diff options
Diffstat (limited to 'drivers/w1/w1.c')
| -rw-r--r-- | drivers/w1/w1.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 34ffdc6da4fb..4c89f85edfe6 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -918,7 +918,8 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb u8 triplet_ret = 0; search_bit = 0; - rn = last_rn = 0; + rn = dev->search_id; + last_rn = 0; last_device = 0; last_zero = -1; @@ -989,16 +990,27 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb mutex_unlock(&dev->bus_mutex); if ( (triplet_ret & 0x03) != 0x03 ) { - if ( (desc_bit == last_zero) || (last_zero < 0)) + if ((desc_bit == last_zero) || (last_zero < 0)) { last_device = 1; + dev->search_id = 0; + } else { + dev->search_id = rn; + } desc_bit = last_zero; cb(dev, rn); } if (!last_device && slave_count == dev->max_slave_count && !test_bit(W1_WARN_MAX_COUNT, &dev->flags)) { + /* Only max_slave_count will be scanned in a search, + * but it will start where it left off next search + * until all ids are identified and then it will start + * over. A continued search will report the previous + * last id as the first id (provided it is still on the + * bus). + */ dev_info(&dev->dev, "%s: max_slave_count %d reached, " - "additional sensors ignored\n", __func__, + "will continue next search.\n", __func__, dev->max_slave_count); set_bit(W1_WARN_MAX_COUNT, &dev->flags); } |