[PATCH 8/30] W1: recode w1_slave_found logic

Evgeniy Polyakov
2008-07-11T13:56:41Z

Simplified the logic in w1_slave_found by using the new
w1_attach_slave_device function to find a slave and mark it as active
or add the device if the crc checks.

Signed-off-by: David Fries <david@fries.net>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>

---
drivers/w1/w1.c | 26 ++++++--------------------
1 files changed, 6 insertions(+), 20 deletions(-)

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 24312e0..4bf2001 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -836,9 +836,7 @@ void w1_reconnect_slaves(struct w1_family *f, int attach)

static void w1_slave_found(struct w1_master *dev, u64 rn)
{
- int slave_count;
struct w1_slave *sl;
- struct list_head *ent;
struct w1_reg_num *tmp;
u64 rn_le = cpu_to_le64(rn);

@@ -846,24 +844,12 @@ static void w1_slave_found(struct w1_master *dev, u64 rn)

tmp = (struct w1_reg_num *) &rn;

- slave_count = 0;
- list_for_each(ent, &dev->slist) {
-
- sl = list_entry(ent, struct w1_slave, w1_slave_entry);
-
- if (sl->reg_num.family == tmp->family &&
- sl->reg_num.id == tmp->id &&
- sl->reg_num.crc == tmp->crc) {
- set_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags);
- break;
- }
-
- slave_count++;
- }
-
- if (slave_count == dev->slave_count &&
- rn && ((rn >> 56) & 0xff) == w1_calc_crc8((u8 *)&rn_le, 7)) {
- w1_attach_slave_device(dev, tmp);
+ sl = w1_slave_search_device(dev, tmp);
+ if (sl) {
+ set_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags);
+ } else {
+ if (rn && tmp->crc == w1_calc_crc8((u8 *)&rn_le, 7))
+ w1_attach_slave_device(dev, tmp);
}

atomic_dec(&dev->refcnt);
--
1.4.4.4