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path: root/drivers/scsi/hisi_sas
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2016-07-12hisi_sas: update driver version to 1.5John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-12hisi_sas: fix the inconsistent lock issue reported by CONFIG_PROVE_LOCKINGJohn Garry1-5/+0
It is not necessary to surround call to notify_port_event(, PORTE_BROADCAST_RCVD) by spin_lock_irqsave(), so remove. This was causing a warn, as below: ================================= [ INFO: inconsistent lock state ] 4.4.8+ #12 Not tainted --------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. kworker/u64:1/168 [HC0[0]:SC0[0]:HE1:SE1] takes: (&(&hisi_hba->lock)->rlock){?.....}, at: [<ffffffc00052c708>] alloc_dev_quirk_v2_hw+0x48/0xec {IN-HARDIRQ-W} state was registered at: [<ffffffc0000fc764>] mark_lock+0x19c/0x6a0 [<ffffffc0000fdc14>] __lock_acquire+0xa2c/0x1d00 [<ffffffc0000ff654>] lock_acquire+0x58/0x7c [<ffffffc0008b609c>] _raw_spin_lock_irqsave+0x54/0x6c [<ffffffc00052d3c0>] int_chnl_int_v2_hw+0x1c4/0x248 [<ffffffc0001098e8>] handle_irq_event_percpu+0x9c/0x144 [<ffffffc0001099d4>] handle_irq_event+0x44/0x74 [<ffffffc00010cd68>] handle_fasteoi_irq+0xb4/0x188 [<ffffffc000108ea8>] generic_handle_irq+0x24/0x38 [<ffffffc0001091fc>] __handle_domain_irq+0x60/0xac [<ffffffc00008261c>] gic_handle_irq+0xcc/0x168 [<ffffffc0000855ac>] el1_irq+0x6c/0xe0 [<ffffffc0000f7414>] default_idle_call+0x1c/0x34 [<ffffffc0000f7654>] cpu_startup_entry+0x1d4/0x228 [<ffffffc0008aecd8>] rest_init+0x150/0x160 [<ffffffc000c4b95c>] start_kernel+0x3a4/0x3b8 [<00000000008bb000>] 0x8bb000 irq event stamp: 32661 hardirqs last enabled at (32661): [<ffffffc0008b41a8>] __mutex_unlock_slowpath+0x108/0x18c hardirqs last disabled at (32660): [<ffffffc0008b40e4>] __mutex_unlock_slowpath+0x44/0x18c softirqs last enabled at (25114): [<ffffffc0000bde68>] __do_softirq+0x210/0x27c softirqs last disabled at (25095): [<ffffffc0000be224>] irq_exit+0x9c/0xe8 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&hisi_hba->lock)->rlock); <Interrupt> lock(&(&hisi_hba->lock)->rlock); *** DEADLOCK *** 2 locks held by kworker/u64:1/168: #0: ("%s"shost->work_q_name){++++.+}, at: [<ffffffc0000d2980>] process_one_work+0x134/0x3cc #1: ((&sw->work)#2){+.+.+.}, at: [<ffffffc0000d2980>] process_one_work+0x134/0x3cc stack backtrace: CPU: 4 PID: 168 Comm: kworker/u64:1 Not tainted 4.4.8+ #12 Hardware name: Huawei Technologies Co., Ltd. D03/D03, BIOS 1.12 01/01/1900 Workqueue: scsi_wq_1 sas_discover_domain Call trace: [<ffffffc000089988>] dump_backtrace+0x0/0x114 [<ffffffc000089ab0>] show_stack+0x14/0x1c [<ffffffc00035ac50>] dump_stack+0xb4/0xf0 [<ffffffc0000fc524>] print_usage_bug+0x210/0x2b4 [<ffffffc0000fcbc4>] mark_lock+0x5fc/0x6a0 [<ffffffc0000fd9e8>] __lock_acquire+0x800/0x1d00 [<ffffffc0000ff654>] lock_acquire+0x58/0x7c [<ffffffc0008b5edc>] _raw_spin_lock+0x44/0x58 [<ffffffc00052c708>] alloc_dev_quirk_v2_hw+0x48/0xec [<ffffffc000528214>] hisi_sas_dev_found+0x48/0x1b8 [<ffffffc00051a9b8>] sas_notify_lldd_dev_found+0x34/0xe0 [<ffffffc00051e5e8>] sas_discover_root_expander+0x58/0x128 [<ffffffc00051b38c>] sas_discover_domain+0x4bc/0x564 [<ffffffc0000d29ec>] process_one_work+0x1a0/0x3cc [<ffffffc0000d2d50>] worker_thread+0x138/0x438 [<ffffffc0000d9494>] kthread+0xdc/0xf0 [<ffffffc000085c50>] ret_from_fork+0x10/0x40 Signed-off-by: Wei Xu <xuwei5@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-12hisi_sas: add v2 hw ACPI supportJohn Garry1-25/+43
Add support in v2 hw driver for ACPI. A check on whether an ACPI handle is available for the device is used to decide on whether to use ACPI reset handler or syscon for hw reset. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-05-09libata/libsas: Define ATA_CMD_NCQ_NON_DATAHannes Reinecke1-0/+1
Define the NCQ NON DATA command and update libsas to handle it correctly. Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2016-05-09libsas: enable FPDMA SEND/RECEIVEHannes Reinecke1-0/+2
Update libsas and dependent drivers to handle FPDMA SEND/RECEIVE correctly. Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2016-04-15hisi_sas: add alloc_dev_quirk_v2_hw()John Garry1-0/+30
Add custom version of function to allocate device, alloc_dev_quirk_v2_hw(). For sata devices the device id bit0 should be 0. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: add slot_index_alloc_quirk_v2_hw()John Garry1-0/+28
Add v2 hw custom function slot_index_alloc_quirk_v2_hw(). SAS devices should have IPTT bit0 equal to 1. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: add device and slot alloc hw methodsJohn Garry2-2/+12
Add methods to use HW specific versions of functions to allocate slot and device. HW specific methods are permitted to workaround device id vs IPTT collision issue in v2 hw. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: update driver version to 1.4John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: for v2 hw only set ITCT qw2 for SAS deviceJohn Garry1-5/+6
This patch fixes the ITCT table setup as it should be configured differently for SAS and SATA devices. For SATA disks there is no need to set qw2 (already zeroed). Also, link parameters for Bus inactive limit, max connection time limit, and reject to open limit timers parameters are changed to match global config register, MAX_CON_TIME_LIMIT_TIME, as recommended by hw team. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: add v2 hw support for >4 SATA physJohn Garry1-7/+10
This patch adds support for directly attaching SATA disks to phy 4-8. The problem was that only registers concerned with phy 0-3 were being considered in sata_int_v2_hw(). The issue was not detected previously as the development board only exposed phy 0-3; the new board provides access to 8 phys. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: fix v2 hw multiple SATA disk issueJohn Garry1-3/+1
Intermittently it is found that when multiple SATA disks are directly connected to the host that some disks are not detected. The problem is that all set bitfields in ENT_INT_SRC1 are cleared for all phys in sata_int_v2_hw() - it should clear the set bit for the phy being serviced. Also unnecessary double-write to ENT_INT_SRC1 and ENT_INT_SRC_MSK1 is removed (remaining writes are done at end label). Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15hisi_sas: use device linkrate in MCR for v2 hwJohn Garry1-1/+1
Contrary to the field name, the MCR (max connection rate) in the ITCT should hold the device linkrate (linkrate of the connected phy), and not the max linkrate. This fixes an issue seen where some SATA drives connected through an expander which would not attach. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15scsi: rename SCSI_MAX_{SG, SG_CHAIN}_SEGMENTSMing Lin1-1/+1
Rename SCSI_MAX_SG_SEGMENTS to SG_CHUNK_SIZE, which means the amount we fit into a single scatterlist chunk. Rename SCSI_MAX_SG_CHAIN_SEGMENTS to SG_MAX_SEGMENTS. Will move these 2 generic definitions to scatterlist.h later. Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Bart Van Assche <bart.vanassche@sandisk.com> (for ib_srp changes) Signed-off-by: Ming Lin <ming.l@ssi.samsung.com> Acked-by: Tejun Heo <tj@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-29hisi_sas: update driver version to 1.3John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-29hisi_sas: add hisi_sas_slave_configure()John Garry1-1/+14
In high-datarate aging tests, it is found that the SCSI framework can periodically issue lu resets as some commands timeout. Response TASK SET FULL and SAS_QUEUE_FULL may be returned many times for the same command, causing the timeouts. The SAS_QUEUE_FULL errors come from TRANS_TX_CREDIT_TIMEOUT_ERR, TRANS_TX_CLOSE_NORMAL_ERR, and TRANS_TX_ERR_FRAME_TXED errors. They do not mean that the queue is full in the host, but rather it is equivalent to meaning the queue is full for the sdev. To overcome this, the queue depth for the sdev is reduced to 64 (from 256, set in sas_slave_configure()). Normally error code SAS_QUEUE_FULL will result in the sdev queue depth falling, but it falls too slowly during high-datarate tests and commands timeout before it has fallen to an adequete level from original value. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-29hisi_sas: use slot abort in v2 hwJohn Garry1-3/+12
When TRANS_TX_ERR_FRAME_TXED error occurs in a slot, the command should be re-attempted. This error is equivalent to meaning that the queue is full in the sdev (and not the host). A superflous debug statement is also removed in the slot complete handler. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-29hisi_sas: use slot abort in v1 hwJohn Garry1-0/+13
When TRANS_TX_CREDIT_TIMEOUT_ERR or TRANS_TX_CLOSE_NORMAL_ERR error occur in a slot, the command should be re-attempted. This error is equivalent to meaning that the queue is full in the sdev (and not the host). Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-29hisi_sas: add hisi_sas_slot_abort()John Garry2-0/+44
Add a function to abort a slot (task) in the target device and then cleanup and complete the task. The function is called from work queue context as it cannot be called from the context where it is triggered (interrupt). Flag hisi_sas_slot.abort is added as the flag used in the slot error handler to indicate whether the slot needs to be aborted in the sdev prior to cleanup and finish. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-29hisi_sas: change tmf func complete checkJohn Garry1-1/+1
In hisi_sas_exec_internal_tmf_task(), the check for SAM_STAT_GOOD is replaced with TMF_RESP_FUNC_COMPLETE, which is a genuine tmf response code. SAM_STAT_GOOD and TMF_RESP_FUNC_COMPLETE have the same value, so this is why it worked before. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: update driver version to 1.2John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v1 hw ACPI supportJohn Garry1-24/+43
Add support in v1 hw driver for ACPI. A check on whether an ACPI handle is available for the device is used to decide on whether to use ACPI reset handler or syscon for hw reset. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: use Unified Device Properties APIJohn Garry2-20/+23
The hisi_sas driver is required to support both device tree and ACPI. The scanning of the device properties now uses the Unified Device Properties API, which serves both OF and ACPI. Since syscon is not supported by ACPI, syscon is only used in the driver when device tree is used. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: update driver version to 1.1John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 tmf functionsJohn Garry1-0/+23
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 slot error handlerJohn Garry1-0/+421
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 path to send ATA commandJohn Garry3-0/+174
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 code for itct setup and freeJohn Garry1-0/+92
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 code to send smp commandJohn Garry1-0/+71
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 path to send ssp frameJohn Garry1-0/+185
Include code to prep ssp frame and deliver to hardware. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 cq interrupt handlerJohn Garry1-0/+190
Also include slot_complete_v2_hw handler Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 SATA interrupt handlerJohn Garry1-0/+100
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 channel interrupt handlerJohn Garry1-0/+79
This also includes broadcast handler. Unlike v1 hw, broadcast does not have its own dedicated interrupt. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 phy down handlerJohn Garry1-0/+49
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 int init and phy up handlerJohn Garry1-0/+171
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 phy init codeJohn Garry1-0/+49
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add init_id_frame_v2_hw()John Garry1-0/+40
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 hw initJohn Garry1-0/+288
Add code to initialise the hardware. Support is also added to deal with the "am-max-transmissions" (amt) limitation in hip06 controller #1. This is how many connection requests we can send on the system bus before waiting for a response. Due to chip bus design, controller #1 is limited to 32 amt, while, by design, a controller supports 64. The default value for the nibbles in the relevant registers is 0x40; these need to be programmed with 0x20. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add v2 register definitionsJohn Garry1-0/+237
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add bare v2 hw driverJohn Garry2-1/+49
Just add enough to build and init the module. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: rename some fields in hisi_sas_itctJohn Garry1-12/+1
Since hisi_sas_itct format is different between v1 and v2 hw, give more general names for some fields. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: add hisi_sas_err_record_v1John Garry2-13/+16
Since the error record structure is different for v2 hw, make hisi_sas_err_record opaque and add hisi_sas_err_record_v1. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: reduce max itct entriesJohn Garry1-1/+1
Since v2 hw only supports 2048 itct entries, as opposed to 4096 for v1 hw, set the max itct entries to the lower of the two. It is not anticipated that any device with v1 will ever require to connect > 2048 devices. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: set max commands as configurableJohn Garry3-13/+16
Since v2 hardware permits different numbers of commands to v1, set this as configurable in hisi_sas_hw. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23hisi_sas: relocate DEV_IS_EXPANDERJohn Garry2-4/+4
Relocate DEV_IS_EXPANDER to hisi_sas.h as it will be required for v2 hw support. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-04Merge remote-tracking branch 'mkp-scsi/4.5/scsi-fixes' into fixesJames Bottomley2-7/+4
2016-01-26hisi_sas: fix v1 hw check for slot errorJohn Garry1-6/+3
Completion header bit CMPLT_HDR_RSPNS_XFRD flags whether the response frame is received into host memory, and not whether the response frame has an error. As such, change the decision on whether a slot has an error. Also redundant check on CMPLT_HDR_CMD_CMPLT_MSK is removed. Fixes: 27a3f229 ("hisi_sas: Add cq interrupt handler") Signed-off-by: John Garry <john.garry@huawei.com> Tested-by: Ricardo Salveti <ricardo.salveti@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-01-26hisi_sas: add dependency for HAS_IOMEMJohn Garry1-1/+1
Not every arch has io, so fix build by adding necessary dependency. Signed-off-by: John Garry <john.garry@huawei.com> Suggested-by: Richard Weinberger <richard@nod.at> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-01-26Merge remote-tracking branch 'mkp-scsi/4.5/scsi-fixes' into fixesJames Bottomley1-0/+2
2016-01-20hisi_sas: Restrict SCSI_HISI_SAS to arm64Geert Uytterhoeven1-0/+1
The HiSilicon SAS HBA is available in HiSilicon arm64 SoCs only. Restrict it to arm64, unless compile-testing. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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