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| author |   Dan Williams <dan.j.williams@intel.com> | 2012-06-21 23:41:46 -0700 |
|---|---|---|
| committer |   James Bottomley <JBottomley@Parallels.com> | 2012-08-24 13:10:23 +0400 |
| commit | 2fcbdcb4c802fe40d6827dbc365dac90cfe8c0a3 (patch) | |
| tree | d4a583b2477afcf474a4ec226406748d9a327613 /include/linux/libata.h | |
| parent | [SCSI] libata: reset once (diff) | |
| download | linux-dev-2fcbdcb4c802fe40d6827dbc365dac90cfe8c0a3.tar.xz linux-dev-2fcbdcb4c802fe40d6827dbc365dac90cfe8c0a3.zip | |
[SCSI] libata: export ata_port suspend/resume infrastructure for sas
Reuse ata_port_{suspend|resume}_common for sas. This path is chosen
over adding coordination between ata-tranport and sas-transport because
libsas wants to revalidate the domain at resume-time at the host level.
It can not validate links have resumed properly until libata has had a
chance to perform its revalidation, and any sane placing of an ata_port
in the sas-transport model would delay it's resumption until after the
host.
Export the common portion of port suspend/resume (bypass pm_runtime),
and allow sas to perform these operations asynchronously (similar to the
libsas async-ata probe implmentation). Async operation is determined by
having an external, rather than stack based, location for storing the
result of the operation.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jacek Danecki <jacek.danecki@intel.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index 31a2853e9530..cc834e1136b2 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1013,6 +1013,17 @@ extern bool ata_link_offline(struct ata_link *link); #ifdef CONFIG_PM extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); extern void ata_host_resume(struct ata_host *host); +extern int ata_sas_port_async_suspend(struct ata_port *ap, int *async); +extern int ata_sas_port_async_resume(struct ata_port *ap, int *async); +#else +static inline int ata_sas_port_async_suspend(struct ata_port *ap, int *async) +{ + return 0; +} +static inline int ata_sas_port_async_resume(struct ata_port *ap, int *async) +{ + return 0; +} #endif extern int ata_ratelimit(void); extern void ata_msleep(struct ata_port *ap, unsigned int msecs); |