From e6bbcef0211ed75db1ca3017551a584aed4e00be Mon Sep 17 00:00:00 2001 From: =?utf8?q?Bj=C3=B8rn=20Mork?= Date: Sun, 13 May 2012 12:34:59 +0200 Subject: [PATCH] USB: let both new_id and remove_id show dynamic id list MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This enables the current list of dynamic IDs to be read out through either new_id or remove_id. Signed-off-by: Bjørn Mork Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-bus-usb | 15 +++++++++++++++ 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 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) { -- 2.20.1