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    Subject[PATCH v5 2/8] scsi: libsas: introduce sas_find_attached_phy_id() helper
    Date
    LLDDs are implementing their own attached phy id finding code repeatedly.
    Factor it out to libsas.

    Signed-off-by: Jason Yan <yanaijie@huawei.com>
    Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
    Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
    Reviewed-by: John Garry <john.garry@huawei.com>
    ---
    drivers/scsi/libsas/sas_expander.c | 16 ++++++++++++++++
    include/scsi/libsas.h | 2 ++
    2 files changed, 18 insertions(+)

    diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
    index fa2209080cc2..2caf366b9f74 100644
    --- a/drivers/scsi/libsas/sas_expander.c
    +++ b/drivers/scsi/libsas/sas_expander.c
    @@ -2107,6 +2107,22 @@ int sas_ex_revalidate_domain(struct domain_device *port_dev)
    return res;
    }

    +int sas_find_attached_phy_id(struct expander_device *ex_dev,
    + struct domain_device *dev)
    +{
    + struct ex_phy *phy;
    + int phy_id;
    +
    + for (phy_id = 0; phy_id < ex_dev->num_phys; phy_id++) {
    + phy = &ex_dev->ex_phy[phy_id];
    + if (sas_phy_match_dev_addr(dev, phy))
    + return phy_id;
    + }
    +
    + return -ENODEV;
    +}
    +EXPORT_SYMBOL_GPL(sas_find_attached_phy_id);
    +
    void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
    struct sas_rphy *rphy)
    {
    diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
    index 2dbead74a2af..ec08008b919c 100644
    --- a/include/scsi/libsas.h
    +++ b/include/scsi/libsas.h
    @@ -750,6 +750,8 @@ int sas_clear_task_set(struct domain_device *dev, u8 *lun);
    int sas_lu_reset(struct domain_device *dev, u8 *lun);
    int sas_query_task(struct sas_task *task, u16 tag);
    int sas_abort_task(struct sas_task *task, u16 tag);
    +int sas_find_attached_phy_id(struct expander_device *ex_dev,
    + struct domain_device *dev);

    void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
    gfp_t gfp_flags);
    --
    2.31.1
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