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2020-07-08scsi: megaraid: Remove set but unused variableDamien Le Moal
The variable remainder is unused in mega_div64_32(). Remove it to avoid a compiler warning. While at it, also fix the function documentation comments. Link: https://lore.kernel.org/r/20200706123348.451871-1-damien.lemoal@wdc.com Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: megaraid: Fix compilation warningsDamien Le Moal
Move function declarations to megaraid_sas.h to avoid warnings such as: warning: no previous prototype for ‘xxx' No functional changes. Link: https://lore.kernel.org/r/20200706123346.451827-1-damien.lemoal@wdc.com Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: megaraid: Fix kdoc comments formatDamien Le Moal
Fix kernel documentation comments to avoid various warnings when compiling with W=1. No functional changes. Link: https://lore.kernel.org/r/20200706123345.451783-1-damien.lemoal@wdc.com Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: zfcp: Avoid benign overflow of the Request Queue's free-levelJulian Wiedmann
zfcp_qdio_send() and zfcp_qdio_int_req() run concurrently, adding and completing SBALs on the Request Queue. There's a theoretical race where zfcp_qdio_int_req() completes a number of SBALs & increments the queue's free-level _before_ zfcp_qdio_send() was able to decrement it. This can cause ->req_q_free to momentarily hold a value larger than QDIO_MAX_BUFFERS_PER_Q. Luckily zfcp_qdio_send() is always called under ->req_q_lock, and all readers of the free-level also take this lock. So we can trust that zfcp_qdio_send() will clean up such a temporary overflow before anyone can actually observe it. But it's still confusing and annoying to worry about. So adjust the code to avoid this race. Link: https://lore.kernel.org/r/7f61f59a1f8db270312e64644f9173b8f1ac895f.1593780621.git.bblock@linux.ibm.com Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: zfcp: Replace open-coded list moveJulian Wiedmann
Instead of manually moving each element of the unit and port lists into our temporary on-stack lists, splice them over in one go. Link: https://lore.kernel.org/r/cacb179f49ece50fd4dce119c61252d632cdc1d4.1593780621.git.bblock@linux.ibm.com Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: zfcp: Clean up zfcp_erp_action_ready()Julian Wiedmann
We already maintain a pointer to act->adapter. Use it consistently to avoid any confusion about whose ->erp_ready_head and ->erp_ready_wq we are accessing. Link: https://lore.kernel.org/r/d1bb04322f240dee32f4c4a551bc93bc736f4b01.1593780621.git.bblock@linux.ibm.com Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: docs: Remove invalid link and update text for zfcp kernel configBenjamin Block
IBM decided to retire a lot of the content that was previously hosted on "developerworks", and so some of the links we've used for documentation are now dead or redirect to some general landing page with no correlation to what the links were meant to provide. Change the provided link in the Kconfig file for zfcp to rather refer to our device drivers book that we regularly update and publish for free, and whose name hasn't been changed since it was first published. Our hardware is also not called "IBM eServer zSeries" anymore - in fact, it hasn't been called like that since 2006. Use a broader term that covers different server names over time. Lastly, add a short paragraph about how our HBAs are typically named, to have some more tangible references. Link: https://lore.kernel.org/r/96069b9f4c4f056a515b37e89b2bdfccc282e3d3.1593780621.git.bblock@linux.ibm.com Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com> Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: zfcp: Fix an outdated comment for zfcp_qdio_send()Julian Wiedmann
zfcp no longer uses the qdio PCI flag, update the comment. Link: https://lore.kernel.org/r/6717c26fc986bff8776d110e27c199b523684c63.1593780621.git.bblock@linux.ibm.com Fixes: 21ddaa53f92d ("[SCSI] zfcp: Remove PCI flag") Reviewed-by: Steffen Maier <maier@linux.ibm.com> Reviewed-by: Fedor Loshakov <loshakov@linux.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: zfcp: Use prandom_u32_max() for backoffGeorge Spelvin
We don't need crypto-grade random numbers for randomized backoffs. Instead use prandom_u32_max(ep_ro) which generates a pseudo-random number uniformly distributed in the interval [0, ep_ro). Link: https://lore.kernel.org/r/8fc7c4c4069ff1783f4a9ccd84a923f581a09ec5.1593780621.git.bblock@linux.ibm.com Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: George Spelvin <lkml@sdf.org> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: iscsi: Register sysfs for workqueue iscsi_destroyBob Liu
Register sysfs for workqueue iscsi_destroy so that users can set CPU affinity through "cpumask" for this workqueue to get better isolation in cloud multi-tenant scenario. This patch unfolded create_singlethread_workqueue(), added WQ_SYSFS and drop __WQ_ORDERED_EXPLICIT since __WQ_ORDERED_EXPLICIT workqueue isn't allowed to change "cpumask". Link: https://lore.kernel.org/r/20200703051603.1473-1-bob.liu@oracle.com Suggested-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Lee Duncan <lduncan@suse.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Handle short iSIDsMike Christie
SPC4 has: The first ISCSI INITIATOR SESSION ID field byte containing an ASCII null character terminates the ISCSI INITIATOR SESSION ID field without regard for the specified length of the iSCSI TransportID or the contents of the ADDITIONAL LENGTH field. ---------------------------------------- which sounds like we can get an iSID shorter than 12 chars. SPC and the iSCSI RFC do not say how to handle that case other than just cutting off the iSID. This patch just makes sure that if we get an iSID like that, we only copy/send that string. There is no OS that does this right now, so there was no test case. I did test with sg utils to check it works as expected and nothing breaks. Link: https://lore.kernel.org/r/1593654203-12442-8-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Fix iscsi transport id buf len calculationMike Christie
The isid returned to the initiator is in string format which is 12 bytes. We also only add 1 terminating NULL and not one after the initiator name and another one after the isid. Link: https://lore.kernel.org/r/1593654203-12442-7-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Fix iscsi transport id buffer setupMike Christie
This fixes the following bugs with the transport id setup for iscsi: 1. Incorrectly adding NULL after initiator name for TPID format 1. 2. For TPID format 1 buffer setup we are doing off+len, off++ and then also len+=some_value. This results in the isid going past buffer boundaries when we then do buf[off+len] 3. The pr_reg_isid is the isid in string format which is 12 bytes, but we are only copying 6 bytes. Link: https://lore.kernel.org/r/1593654203-12442-6-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Fix iscsi transport id parsingMike Christie
The length passed in the ADDITIONAL LENGTH field includes padding and the terminating NULL for the last field (name or isid depending on the format), so we should not also try to calculate that and then double add that to the returned length. Link: https://lore.kernel.org/r/1593654203-12442-5-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Fix crash during SPEC_I_PT handlingMike Christie
__core_scsi3_add_registration clears the t10_pr_registration pr_reg_deve and does a core_scsi3_lunacl_undepend_item which does an undepend and also does a kref_put from the get done in __core_scsi3_alloc_registration. So when we get to the bottom of core_scsi3_decode_spec_i_port the pr_reg_deve is NULL and we crash when trying to access the local_pr_reg's pr_reg_deve. We've also done an extra undepend for local_pr_reg and if we didn't crash on the NULL we would have done an extra kref_put too. This patch has us do a core_scsi3_lunacl_depend_item for local_pr_reg and then let __core_scsi3_add_registration handle the cleanup for the pr_reg_deve. We then just skip the undepend for the acl and tpg for the local pr_reg. The error path then works in a similar way, but we always do the core_scsi3_lunacl_undepend_item since we never call __core_scsi3_add_registration in that code path. Link: https://lore.kernel.org/r/1593654203-12442-4-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Fix xcopy sess release leakMike Christie
transport_init_session can allocate memory via percpu_ref_init, and target_xcopy_release_pt never frees it. This adds a transport_uninit_session function to handle cleanup of resources allocated in the init function. Link: https://lore.kernel.org/r/1593654203-12442-3-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-08scsi: target: Check enforce_pr_isids during registrationMike Christie
Move the check for enforce_pr_isids to the registration code where we can fail at the time an initiator tries to register a path without an isid. In its current place in __core_scsi3_locate_pr_reg, it is too late because it can be registered and be reported in PR in commands and it is stuck in this state because we cannot unregister it. [mkp: applied by hand] Link: https://lore.kernel.org/r/1593654203-12442-2-git-send-email-michael.christie@oracle.com Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: eesox: Fix different dev_id between request_irq() and free_irq()Christophe JAILLET
The dev_id used in request_irq() and free_irq() should match. Use 'info' in both cases. Link: https://lore.kernel.org/r/20200626040553.944352-1-christophe.jaillet@wanadoo.fr Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: powertec: Fix different dev_id between request_irq() and free_irq()Christophe JAILLET
The dev_id used in request_irq() and free_irq() should match. Use 'info' in both cases. Link: https://lore.kernel.org/r/20200626035948.944148-1-christophe.jaillet@wanadoo.fr Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: scsi_debug: Fix in_use bitmap corruptionDouglas Gilbert
Heavy testing indicates the irqsave() spinlock around the __set_bit() is insufficient to stop following clear_bit() calls being rarely applied out-of-order. Also the nearby failed kzalloc() path leading to SCSI_MLQUEUE_HOST_BUSY does not properly undo the in_use bitmap and num_in_q, fix. Link: https://lore.kernel.org/r/20200702145355.522283-1-dgilbert@interlog.com Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: iscsi: Remove sessdestroylistMike Christie
Just delete the sess from the session list instead of adding it to some list we never use. Link: https://lore.kernel.org/r/1593632868-6808-4-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: iscsi: Optimize work queue flush useMike Christie
There is no need for one session to flush the entire iscsi_eh_timer_workq when removing/unblocking a session. During removal we need to make sure our works are not running anymore. And iscsi_unblock_session only needs to make sure its work is done. The unblock work function will flush/cancel the works it has conflicts with. Link: https://lore.kernel.org/r/1593632868-6808-3-git-send-email-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: iscsi: Delay freeing target_idMike Christie
If we are doing async removal of the session, we could be doing a scsi_remove_target from the removal workqueue, and for the offload case we could be doing a new session addition and scan to the same host. The add/scan might then end up trying to use the target_id of the target we are removing. This patch just has a delay the freeing of the target_id until after the scsi_remove_target has completed, so we know it's no longer in use. Link: https://lore.kernel.org/r/1593632868-6808-2-git-send-email-michael.christie@oracle.com Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: core: Register sysfs for SCSI workqueueBob Liu
Permit scsi_wq_xxx and scsi_tmf_xxx to be bound to different CPUs to get better isolation. Use alloc_workqueue with WQ_SYSFS and drop __WQ_ORDERED_EXPLICIT since a __WQ_ORDERED_EXPLICIT workqueue isn't allowed to change the CPU mask. Link: https://lore.kernel.org/r/20200701030745.16897-2-bob.liu@oracle.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Update lpfc version to 12.8.0.2Dick Kennedy
Update lpfc version to 12.8.0.2 Link: https://lore.kernel.org/r/20200630215001.70793-15-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Add an internal trace log bufferDick Kennedy
The current logging methods typically end up requesting a reproduction with a different logging level set to figure out what happened. This was mainly by design to not clutter the kernel log messages with things that were typically not interesting and the messages themselves could cause other issues. When looking to make a better system, it was seen that in many cases when more data was wanted was when another message, usually at KERN_ERR level, was logged. And in most cases, what the additional logging that was then enabled was typically. Most of these areas fell into the discovery machine. Based on this summary, the following design has been put in place: The driver will maintain an internal log (256 elements of 256 bytes). The "additional logging" messages that are usually enabled in a reproduction will be changed to now log all the time to the internal log. A new logging level is defined - LOG_TRACE_EVENT. When this level is set (it is not by default) and a message marked as KERN_ERR is logged, all the messages in the internal log will be dumped to the kernel log before the KERN_ERR message is logged. There is a timestamp on each message added to the internal log. However, this timestamp is not converted to wall time when logged. The value of the timestamp is solely to give a crude time reference for the messages. Link: https://lore.kernel.org/r/20200630215001.70793-14-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Add blk_io_poll support for latency improvmentDick Kennedy
Although the existing implementation is very good at high I/O load, on tests involving light load, especially on only a few hardware queues, latency was a little higher than it can be due to using workqueue scheduling. Other tasks in the system can delay handling. Change the lower level to use irq_poll by default which uses a softirq for I/O completion. This gives better latency as variance in when the cq is processed is reduced over the workqueue interface. However, as high load is better served by not being in softirq when the CPU is loaded, work queues are still used under high I/O load. Link: https://lore.kernel.org/r/20200630215001.70793-13-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Add support to display if adapter dumps are availableDick Kennedy
Currently, if there has been an issue whereby an adapter dump was taken, there is nothing displayed to hint that it is present. Utilities must be run and they must query for the status in order to then download the dump. Add a message to the driver to query dump image presence when initializing the SLI Port. Link: https://lore.kernel.org/r/20200630215001.70793-12-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Allow applications to issue Common Set Features mailbox commandDick Kennedy
Currently the driver validates command codes received from the application. COMMON_SET_FEATURES is not currently being approved. Add definition of the missing command and allow it to be issued by applications. Link: https://lore.kernel.org/r/20200630215001.70793-11-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix language in 0373 message to reflect non-error messageDick Kennedy
Change vocabulary of 0373 log msg from "error" to "cmpl" The current language of the 0373 message contains the word "error" which caused a number of customers to inquire about the "error" and if it should be a concern. It isn't an error, it's simply an io completion status. Revise the message to replace the word "error" with "cmpl" for completion. Link: https://lore.kernel.org/r/20200630215001.70793-10-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix kdump hang on PPCDick Kennedy
When the kdump kernel shuts down lpfc calls flush_work_queue on an interrupt to schedule the cq handler. When there is only one CPU active on the kdump kernel, it is possible for the work_on to get scheduled on a non-active CPU causing it to never be scheduled. When in the kdump environment, per-CPU affinity of cq's to cpus is not necessary. In those cases, use a general queue_work rather than a queue_work_on(). Link: https://lore.kernel.org/r/20200630215001.70793-9-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix shost refcount mismatch when deleting vportDick Kennedy
When vports are deleted, it is observed that there is memory/kthread leakage as the vport isn't fully being released. There is a shost reference taken in scsi_add_host_dma that is not released during scsi_remove_host. It was noticed that other drivers resolve this by doing a scsi_host_put after calling scsi_remove_host. The vport_delete routine is taking two references one that corresponds to an access to the scsi_host in the vport_delete routine and another that is released after the adapter mailbox command completes that destroys the VPI that corresponds to the vport. Remove one of the references taken such that the second reference that is put will complete the missing scsi_add_host_dma reference and the shost will be terminated. Link: https://lore.kernel.org/r/20200630215001.70793-8-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix stack trace seen while setting rrq activeDick Kennedy
Call traces have been observed running different tests that involve aborts and setting the rrq active flag. The lpfc_set_rrq_active routine is doing a mempool_alloc under the soft_irq processing level. When the mempool needs to get a new buffer from the free pool and has to wait for memory to become free it will check the flags passed in on the alloc and dump the stack if the thread is running in interrupt context. Replace the GFP_KERNEL flag with GFP_ATOMIC so that the memory allocation will not attempt to sleep if there is no mem available. Link: https://lore.kernel.org/r/20200630215001.70793-7-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix oops due to overrun when reading SLI3 dataDick Kennedy
When using DUMP on SLI3 to read VPD and Port status data (config region 23), the adapter is overruning the kmalloc'd buffer causing havoc on other consumers of the allocation pools. Rework the loops processing the dump data and validate/size memory lengths before performing bcopy. Link: https://lore.kernel.org/r/20200630215001.70793-6-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix NVMe rport deregister and registration during ADISCDick Kennedy
During driver unload/reload testing, the NVMe initiator would not re-establish connectivity to NVMe controllers on reload. The failing NVMe array supports concurrent FCP and NVMe operation via different nport_id's. The array was repeatedly sending an ADISC every 2 seconds after PLOGI completed and while NVMe subsystems were executing discovery. The target would continue this state for roughly 45 seconds. The driver's current behavior on ADISC receipt is to validate a the ADISC vs the device and issue a RESUME_RPI to restore transmission. The receipt of the ADISC effectively caused a driver to take actions similar to a logout and login for the remote port, causing the deregistration of the nvme rport and a subsequent re-registration. This caused a constant reset and re-connect of the NVMe controller while this 45s window occurred. There was no need for the state changes as ADISC does not change login state. This patch corrects this behavior by validating if the remoteport is already logged in (MAPPED) and when true, avoids the call to set the ndlp state to MAPPED, which triggers the unreg/re-reg. Thus ADISC does not change the login state of the node. Link: https://lore.kernel.org/r/20200630215001.70793-5-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix missing MDS functionalityDick Kennedy
Visual code inspection of the MDS implementation revealed two errors in the driver: - The set features Feature Code had an incorrect value - The routine that classifies command type for cmd completions was missing the Send Frame definition. Send Frame is used for MDS driver loopback. Link: https://lore.kernel.org/r/20200630215001.70793-3-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-02scsi: lpfc: Fix unused assignment in lpfc_sli4_bsg_link_diag_testDick Kennedy
Coverity reported the following error: Assigned value that is never used may represent unnecessary computation. The rc variable was initially assigned a value but in several cases, when an error case is detected, it is reassigned a new value. The initial value had little use. In code-reviewing this routine, it could use some cleanup: - Setting the initialization value to -ENODEV is a much better choice and lessens code in the routine. - The wasn't tracking logic errors vs no error and mailbox failure. Better to resolve by adding a status to track the mailbox failure and merge it with the logic error when the routine returns. Link: https://lore.kernel.org/r/20200630215001.70793-2-jsmart2021@gmail.com Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-01scsi: qla2xxx: SAN congestion management implementationShyam Sundar
* Firmware Initialization with SCM enabled based on NVRAM setting and firmware support (About Firmware). * Enable PUREX and add support for fabric performance impact notification (FPIN) handling. * Allocate a default PUREX item for each vha to handle memory allocation failures in ISR. Link: https://lore.kernel.org/r/20200630102229.29660-3-njavali@marvell.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: James Smart <james.smart@broadcom.com> Signed-off-by: Shyam Sundar <ssundar@marvell.com> Signed-off-by: Arun Easi <aeasi@marvell.com> Signed-off-by: Nilesh Javali <njavali@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-07-01scsi: qla2xxx: Change in PUREX to handle FPIN ELS requestsShyam Sundar
SAN Congestion Management generates ELS pkts whose size can vary and be > 64 bytes. Change the PUREX handling code to support non-standard ELS pkt size. Link: https://lore.kernel.org/r/20200630102229.29660-2-njavali@marvell.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Shyam Sundar <ssundar@marvell.com> Signed-off-by: Arun Easi <aeasi@marvell.com> Signed-off-by: Nilesh Javali <njavali@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Introduce a function for computing the debug message prefixBart Van Assche
Instead of repeating the code for generating a debug message prefix six times, introduce a function for computing the debug message prefix. Link: https://lore.kernel.org/r/20200629225454.22863-10-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Make qla2x00_restart_isp() easier to readBart Van Assche
Instead of using complicated control flow to only have one return statement at the end of qla2x00_restart_isp(), return an error status as soon as it is known that this function will fail. Link: https://lore.kernel.org/r/20200629225454.22863-9-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Fix a Coverity complaint in qla2100_fw_dump()Bart Van Assche
'cnt' can exceed the size of the risc_ram[] array. Prevent that Coverity complains by rewriting an address calculation expression. This patch fixes the following Coverity complaint: CID 337803 (#1 of 1): Out-of-bounds read (OVERRUN) 109. overrun-local: Overrunning array of 122880 bytes at byte offset 122880 by dereferencing pointer &fw->risc_ram[cnt]. Link: https://lore.kernel.org/r/20200629225454.22863-8-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Make __qla2x00_alloc_iocbs() initialize 32 bits of ↵Bart Van Assche
request_t.handle The request_t 'handle' member is 32-bits wide, hence use wrt_reg_dword(). Change the cast in the wrt_reg_byte() call to make it clear that a regular pointer is casted to an __iomem pointer. Note: 'pkt' points to I/O memory for the qlafx00 adapter family and to coherent memory for all other adapter families. This patch fixes the following Coverity complaint: CID 358864 (#1 of 1): Reliance on integer endianness (INCOMPATIBLE_CAST) incompatible_cast: Pointer &pkt->handle points to an object whose effective type is unsigned int (32 bits, unsigned) but is dereferenced as a narrower unsigned short (16 bits, unsigned). This may lead to unexpected results depending on machine endianness. Link: https://lore.kernel.org/r/20200629225454.22863-7-bvanassche@acm.org Fixes: 8ae6d9c7eb10 ("[SCSI] qla2xxx: Enhancements to support ISPFx00.") Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Remove a superfluous castBart Van Assche
Remove an unnecessary cast because it prevents the compiler to perform type checking. Link: https://lore.kernel.org/r/20200629225454.22863-6-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Shyam Sundar <ssundar@marvell.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Initialize 'n' before using itBart Van Assche
The following code: qla82xx_rom_fast_read(ha, 0, &n) only initializes 'n' if it succeeds. Since 'n' may be reported in a debug message even if no ROM reads succeeded, initialize 'n' to zero. This patch fixes the following sparse warning: qla_nx.c:1218: qla82xx_pinit_from_rom() error: uninitialized symbol 'n'. Link: https://lore.kernel.org/r/20200629225454.22863-5-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Shyam Sundar <ssundar@marvell.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Make qla82xx_flash_wait_write_finish() easier to readBart Van Assche
Return early instead of having a single return statement at the end of this function. This patch fixes the following sparse warning: qla_nx.c:1018: qla82xx_flash_wait_write_finish() error: uninitialized symbol 'val'. Link: https://lore.kernel.org/r/20200629225454.22863-4-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Remove the __packed annotation from struct fcp_hdr and fcp_hdr_leBart Van Assche
Remove the __packed annotation from struct fcp_hdr* because that annotation is not necessary for these data structures. Link: https://lore.kernel.org/r/20200629225454.22863-3-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-30scsi: qla2xxx: Check the size of struct fcp_hdr at compile timeBart Van Assche
Since struct fcp_hdr is used to exchange data with the firmware, check its size at compile time. Link: https://lore.kernel.org/r/20200629225454.22863-2-bvanassche@acm.org Cc: Nilesh Javali <njavali@marvell.com> Cc: Quinn Tran <qutran@marvell.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Cc: Martin Wilck <mwilck@suse.com> Cc: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-29scsi: target: tcmu: Fix crash on ARM during cmd completionBodo Stroesser
If tcmu_handle_completions() has to process a padding shorter than sizeof(struct tcmu_cmd_entry), the current call to tcmu_flush_dcache_range() with sizeof(struct tcmu_cmd_entry) as length param is wrong and causes crashes on e.g. ARM, because tcmu_flush_dcache_range() in this case calls flush_dcache_page(vmalloc_to_page(start)); with start being an invalid address above the end of the vmalloc'ed area. The fix is to use the minimum of remaining ring space and sizeof(struct tcmu_cmd_entry) as the length param. The patch was tested on kernel 4.19.118. See https://bugzilla.kernel.org/show_bug.cgi?id=208045#c10 Link: https://lore.kernel.org/r/20200629093756.8947-1-bstroesser@ts.fujitsu.com Tested-by: JiangYu <lnsyyj@hotmail.com> Acked-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-06-29scsi: ufs: ufs-exynos: Remove an unnecessary NULL checkDan Carpenter
The "head" pointer can't be NULL because it points to an address in the middle of a ufs_hba struct. Looking at this code, probably someone would wonder if the intent was to check whether "hba" is NULL, but "hba" isn't NULL and the check can just be removed. Link: https://lore.kernel.org/r/20200626105133.GF314359@mwanda Acked-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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