| Message ID | 1637117108-230103-8-git-send-email-chenxiang66@hisilicon.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add runtime PM support for libsas | expand |
Please consider these points: About "Send event PORTE_BROADCAST_RCVD for valid ports": Maybe say "Insert PORTE_BROADCAST_RCVD event for resuming host", as "valid ports" is a little vague. And the point is that we can to rescan when we resume. On 17/11/2021 02:45, chenxiang wrote: > From: Xiang Chen<chenxiang66@hisilicon.com> > > If inserting a new disk for expander, the disk will not be revalidated > as the topology is not re-scanned during the resume process. So send event > PORTE_BROADCAST_RCVD to identify some new inserted disks for expander. If a new disk is inserted through an expander when the host was suspended, they will not necessarily be detected as the topology is not re-scanned during resume. To detect possible changes in topology during suspension, insert a PORTE_BROADCAST_RCVD event per port when resuming to trigger a revalidation. > > Signed-off-by: Xiang Chen<chenxiang66@hisilicon.com> > Reviewed-by: John Garry<john.garry@huawei.com>
在 2021/12/13 19:02, John Garry 写道: > Please consider these points: > > About "Send event PORTE_BROADCAST_RCVD for valid ports": > > Maybe say "Insert PORTE_BROADCAST_RCVD event for resuming host", as > "valid ports" is a little vague. And the point is that we can to > rescan when we resume. ok > > On 17/11/2021 02:45, chenxiang wrote: >> From: Xiang Chen<chenxiang66@hisilicon.com> >> >> If inserting a new disk for expander, the disk will not be revalidated >> as the topology is not re-scanned during the resume process. So send >> event >> PORTE_BROADCAST_RCVD to identify some new inserted disks for expander. > > If a new disk is inserted through an expander when the host was > suspended, they will not necessarily be detected as the topology is > not re-scanned during resume. > > To detect possible changes in topology during suspension, insert a > PORTE_BROADCAST_RCVD event per port when resuming to trigger a > revalidation. Thanks, i will change it in next version. > >> >> Signed-off-by: Xiang Chen<chenxiang66@hisilicon.com> >> Reviewed-by: John Garry<john.garry@huawei.com> > > > . >
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index 43509d139241..974c4a305ece 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -387,6 +387,30 @@ static int phys_suspended(struct sas_ha_struct *ha) return rc; } +static void sas_resume_insert_broadcast_ha(struct sas_ha_struct *ha) +{ + int i; + + for (i = 0; i < ha->num_phys; i++) { + struct asd_sas_port *port = ha->sas_port[i]; + struct domain_device *dev = port->port_dev; + + if (dev && dev_is_expander(dev->dev_type)) { + struct asd_sas_phy *first_phy; + + spin_lock(&port->phy_list_lock); + first_phy = list_first_entry_or_null( + &port->phy_list, struct asd_sas_phy, + port_phy_el); + spin_unlock(&port->phy_list_lock); + + if (first_phy) + sas_notify_port_event(first_phy, + PORTE_BROADCAST_RCVD, GFP_KERNEL); + } + } +} + static void _sas_resume_ha(struct sas_ha_struct *ha, bool drain) { const unsigned long tmo = msecs_to_jiffies(25000); @@ -419,6 +443,11 @@ static void _sas_resume_ha(struct sas_ha_struct *ha, bool drain) scsi_unblock_requests(ha->core.shost); if (drain) sas_drain_work(ha); + + /* send event PORTE_BROADCAST_RCVD to identify some new inserted + * disks for expander + */ + sas_resume_insert_broadcast_ha(ha); } void sas_resume_ha(struct sas_ha_struct *ha)