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authorJohn Garry <john.garry@huawei.com>2019-04-12 16:57:52 +0800
committerMartin K. Petersen <martin.petersen@oracle.com>2019-04-15 18:55:00 -0400
commit7b27c5fe247b4288f41551ced5bf458f58dc77b8 (patch)
tree8690506f9060347020a7eff518d654f646e6591c /drivers/scsi/libsas
parent01d4e3a2fc07b269eedeefa1f7c5c7090c442900 (diff)
downloadlinux-7b27c5fe247b4288f41551ced5bf458f58dc77b8.tar.bz2
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>
Diffstat (limited to 'drivers/scsi/libsas')
-rw-r--r--drivers/scsi/libsas/sas_expander.c15
-rw-r--r--drivers/scsi/libsas/sas_init.c40
2 files changed, 29 insertions, 26 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 17b45a0c7bc3..93f297199d4c 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -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:
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 221340ee8651..213c85557bf9 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -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;
-
- 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;
- }
- }
-
- hashed[0] = (r >> 16) & 0xFF;
- hashed[1] = (r >> 8) & 0xFF ;
- hashed[2] = r & 0xFF;
+ const u32 poly = 0x00DB2777;
+ u32 r = 0;
+ int i;
+
+ for (i = 0; i < SAS_ADDR_SIZE; i++) {
+ int b;
+
+ 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)