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scsi: libsas: Simplify sas_check_eeds()

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In sas_check_eeds() there is an empty branch. We can reverse the test
expression and then remove the empty branch. Also the test expression is a
little bit complex so it deserves an individual function. And make the
continuing prototype lines indented after the opening parenthesis to follow
the standard coding style.

Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20230421093744.1583609-2-yanaijie@huawei.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jason Yan 2023-04-21 17:37:42 +08:00 committed by Martin K. Petersen
parent ac9a78681b
commit e3be011e82
1 changed files with 20 additions and 20 deletions
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36
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)
{
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),