diff options
| author | Johan Hovold <johan@kernel.org> | 2015-02-18 04:34:52 +0100 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2015-02-26 17:12:46 +0100 |
| commit | 2deb96b5d4bb20a33bfaf80e30f38f3433653054 (patch) | |
| tree | d02b859829f986671780463141d4d227f991fbf3 /drivers/usb/serial/bus.c | |
| parent | USB: serial: fix tty-device error handling at probe (diff) | |
| download | linux-2deb96b5d4bb20a33bfaf80e30f38f3433653054.tar.xz linux-2deb96b5d4bb20a33bfaf80e30f38f3433653054.zip | |
USB: serial: fix port attribute-creation race
Fix attribute-creation race with userspace by using the port device
groups field to create the port attributes.
Also use %u when printing the port number, which is unsigned, even
though we do not currently support more than 128 ports per device.
Reported-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <greg@kroah.com>
Diffstat (limited to 'drivers/usb/serial/bus.c')
| -rw-r--r-- | drivers/usb/serial/bus.c | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c index 6f91eb9ae81a..b53a28692226 100644 --- a/drivers/usb/serial/bus.c +++ b/drivers/usb/serial/bus.c @@ -38,15 +38,6 @@ static int usb_serial_device_match(struct device *dev, return 0; } -static ssize_t port_number_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct usb_serial_port *port = to_usb_serial_port(dev); - - return sprintf(buf, "%d\n", port->port_number); -} -static DEVICE_ATTR_RO(port_number); - static int usb_serial_device_probe(struct device *dev) { struct usb_serial_driver *driver; @@ -73,18 +64,10 @@ static int usb_serial_device_probe(struct device *dev) goto exit_with_autopm; } - retval = device_create_file(dev, &dev_attr_port_number); - if (retval) { - if (driver->port_remove) - driver->port_remove(port); - goto exit_with_autopm; - } - minor = port->minor; tty_dev = tty_register_device(usb_serial_tty_driver, minor, dev); if (IS_ERR(tty_dev)) { retval = PTR_ERR(tty_dev); - device_remove_file(dev, &dev_attr_port_number); if (driver->port_remove) driver->port_remove(port); goto exit_with_autopm; @@ -123,8 +106,6 @@ static int usb_serial_device_remove(struct device *dev) minor = port->minor; tty_unregister_device(usb_serial_tty_driver, minor); - device_remove_file(&port->dev, &dev_attr_port_number); - driver = port->serial->type; if (driver->port_remove) retval = driver->port_remove(port); |