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Merge patch series "scsi: libsas: remove empty branches and code simplification"

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Jason Yan <yanaijie@huawei.com> says:

Three patches to remove two empty branches and a little code simplification.

Link: https://lore.kernel.org/r/20230421093744.1583609-1-yanaijie@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Martin K. Petersen 2023-05-08 07:54:31 -04:00
commit 44fcce6735
1 changed files with 71 additions and 53 deletions
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124
drivers/scsi/libsas/sas_expander.c
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@ -1198,37 +1198,37 @@ static void sas_print_parent_topology_bug(struct domain_device *child,
sas_route_char(child, child_phy));
}
static bool sas_eeds_valid(struct domain_device *parent,
struct domain_device *child)
{
struct sas_discovery *disc = &parent->port->disc;
return (SAS_ADDR(disc->eeds_a) == SAS_ADDR(parent->sas_addr) ||
SAS_ADDR(disc->eeds_a) == SAS_ADDR(child->sas_addr)) &&
(SAS_ADDR(disc->eeds_b) == SAS_ADDR(parent->sas_addr) ||
SAS_ADDR(disc->eeds_b) == SAS_ADDR(child->sas_addr));
}
static int sas_check_eeds(struct domain_device *child,
struct ex_phy *parent_phy,
struct ex_phy *child_phy)
struct ex_phy *parent_phy,
struct ex_phy *child_phy)
{
int res = 0;
struct domain_device *parent = child->parent;
struct sas_discovery *disc = &parent->port->disc;
if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
if (SAS_ADDR(disc->fanout_sas_addr) != 0) {
res = -ENODEV;
pr_warn("edge ex %016llx phy S:%02d <--> edge ex %016llx phy S:%02d, while there is a fanout ex %016llx\n",
SAS_ADDR(parent->sas_addr),
parent_phy->phy_id,
SAS_ADDR(child->sas_addr),
child_phy->phy_id,
SAS_ADDR(parent->port->disc.fanout_sas_addr));
} else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
memcpy(parent->port->disc.eeds_a, parent->sas_addr,
SAS_ADDR_SIZE);
memcpy(parent->port->disc.eeds_b, child->sas_addr,
SAS_ADDR_SIZE);
} else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
SAS_ADDR(parent->sas_addr)) ||
(SAS_ADDR(parent->port->disc.eeds_a) ==
SAS_ADDR(child->sas_addr)))
&&
((SAS_ADDR(parent->port->disc.eeds_b) ==
SAS_ADDR(parent->sas_addr)) ||
(SAS_ADDR(parent->port->disc.eeds_b) ==
SAS_ADDR(child->sas_addr))))
;
else {
SAS_ADDR(disc->fanout_sas_addr));
} else if (SAS_ADDR(disc->eeds_a) == 0) {
memcpy(disc->eeds_a, parent->sas_addr, SAS_ADDR_SIZE);
memcpy(disc->eeds_b, child->sas_addr, SAS_ADDR_SIZE);
} else if (!sas_eeds_valid(parent, child)) {
res = -ENODEV;
pr_warn("edge ex %016llx phy%02d <--> edge ex %016llx phy%02d link forms a third EEDS!\n",
SAS_ADDR(parent->sas_addr),
@ -1240,11 +1240,56 @@ static int sas_check_eeds(struct domain_device *child,
return res;
}
/* Here we spill over 80 columns. It is intentional.
*/
static int sas_check_parent_topology(struct domain_device *child)
static int sas_check_edge_expander_topo(struct domain_device *child,
struct ex_phy *parent_phy)
{
struct expander_device *child_ex = &child->ex_dev;
struct expander_device *parent_ex = &child->parent->ex_dev;
struct ex_phy *child_phy;
child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
child_phy->routing_attr != TABLE_ROUTING)
goto error;
} else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
if (child_phy->routing_attr == SUBTRACTIVE_ROUTING)
return sas_check_eeds(child, parent_phy, child_phy);
else if (child_phy->routing_attr != TABLE_ROUTING)
goto error;
} else if (parent_phy->routing_attr == TABLE_ROUTING) {
if (child_phy->routing_attr != SUBTRACTIVE_ROUTING &&
(child_phy->routing_attr != TABLE_ROUTING ||
!child_ex->t2t_supp || !parent_ex->t2t_supp))
goto error;
}
return 0;
error:
sas_print_parent_topology_bug(child, parent_phy, child_phy);
return -ENODEV;
}
static int sas_check_fanout_expander_topo(struct domain_device *child,
struct ex_phy *parent_phy)
{
struct expander_device *child_ex = &child->ex_dev;
struct ex_phy *child_phy;
child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
if (parent_phy->routing_attr == TABLE_ROUTING &&
child_phy->routing_attr == SUBTRACTIVE_ROUTING)
return 0;
sas_print_parent_topology_bug(child, parent_phy, child_phy);
return -ENODEV;
}
static int sas_check_parent_topology(struct domain_device *child)
{
struct expander_device *parent_ex;
int i;
int res = 0;
@ -1259,7 +1304,6 @@ static int sas_check_parent_topology(struct domain_device *child)
for (i = 0; i < parent_ex->num_phys; i++) {
struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
struct ex_phy *child_phy;
if (parent_phy->phy_state == PHY_VACANT ||
parent_phy->phy_state == PHY_NOT_PRESENT)
@ -1268,40 +1312,14 @@ static int sas_check_parent_topology(struct domain_device *child)
if (!sas_phy_match_dev_addr(child, parent_phy))
continue;
child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
switch (child->parent->dev_type) {
case SAS_EDGE_EXPANDER_DEVICE:
if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
child_phy->routing_attr != TABLE_ROUTING) {
sas_print_parent_topology_bug(child, parent_phy, child_phy);
res = -ENODEV;
}
} else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
res = sas_check_eeds(child, parent_phy, child_phy);
} else if (child_phy->routing_attr != TABLE_ROUTING) {
sas_print_parent_topology_bug(child, parent_phy, child_phy);
res = -ENODEV;
}
} else if (parent_phy->routing_attr == TABLE_ROUTING) {
if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
(child_phy->routing_attr == TABLE_ROUTING &&
child_ex->t2t_supp && parent_ex->t2t_supp)) {
/* All good */;
} else {
sas_print_parent_topology_bug(child, parent_phy, child_phy);
res = -ENODEV;
}
}
if (sas_check_edge_expander_topo(child, parent_phy))
res = -ENODEV;
break;
case SAS_FANOUT_EXPANDER_DEVICE:
if (parent_phy->routing_attr != TABLE_ROUTING ||
child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
sas_print_parent_topology_bug(child, parent_phy, child_phy);
if (sas_check_fanout_expander_topo(child, parent_phy))
res = -ENODEV;
}
break;
default:
break;