These declarations were never implemented, remove them.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230822143338.19120-1-yuehaibing@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This declaration was never implemented, remove it.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230822143338.19120-1-yuehaibing@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

There is no need to check whether shost_priv() returns a non-NULL value, as
the pointer returned is just an offset to the passed in parameter.

While at it replace an open coded shost_priv() instance.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20230822064817.27257-1-jgross@suse.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

John Garry <john.g.garry@oracle.com> says:

This series tidies-up libsas a bit, including:
- delete structure(s) with only one member
- delete structure members which are only ever set
- delete structure members which are never set and code which relies on
  that member being set

This conflicts with the following series:
https://lore.kernel.org/linux-scsi/20230809132249.37948-1-yuehaibing@huawei.com/

Any conflict should be trivial to resolve.

Based on mkp-scsi staging at a18e81d1 ("scsi: ufs: ufs-pci: Add support for QEMU")

Link: https://lore.kernel.org/r/20230815115156.343535-1-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Igor Pylypiv <ipylypiv@google.com> says:

This patch series plumbs libata's request for a result taskfile
(ATA_QCFLAG_RESULT_TF) through libsas to pm80xx LLDD. Other libsas LLDDs
can start using the newly added return_fis_on_success as well, if needed.

For Command Duration Limits policy 0xD (command completes without an
error) libata needs FIS in order to detect the ATA_SENSE bit and read
the Sense Data for Successful NCQ Commands log (0Fh). pm80xx HBAs do
not return FIS on success by default, hence, the driver is updated to
set the RETFIS bit (Return FIS on good completion) when requested by
libsas.

Link: https://lore.kernel.org/r/20230819213040.1101044-1-ipylypiv@google.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ata_task.retry_count is never set, so delete it and the
reference in asd_build_ata_ascb().
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-11-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ata_task.stp_affil_pol is never set, so delete it and the
reference in asd_build_ata_ascb().
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-10-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ata_task.set_affil_pol is never set, so delete it and the
reference in asd_build_ata_ascb().
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-9-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ssp_task.task_prio is never set, so delete it and any
references which depend on it being set (all of them).
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-8-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ssp_task.enable_first_burst is never set, so delete it and
any references.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-7-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ssp_task.retry_count is only ever set, so delete it.

The aic94xx driver also had its own retry_count definition in struct scb
sub-structs, which may have caused a mix-up.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-6-john.g.garry@oracle.comReviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since commit 79855d17 ("libsas: remove task_collector mode"), struct
scsi_core only contains a reference to the shost. struct scsi_core is only
used in sas_ha_struct.core, so delete scsi_core and replace with a
reference to the shost there.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-5-john.g.garry@oracle.comReviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

enum sas_phy_type is used for asd_sas_phy.type, which is only ever set, so
delete this member and the enum.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-4-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

enum sas_class prob would have been useful if function sas_show_class() was
ever implemented, which it wasn't.

enum sas_class is used as asd_sas_port.class and asd_sas_phy.class, which
are only ever set, so delete these members and the enum.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-3-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ha_struct.lldd_module has only ever been set, so remove it.

Struct scsi_host_template already has a reference to the LLD driver
module as to stop the driver being removed unexpectedly.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-2-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The write back throttling (WBT) code checks if REQ_SYNC | REQ_IDLE is set
to determine if a write is O_DIRECT vs buffered. If the bits are not set
then it assumes it's a buffered write and will throttle LIO if we hit
certain metrics. LIO itself is not using the buffer cache and is doing
direct I/O, so this has us set the direct bits so we are not throttled.

When the initiator application is doing direct I/O this can greatly improve
performance. It depends on the backend device but we have seen where the
WBT code is throttling writes to only 20K IOPs with 4K I/Os when the device
can support 100K+.
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230817192902.346791-1-michael.christie@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The lpfc_vmid_host_uuid is not defined as uuid_t and its usage is not the
same as for uuid_t operations (like exporting or importing).  Hence replace
call to uuid_is_null() by respective memchr_inv() without abusing casting.

With that, replace LPFC_COMPRESS_VMID_SIZE with plain number and respective
sizeof() to make code robust to changes in the future, if any.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230818155452.875781-1-andriy.shevchenko@linux.intel.comReviewed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Commit 4fcf812c ("[SCSI] libsas: export sas_alloc_task()") removed
these implementations but not the declarations.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230818124700.49724-1-yuehaibing@huawei.comReviewed-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

There is a long call chain that &fip->ctlr_lock is acquired by isr
fnic_isr_msix_wq_copy() under hard IRQ context. Thus other process context
code acquiring the lock should disable IRQ, otherwise deadlock could happen
if the IRQ preempts the execution while the lock is held in process context
on the same CPU.

[ISR]
fnic_isr_msix_wq_copy()
 -> fnic_wq_copy_cmpl_handler()
 -> fnic_fcpio_cmpl_handler()
 -> fnic_fcpio_flogi_reg_cmpl_handler()
 -> fnic_flush_tx()
 -> fnic_send_frame()
 -> fcoe_ctlr_els_send()
 -> spin_lock_bh(&fip->ctlr_lock)

[Process Context]
1. fcoe_ctlr_timer_work()
 -> fcoe_ctlr_flogi_send()
 -> spin_lock_bh(&fip->ctlr_lock)

2. fcoe_ctlr_recv_work()
 -> fcoe_ctlr_recv_handler()
 -> fcoe_ctlr_recv_els()
 -> fcoe_ctlr_announce()
 -> spin_lock_bh(&fip->ctlr_lock)

3. fcoe_ctlr_recv_work()
 -> fcoe_ctlr_recv_handler()
 -> fcoe_ctlr_recv_els()
 -> fcoe_ctlr_flogi_retry()
 -> spin_lock_bh(&fip->ctlr_lock)

4. -> fcoe_xmit()
 -> fcoe_ctlr_els_send()
 -> spin_lock_bh(&fip->ctlr_lock)

spin_lock_bh() is not enough since fnic_isr_msix_wq_copy() is a
hardirq.

These flaws were found by an experimental static analysis tool I am
developing for irq-related deadlock.

The patch fix the potential deadlocks by spin_lock_irqsave() to disable
hard irq.

Fixes: 794d98e7 ("[SCSI] libfcoe: retry rejected FLOGI to another FCF if possible")
Signed-off-by: Chengfeng Ye <dg573847474@gmail.com>
Link: https://lore.kernel.org/r/20230817074708.7509-1-dg573847474@gmail.comReviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

In the function sli_xmit_bls_rsp64_wqe(), the 'if' and 'else' conditions
evaluates the same expression and give the same output. Also, params->s_id
shall not be equal to U32_MAX. Remove the unused code.

This fixes coccinelle warning such as:
drivers/scsi/elx/libefc_sli/sli4.c:2320:2-4: WARNING: possible
condition with no effect (if == else)
Signed-off-by: Rajeshwar R Shinde <coolrrsh@gmail.com>
Link: https://lore.kernel.org/r/20230817114301.17601-1-coolrrsh@gmail.comReviewed-by: Ram Vegesna <ram.vegesna@broadcom.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

One-element and zero-length arrays are deprecated. So, replace one-element
array in struct fc_rscn_pl_s with flexible-array member.

This results in no differences in binary output.

Link: https://github.com/KSPP/linux/issues/339Signed-off-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/ZN0VTpDBOSVHGayb@workReviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

These declarations are not used anymore, remove them.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230816130842.16684-1-yuehaibing@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

PCI core API pci_dev_id() can be used to get the BDF number for a PCI
device. We don't need to compose it manually. Use pci_dev_id() to simplify
the code a little bit.
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Link: https://lore.kernel.org/r/20230811111310.32364-1-zhengzengkai@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

By default PM80xx HBAs return FIS only when a drive reports an error.
The RETFIS bit forces the controller to populate FIS even when a drive
reports no error.
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20230819213040.1101044-3-ipylypiv@google.comReviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Set return_fis_on_success when libata requests result taskfile.

For Command Duration Limits policy 0xD (command completes without
an error) libata needs FIS in order to detect the ATA_SENSE bit and
read the Sense Data for Successful NCQ Commands log (0Fh).
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20230819213040.1101044-2-ipylypiv@google.comReviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

PCI core API pci_dev_id() can be used to get the BDF number for a PCI
device. We don't need to compose it manually. Use pci_dev_id() to simplify
the code a little bit.
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Link: https://lore.kernel.org/r/20230815025419.3523236-4-zhangjialin11@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

PCI core API pci_dev_id() can be used to get the BDF number for a PCI
device. We don't need to compose it manually. Use pci_dev_id() to simplify
the code a little bit.
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Link: https://lore.kernel.org/r/20230815025419.3523236-3-zhangjialin11@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

PCI core API pci_dev_id() can be used to get the BDF number for a PCI
device. We don't need to compose it mannally. Use pci_dev_id() to simplify
the code a little bit.
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Link: https://lore.kernel.org/r/20230815025419.3523236-2-zhangjialin11@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Convert ufshcd_pltfrm_init() over to use dev_err_probe() to avoid the
following log message on bootup due to an -EPROBE_DEFER return code:

    ufshcd-qcom 1d84000.ufs: Initialization failed

While this line is changed, let's also go ahead and add the error code to
the message as well.
Signed-off-by: Brian Masney <bmasney@redhat.com>
Link: https://lore.kernel.org/r/20230814184352.200531-3-bmasney@redhat.comReviewed-by: "Bao D. Nguyen" <quic_nguyenb@quicinc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Convert ufshcd_variant_hba_init() over to use dev_err_probe() to avoid log
messages like the following on bootup:

    ufshcd-qcom 1d84000.ufs: ufshcd_variant_hba_init: variant qcom init
        failed err -517
Signed-off-by: Brian Masney <bmasney@redhat.com>
Link: https://lore.kernel.org/r/20230814184352.200531-2-bmasney@redhat.comReviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Change scsi_host_lookup() hostnum argument type from unsigned short to
unsigned int to match the type used everywhere else.

Fixes: 6d49f63b ("[SCSI] Make host_no an unsigned int")
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Link: https://lore.kernel.org/r/a02497e7-c12b-ef15-47fc-3f0a0b00ffce@cybernetics.comReviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

To properly manage possible failure of sas_register_ha() in
isci_register_sas_ha(), return its result instead of zero

Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Artem Chernyshev <artem.chernyshev@red-soft.ru>
Link: https://lore.kernel.org/r/20230813202336.240874-1-artem.chernyshev@red-soft.ruReviewed-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This function has no declaration, which causes a warning:

drivers/scsi/gvp11.c:53:6: error: no previous prototype for 'gvp11_setup' [-Werror=missing-prototypes]

Since there is also no caller, just remove the function.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20230810141947.1236730-12-arnd@kernel.orgReviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com> # RISC-V
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The qlogicpti_info() function is only used in this file and should be
static to avoid a warning:

drivers/scsi/qlogicpti.c:846:13: error: no previous prototype for 'qlogicpti_info' [-Werror=missing-prototypes]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20230810141947.1236730-8-arnd@kernel.orgReviewed-by: Jack Wang <jinpu.wang@ionos.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com> # RISC-V
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

I have an Iomega Z100P2 zip drive, but it does not work with my StarTech
PEX1P2 AX99100 PCIe parallel port, which evidently does not support 16-bit
or 32-bit EPP. Currently the only way to tell the PPA driver to use 8-bit
EPP is to write 'mode=3' to /proc/scsi/ppa/*, but the driver doesn't
actually distinguish between the three EPP modes and still tries to use
16-bit or 32-bit EPP. And even if writing to that file did make the driver
use 8-bit EPP, it still wouldn't do me any good because by the time that
file exists, the drive has already failed to initialize.

Add a new parameter /sys/module/ppa/mode to set the transfer mode before
initializing the drive. This parameter replaces the use of
CONFIG_SCSI_IZIP_EPP16 in the PPA driver.

At the same time, default to 8-bit EPP. 16-bit and 32-bit EPP are not
necessary for the drive to function, nor are they part of the IEEE 1284
standard, so the driver should not assume that they are available.
Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Link: https://lore.kernel.org/r/20230807155856.362864-2-alexhenrie24@gmail.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Fix a regression introduced in February 2003 in Linux 2.5.61 by a patch
from Alan Cox titled "fix ppa for new scsi".[1]

Link: https://lore.kernel.org/lkml/E18jn1B-0005gQ-00@the-village.bc.nu/Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Link: https://lore.kernel.org/r/20230807155856.362864-1-alexhenrie24@gmail.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Add __init and __exit for arcmsr_module_{init,exit}().
Signed-off-by: Xiang Yang <xiangyang3@huawei.com>
Link: https://lore.kernel.org/r/20230804022913.1917023-1-xiangyang3@huawei.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

These functions have never been implemented since the beginning of git
history.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230809142107.42756-1-yuehaibing@huawei.comReviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Commit 042ebd29 ("scsi: libsas: kill useless ha_event and do some
cleanup") removed sas_hae_reset() but not its declaration.  Commit
2908d778 ("[SCSI] aic94xx: new driver") declared but never implemented
other functions.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230809132249.37948-1-yuehaibing@huawei.comReviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

To ensure that the PCI based QEMU UFS device properly works with Linux,
register the device ID (0x0013) and vendor ID (0x1b36) of QEMU UFS device.

QEMU UFS will enable testing of the UFS driver inside a virtual machine on
systems without UFS host controller. It can also be used to preemptively
implement and test new features before the real device is created.

The new QEMU UFS device can be found at:

https://lore.kernel.org/qemu-devel/20230727155239.GA979354@fedoraSigned-off-by: Jeuk Kim <jeuk20.kim@samsung.com>
Link: https://lore.kernel.org/r/20230807013726epcms2p1c604cb8e98680aebebb7cc5ab2d580f5@epcms2p1Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>