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ptp: create "pins" together with the rest of attributes

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Let's switch to using device_create_with_groups(), which will allow us to
create "pins" attribute group together with the rest of ptp device
attributes, and before userspace gets notified about ptp device creation.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmitry Torokhov
2017-02-14 10:23:34 -08:00
committed by David S. Miller
parent af59e717d5
commit 85a66e5501
3 changed files with 24 additions and 42 deletions
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39
drivers/ptp/ptp_sysfs.c
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@@ -268,25 +268,14 @@ static ssize_t ptp_pin_store(struct device *dev, struct device_attribute *attr,
return count;
}
int ptp_cleanup_sysfs(struct ptp_clock *ptp)
int ptp_populate_pin_groups(struct ptp_clock *ptp)
{
struct device *dev = ptp->dev;
struct ptp_clock_info *info = ptp->info;
if (info->n_pins) {
sysfs_remove_group(&dev->kobj, &ptp->pin_attr_group);
kfree(ptp->pin_attr);
kfree(ptp->pin_dev_attr);
}
return 0;
}
static int ptp_populate_pins(struct ptp_clock *ptp)
{
struct device *dev = ptp->dev;
struct ptp_clock_info *info = ptp->info;
int err = -ENOMEM, i, n_pins = info->n_pins;
if (!n_pins)
return 0;
ptp->pin_dev_attr = kcalloc(n_pins, sizeof(*ptp->pin_dev_attr),
GFP_KERNEL);
if (!ptp->pin_dev_attr)
@@ -309,28 +298,18 @@ static int ptp_populate_pins(struct ptp_clock *ptp)
ptp->pin_attr_group.name = "pins";
ptp->pin_attr_group.attrs = ptp->pin_attr;
err = sysfs_create_group(&dev->kobj, &ptp->pin_attr_group);
if (err)
goto no_group;
ptp->pin_attr_groups[0] = &ptp->pin_attr_group;
return 0;
no_group:
kfree(ptp->pin_attr);
no_pin_attr:
kfree(ptp->pin_dev_attr);
no_dev_attr:
return err;
}
int ptp_populate_sysfs(struct ptp_clock *ptp)
void ptp_cleanup_pin_groups(struct ptp_clock *ptp)
{
struct ptp_clock_info *info = ptp->info;
int err;
if (info->n_pins) {
err = ptp_populate_pins(ptp);
if (err)
return err;
}
return 0;
kfree(ptp->pin_attr);
kfree(ptp->pin_dev_attr);
}