diff options
| author | Bjørn Mork <bjorn@mork.no> | 2012-05-13 12:34:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-14 09:30:40 -0700 |
| commit | e6bbcef0211ed75db1ca3017551a584aed4e00be (patch) | |
| tree | 67143d849f6338e2398fad06b2ca9a97534608da | |
| parent | 581791f5c7a480b2cc3431af9a6e799ffd51eb5e (diff) | |
USB: let both new_id and remove_id show dynamic id list
This enables the current list of dynamic IDs to be read out through
either new_id or remove_id.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 15 | ||||
| -rw-r--r-- | drivers/usb/core/driver.c | 21 |
2 files changed, 34 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index 7c22a532fdfb..6ae9fec8e07d 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -135,6 +135,17 @@ Description: for the device and attempt to bind to it. For example: # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id + Reading from this file will list all dynamically added + device IDs in the same format, with one entry per + line. For example: + # cat /sys/bus/usb/drivers/foo/new_id + 8086 10f5 + dead beef 06 + f00d cafe + + The list will be truncated at PAGE_SIZE bytes due to + sysfs restrictions. + What: /sys/bus/usb-serial/drivers/.../new_id Date: October 2011 Contact: linux-usb@vger.kernel.org @@ -157,6 +168,10 @@ Description: match the driver to the device. For example: # echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id + Reading from this file will list the dynamically added + device IDs, exactly like reading from the entry + "/sys/bus/usb/drivers/.../new_id" + What: /sys/bus/usb/device/.../avoid_reset_quirk Date: December 2009 Contact: Oliver Neukum <oliver@neukum.org> diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 112a7ae5095c..69919b257775 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -79,6 +79,23 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids, } EXPORT_SYMBOL_GPL(usb_store_new_id); +static ssize_t show_dynids(struct device_driver *driver, char *buf) +{ + struct usb_dynid *dynid; + struct usb_driver *usb_drv = to_usb_driver(driver); + size_t count = 0; + + list_for_each_entry(dynid, &usb_drv->dynids.list, node) + if (dynid->id.bInterfaceClass != 0) + count += scnprintf(&buf[count], PAGE_SIZE - count, "%04x %04x %02x\n", + dynid->id.idVendor, dynid->id.idProduct, + dynid->id.bInterfaceClass); + else + count += scnprintf(&buf[count], PAGE_SIZE - count, "%04x %04x\n", + dynid->id.idVendor, dynid->id.idProduct); + return count; +} + static ssize_t store_new_id(struct device_driver *driver, const char *buf, size_t count) { @@ -86,7 +103,7 @@ static ssize_t store_new_id(struct device_driver *driver, return usb_store_new_id(&usb_drv->dynids, driver, buf, count); } -static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); +static DRIVER_ATTR(new_id, S_IRUGO | S_IWUSR, show_dynids, store_new_id); /** * store_remove_id - remove a USB device ID from this driver @@ -127,7 +144,7 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count) return retval; return count; } -static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); +static DRIVER_ATTR(remove_id, S_IRUGO | S_IWUSR, show_dynids, store_remove_id); static int usb_create_newid_files(struct usb_driver *usb_drv) { |