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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2015-12-09 20:12:03 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2015-12-19 04:06:21 +0100 |
| commit | 3b91d09c1ca69a69c470efe5fbf346e3e90181d5 (patch) | |
| tree | 8b76b33089e2d7ae8c96e9919da48f217141da25 /include/scsi | |
| parent | Merge remote-tracking branch 'mkp-scsi/4.4/scsi-fixes' into fixes (diff) | |
| download | linux-3b91d09c1ca69a69c470efe5fbf346e3e90181d5.tar.xz linux-3b91d09c1ca69a69c470efe5fbf346e3e90181d5.zip | |
scsi_transport_sas: add is_sas_attached() function
Adds a function designed to be callable any time (regardless of
whether the transport attributes are configured or not) which returns
true if the device is attached over a SAS transport. The design of
this function is that transport specific functions can be embedded
within a
if (is_sas_attached(sdev)) {
...
}
which would be compiled out (and thus eliminate the symbols) if SAS is
not configured.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_transport_sas.h | 9 |
1 files changed, 9 insertions, 0 deletions
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) || |