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ledtrig-usbdev: use upstream function for iterating USB devices

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This will allow us to drop LEDE patch adding usb_find_device_by_name.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
This commit is contained in:
Rafał Miłecki 2016-07-18 17:59:27 +02:00 committed by Felix Fietkau
parent e633a1b48f
commit 5ea8756766
1 changed files with 27 additions and 5 deletions
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32
target/linux/generic/files/drivers/leds/ledtrig-usbdev.c
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@ -83,6 +83,26 @@ static ssize_t usbdev_trig_name_show(struct device *dev,
return strlen(buf) + 1;
}
struct usbdev_trig_match {
char *device_name;
struct usb_device *usb_dev;
};
static int usbdev_trig_find_usb_dev(struct usb_device *usb_dev, void *data)
{
struct usbdev_trig_match *match = data;
if (WARN_ON(match->usb_dev))
return 0;
if (!strcmp(dev_name(&usb_dev->dev), match->device_name)) {
dev_dbg(&usb_dev->dev, "matched this device!\n");
match->usb_dev = usb_get_dev(usb_dev);
}
return 0;
}
static ssize_t usbdev_trig_name_store(struct device *dev,
struct device_attribute *attr,
const char *buf,
@ -101,16 +121,18 @@ static ssize_t usbdev_trig_name_store(struct device *dev,
td->device_name[size - 1] = 0;
if (td->device_name[0] != 0) {
struct usb_device *usb_dev;
struct usbdev_trig_match match = {
.device_name = td->device_name,
};
/* check for existing device to update from */
usb_dev = usb_find_device_by_name(td->device_name);
if (usb_dev) {
usb_for_each_dev(&match, usbdev_trig_find_usb_dev);
if (match.usb_dev) {
if (td->usb_dev)
usb_put_dev(td->usb_dev);
td->usb_dev = usb_dev;
td->last_urbnum = atomic_read(&usb_dev->urbnum);
td->usb_dev = match.usb_dev;
td->last_urbnum = atomic_read(&match.usb_dev->urbnum);
}
/* updates LEDs, may start timers */