diff options
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/serial.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index 4267a9c717b..10cb74d2ad1 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -389,5 +389,20 @@ do { \ printk(KERN_DEBUG "%s: " format "\n", __FILE__, ##arg); \ } while (0) +/* + * Macro for reporting errors in write path to avoid inifinite loop + * when port is used as a console. + */ +#define dev_err_console(usport, fmt, ...) \ +do { \ + static bool __print_once; \ + struct usb_serial_port *__port = (usport); \ + \ + if (!__port->port.console || !__print_once) { \ + __print_once = true; \ + dev_err(&__port->dev, fmt, ##__VA_ARGS__); \ + } \ +} while (0) + #endif /* __LINUX_USB_SERIAL_H */ |