usb: gadget: u_serial.h: increase MAX_U_SERIAL_PORTS to 8

Mediatek's LTE modem needs up to 8 ports to connect to PC for logging
and debugging under some scenarios. Hence we suggest to increase the
definition of MAX_U_SERIAL_PORTS to 8 for some complex embedded systems.

Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Link: https://lore.kernel.org/r/1592286977-30483-1-git-send-email-macpaul.lin@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/function/u_serial.h b/drivers/usb/gadget/function/u_serial.h
index cadb76e..102a732 100644 (file)
--- a/drivers/usb/gadget/function/u_serial.h
+++ b/drivers/usb/gadget/function/u_serial.h
@@ -12,7 +12,7 @@
 #include <linux/usb/composite.h>
 #include <linux/usb/cdc.h>
 
-#define MAX_U_SERIAL_PORTS     4
+#define MAX_U_SERIAL_PORTS     8
 
 struct f_serial_opts {
        struct usb_function_instance func_inst;