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scsi: libsas: Stop hardcoding SAS address length 

Many times we use 8 for SAS address length, while we already have a macro
for this - SAS_ADDR_SIZE.

Replace instances of this with the macro. However, don't touch the SAS
address array sizes sas.h, as these are defined according to the SAS spec.

Some missing whitespaces are also added, and whitespace indentation
in sas_hash_addr() is also fixed (see sas_hash_addr()).

Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2019-04-12 16:57:52 +08:00 committed by Martin K. Petersen
parent 01d4e3a2fc
commit 7b27c5fe24
3 changed files with 30 additions and 27 deletions
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15
drivers/scsi/libsas/sas_expander.c
View File

@ -1151,7 +1151,7 @@ static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE) &&
phy->routing_attr == SUBTRACTIVE_ROUTING) {
memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
memcpy(sub_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
return 1;
}
@ -1163,7 +1163,7 @@ static int sas_check_level_subtractive_boundary(struct domain_device *dev)
{
struct expander_device *ex = &dev->ex_dev;
struct domain_device *child;
u8 sub_addr[8] = {0, };
u8 sub_addr[SAS_ADDR_SIZE] = {0, };
list_for_each_entry(child, &ex->children, siblings) {
if (child->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
@ -1173,7 +1173,7 @@ static int sas_check_level_subtractive_boundary(struct domain_device *dev)
sas_find_sub_addr(child, sub_addr);
continue;
} else {
u8 s2[8];
u8 s2[SAS_ADDR_SIZE];
if (sas_find_sub_addr(child, s2) &&
(SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
@ -1760,10 +1760,11 @@ static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
res = sas_get_phy_discover(dev, phy_id, disc_resp);
if (res == 0) {
memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8);
memcpy(sas_addr, disc_resp->disc.attached_sas_addr,
SAS_ADDR_SIZE);
*type = to_dev_type(dr);
if (*type == 0)
memset(sas_addr, 0, 8);
memset(sas_addr, 0, SAS_ADDR_SIZE);
}
kfree(disc_resp);
return res;
@ -2027,10 +2028,10 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
struct expander_device *ex = &dev->ex_dev;
struct ex_phy *phy = &ex->ex_phy[phy_id];
enum sas_device_type type = SAS_PHY_UNUSED;
u8 sas_addr[8];
u8 sas_addr[SAS_ADDR_SIZE];
int res;
memset(sas_addr, 0, 8);
memset(sas_addr, 0, SAS_ADDR_SIZE);
res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
switch (res) {
case SMP_RESP_NO_PHY:

36
drivers/scsi/libsas/sas_init.c
View File

@ -87,25 +87,27 @@ EXPORT_SYMBOL_GPL(sas_free_task);
/*------------ SAS addr hash -----------*/
void sas_hash_addr(u8 *hashed, const u8 *sas_addr)
{
const u32 poly = 0x00DB2777;
u32 r = 0;
int i;
const u32 poly = 0x00DB2777;
u32 r = 0;
int i;
for (i = 0; i < 8; i++) {
int b;
for (b = 7; b >= 0; b--) {
r <<= 1;
if ((1 << b) & sas_addr[i]) {
if (!(r & 0x01000000))
r ^= poly;
} else if (r & 0x01000000)
r ^= poly;
}
}
for (i = 0; i < SAS_ADDR_SIZE; i++) {
int b;
hashed[0] = (r >> 16) & 0xFF;
hashed[1] = (r >> 8) & 0xFF ;
hashed[2] = r & 0xFF;
for (b = (SAS_ADDR_SIZE - 1); b >= 0; b--) {
r <<= 1;
if ((1 << b) & sas_addr[i]) {
if (!(r & 0x01000000))
r ^= poly;
} else if (r & 0x01000000) {
r ^= poly;
}
}
}
hashed[0] = (r >> 16) & 0xFF;
hashed[1] = (r >> 8) & 0xFF;
hashed[2] = r & 0xFF;
}
int sas_register_ha(struct sas_ha_struct *sas_ha)

6
include/scsi/libsas.h
View File

@ -245,9 +245,9 @@ static inline struct sas_discovery_event *to_sas_discovery_event(struct work_str
struct sas_discovery {
struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
unsigned long pending;
u8 fanout_sas_addr[8];
u8 eeds_a[8];
u8 eeds_b[8];
u8 fanout_sas_addr[SAS_ADDR_SIZE];
u8 eeds_a[SAS_ADDR_SIZE];
u8 eeds_b[SAS_ADDR_SIZE];
int max_level;
};