diff options
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/w1.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 48da17596d4..0e6ccd46af0 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -59,6 +59,19 @@ static pid_t control_thread; static int control_needs_exit; static DECLARE_COMPLETION(w1_control_complete); +/* stuff for the default family */ +static ssize_t w1_famdefault_read_name(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + return(sprintf(buf, "%s\n", sl->name)); +} +static struct w1_family_ops w1_default_fops = { + .rname = &w1_famdefault_read_name, +}; +static struct w1_family w1_default_family = { + .fops = &w1_default_fops, +}; + static int w1_master_match(struct device *dev, struct device_driver *drv) { return 1; @@ -360,14 +373,16 @@ static int __w1_attach_slave_device(struct w1_slave *sl) return err; } - err = sysfs_create_bin_file(&sl->dev.kobj, &sl->attr_bin); - if (err < 0) { - dev_err(&sl->dev, - "sysfs file creation for [%s] failed. err=%d\n", - sl->dev.bus_id, err); - device_remove_file(&sl->dev, &sl->attr_name); - device_unregister(&sl->dev); - return err; + if ( sl->attr_bin.read ) { + err = sysfs_create_bin_file(&sl->dev.kobj, &sl->attr_bin); + if (err < 0) { + dev_err(&sl->dev, + "sysfs file creation for [%s] failed. err=%d\n", + sl->dev.bus_id, err); + device_remove_file(&sl->dev, &sl->attr_name); + device_unregister(&sl->dev); + return err; + } } list_add_tail(&sl->w1_slave_entry, &sl->master->slist); @@ -403,12 +418,10 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) spin_lock(&w1_flock); f = w1_family_registered(rn->family); if (!f) { - spin_unlock(&w1_flock); + f= &w1_default_family; dev_info(&dev->dev, "Family %x for %02x.%012llx.%02x is not registered.\n", rn->family, rn->family, (unsigned long long)rn->id, rn->crc); - kfree(sl); - return -ENODEV; } __w1_family_get(f); spin_unlock(&w1_flock); @@ -449,7 +462,9 @@ static void w1_slave_detach(struct w1_slave *sl) flush_signals(current); } - sysfs_remove_bin_file (&sl->dev.kobj, &sl->attr_bin); + if ( sl->attr_bin.read ) { + sysfs_remove_bin_file (&sl->dev.kobj, &sl->attr_bin); + } device_remove_file(&sl->dev, &sl->attr_name); device_unregister(&sl->dev); w1_family_put(sl->family); |