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| author | Dan Williams <dan.j.williams@intel.com> | 2011-11-18 01:59:54 (GMT) |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-02-29 18:49:36 (GMT) |
| commit | 36a399473902a57218dc493c5a814708a56b73ab (patch) | |
| tree | e64a9f136bbacaded9fdd3d3d39c342953d9be34 /include/scsi | |
| parent | 50824d6c5657ce340e3911171865a8d99fdd8eba (diff) | |
| download | linux-36a399473902a57218dc493c5a814708a56b73ab.tar.xz | |
[SCSI] libsas: poll for ata device readiness after reset
Use ata_wait_after_reset() to poll for link recovery after a reset.
This combined with sas_ha->eh_mutex prevents expander rediscovery from
probing phys in an intermediate state. Local discovery does not have a
mechanism to filter link status changes during this timeout, so it
remains the responsibility of lldds to prevent premature port teardown.
Although once all lldd's support ->lldd_ata_check_ready() that could be
used as a gate to local port teardown.
The signature fis is re-transmitted when the link comes back so we
should be revalidating the ata device class, but that is left to a future
patch.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/libsas.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 18704a2e..2079b18 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -615,6 +615,7 @@ struct sas_domain_function_template { int (*lldd_clear_task_set)(struct domain_device *, u8 *lun); int (*lldd_I_T_nexus_reset)(struct domain_device *); int (*lldd_ata_soft_reset)(struct domain_device *); + int (*lldd_ata_check_ready)(struct domain_device *); void (*lldd_ata_set_dmamode)(struct domain_device *); int (*lldd_lu_reset)(struct domain_device *, u8 *lun); int (*lldd_query_task)(struct sas_task *); |