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Code Issues Releases Wiki Activity

USB: serial: drop bogus to_usb_serial_port() checks

Browse source 
The to_usb_serial_port() macro is implemented using container_of() so
there's no need to check for NULL.

Note that neither bus match() or probe() is ever called with a NULL
struct device pointer so the checks weren't just misplaced.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2021-02-08 16:48:06 +01:00
parent c5d1448fa3
commit 1542d1324b
1 changed files with 3 additions and 13 deletions
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16
drivers/usb/serial/bus.c
View file

@ -16,19 +16,13 @@
static int usb_serial_device_match(struct device *dev,
struct device_driver *drv)
{
struct usb_serial_driver *driver;
const struct usb_serial_port *port;
const struct usb_serial_port *port = to_usb_serial_port(dev);
struct usb_serial_driver *driver = to_usb_serial_driver(drv);
/*
* drivers are already assigned to ports in serial_probe so it's
* a simple check here.
*/
port = to_usb_serial_port(dev);
if (!port)
return 0;
driver = to_usb_serial_driver(drv);
if (driver == port->serial->type)
return 1;
@ -37,16 +31,12 @@ static int usb_serial_device_match(struct device *dev,
static int usb_serial_device_probe(struct device *dev)
{
struct usb_serial_port *port = to_usb_serial_port(dev);
struct usb_serial_driver *driver;
struct usb_serial_port *port;
struct device *tty_dev;
int retval = 0;
int minor;
port = to_usb_serial_port(dev);
if (!port)
return -ENODEV;
/* make sure suspend/resume doesn't race against port_probe */
retval = usb_autopm_get_interface(port->serial->interface);
if (retval)