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scsi: libsas: Insert PORTE_BROADCAST_RCVD event for resuming host

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If a new disk is inserted through an expander when the host was suspended,
it 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.

Link: https://lore.kernel.org/r/1639999298-244569-8-git-send-email-chenxiang66@hisilicon.com
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2021-12-20 19:21:30 +08:00 committed by Martin K. Petersen
parent 133b688b2d
commit e31e18128e
1 changed files with 29 additions and 0 deletions
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29
drivers/scsi/libsas/sas_init.c
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@ -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)