diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 30d26e345dcc..b17f763a73b2 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -340,6 +340,22 @@ static int do_sas_phy_delete(struct device *dev, void *data) return 0; } +/** + * is_sas_attached - check if device is SAS attached + * @sdev: scsi device to check + * + * returns true if the device is SAS attached + */ +int is_sas_attached(struct scsi_device *sdev) +{ + struct Scsi_Host *shost = sdev->host; + + return shost->transportt->host_attrs.ac.class == + &sas_host_class.class; +} +EXPORT_SYMBOL(is_sas_attached); + + /** * sas_remove_children - tear down a devices SAS data structures * @dev: device belonging to the sas object diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 0bd71e2702e3..a8fdd10fc9c5 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -10,6 +10,15 @@ struct scsi_transport_template; struct sas_rphy; struct request; +#if !IS_ENABLED(CONFIG_SCSI_SAS_ATTRS) +static inline int is_sas_attached(struct scsi_device *sdev) +{ + return 0; +} +#else +extern int is_sas_attached(struct scsi_device *sdev); +#endif + static inline int sas_protocol_ata(enum sas_protocol proto) { return ((proto & SAS_PROTOCOL_SATA) ||