushed within the N_Ports destroy path because of circular locking issues. The result is that the NPIV ports are destroyed after the N_Port, which is reverse of how they are created. This quirk causes fcoe to keep references on the fcoe_interface shared by each of these ports (N_Port and NPIV). Changing the ordering such that NPIV ports are destroyed before the N_Port will allow us to remove reference counting on the fcoe_interface instances. This patch simply allows fcoe_vport_destory to destroy NPIV ports without deferring them to a workqueue context. This ensures that when fc_remove_host is called the NPIV ports will be destroyed first before the N_Port and allows reference counting on the fcoe's fcoe_interface to be remove in a later patch. Signed-off-by: Robert Love <robert.w.love@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] fcoe: Rename out_nomod label to out_putmodRobert Love
The label implies that it should be called when there is 'nomod.' I read that to mean that the module reference 'get' failed. However, it's only called when the module reference 'get' succeeded. I think it makes more sense to name the label, 'out_putmod' since it should be called when we need to 'put' the module reference taken in the routine before returning. Signed-off-by: Robert Love <robert.w.love@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] fcoe: Allow exposing FDMI attributes via sysfsNeerav Parikh
Allow FDMI attributes to be exposed via the fc_host class object for the fcoe driver. Signed-off-by: Neerav Parikh <neerav.parikh@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] libfcoe: Don't KERN_ERR on netdev notificationRobert Love
This is more of a debug statement. As a KERN_ERR we generate log entries anytime any netdev goes up or down, so when booting there are notification log entries for all system interfaces including 'lo'. This is too much. Let's just log when necessary. Signed-off-by: Robert Love <robert.w.love@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] isci: T10 DIF supportDave Jiang
This allows the controller to do WRITE_INSERT and READ_STRIP for SAS disks that support protection information. SAS disks must be formatted with protection information to use this feature via sg_format. sg3_utils-1.32 -- sg_format version 1.19 20110730 sg_format usage: sg_format --format --verbose --pinfo /dev/sda Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla2xxx: Avoid invalid request queue dereference for bad response ↵Arun Easi
packets. Signed-off-by: Arun Easi <arun.easi@qlogic.com> Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla2xxx: Stop iteration after first failure in *_id functions.Arun Easi
Signed-off-by: Arun Easi <arun.easi@qlogic.com> Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla2xxx: Fix incorrect register access in qla2x00_start_iocbs().Arun Easi
Signed-off-by: Arun Easi <arun.easi@qlogic.com> Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19[SCSI] qla2xxx: Handle device mapping changes due to device logout.Arun Easi
A device logout sent in the delete path of a fcport would clear the port handle binding inside the firmware. This could lead to queued work items for the fcport, if any, getting incorrect results. This patch fixes the issue by checking for device name changes after a call to get port database. Signed-off-by: Arun Easi <arun.easi@qlogic.com> Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>