diff options
Diffstat (limited to 'drivers/usb/gadget/function/f_printer.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_printer.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c index 64a4112068fc..31eba2a43b1a 100644 --- a/drivers/usb/gadget/function/f_printer.c +++ b/drivers/usb/gadget/function/f_printer.c @@ -51,6 +51,8 @@ #define GET_PORT_STATUS 1 #define SOFT_RESET 2 +#define DEFAULT_Q_LEN 10 /* same as legacy g_printer gadget */ + static int major, minors; static struct class *usb_gadget_class; static DEFINE_IDA(printer_ida); @@ -1363,6 +1365,9 @@ static struct usb_function_instance *gprinter_alloc_inst(void) opts->func_inst.free_func_inst = gprinter_free_inst; ret = &opts->func_inst; + /* Make sure q_len is initialized, otherwise the bound device can't support read/write! */ + opts->q_len = DEFAULT_Q_LEN; + mutex_lock(&printer_ida_lock); if (ida_is_empty(&printer_ida)) { |