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scsi: libsas: Set port when ex_phy is added or deleted

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We found that when ex_phy was attached and added to the parent wide port,
ex_phy->port was not set, resulting in sas_unregister_devs_sas_addr() not
calling sas_port_delete_phy() when deleting the phy, and the deleted phy
was still on the parent wide port's phy_list.

When we use sas_port_add_ex_phy() to set ex_phy->port to solve the above
problem, we find that after all the phys of the parent_port are removed and
the number of phy becomes 0, the parent_port will not be set to NULL.  This
causes the freed parent port to be used when attaching a new ex_phy in
sas_ex_add_parent_port().

Use sas_port_add_ex_phy() instead of sas_port_add_phy() to set ex_phy->port
when ex_phy is added to the parent port, and set ex_dev->parent_port to
NULL when the number of phy on the port becomes 0.

Signed-off-by: Xingui Yang <yangxingui@huawei.com>
Link: https://lore.kernel.org/r/20240312141103.31358-4-yangxingui@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xingui Yang 2024-03-12 14:11:02 +00:00 committed by Martin K. Petersen
parent 48032c0be6
commit 7a165a81d5
1 changed files with 5 additions and 2 deletions
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7
drivers/scsi/libsas/sas_expander.c
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@ -45,7 +45,7 @@ static void sas_ex_add_parent_port(struct domain_device *dev, int phy_id)
BUG_ON(sas_port_add(ex->parent_port));
sas_port_mark_backlink(ex->parent_port);
}
sas_port_add_phy(ex->parent_port, ex_phy->phy);
sas_port_add_ex_phy(ex->parent_port, ex_phy);
}
/* ---------- SMP task management ---------- */
@ -1864,9 +1864,12 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent,
if (phy->port) {
sas_port_delete_phy(phy->port, phy->phy);
sas_device_set_phy(found, phy->port);
if (phy->port->num_phys == 0)
if (phy->port->num_phys == 0) {
list_add_tail(&phy->port->del_list,
&parent->port->sas_port_del_list);
if (ex_dev->parent_port == phy->port)
ex_dev->parent_port = NULL;
}
phy->port = NULL;
}
}