GetLineCoding and SetLineCoding are a cdc-acm thing. It doesn't make
sense to have that in the generic u_serial layer. Moreso, f_acm has its
own port_line_coding in its own struct and it uses that, while the one
in struct gserial is set once upon initialization and then never used.
Also, the initialized never-used values were invalid, with bDataBits
and bCharFormat having each other's value.
Signed-off-by: Tal Shorer <tal.shorer@xxxxxxxxx>
---
drivers/usb/gadget/function/u_serial.c | 22 ++--------------------
drivers/usb/gadget/function/u_serial.h | 3 ---
2 files changed, 2 insertions(+), 23 deletions(-)
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 8d9abf1..654d4a6 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -129,9 +129,6 @@ struct gs_port {
wait_queue_head_t drain_wait; /* wait while writes drain */
bool write_busy;
wait_queue_head_t close_wait;
-
- /* REVISIT this state ... */
- struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
};
static struct portmaster {
@@ -1314,7 +1311,7 @@ static void gserial_console_exit(void)
#endif
static int
-gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding)
+gs_port_alloc(unsigned port_num)
{
struct gs_port *port;
int ret = 0;
@@ -1343,7 +1340,6 @@ gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding)
INIT_LIST_HEAD(&port->write_pool);
port->port_num = port_num;
- port->port_line_coding = *coding;
ports[port_num].port = port;
out:
@@ -1392,18 +1388,12 @@ EXPORT_SYMBOL_GPL(gserial_free_line);
int gserial_alloc_line(unsigned char *line_num)
{
- struct usb_cdc_line_coding coding;
struct device *tty_dev;
int ret;
int port_num;
- coding.dwDTERate = cpu_to_le32(9600);
- coding.bCharFormat = 8;
- coding.bParityType = USB_CDC_NO_PARITY;
- coding.bDataBits = USB_CDC_1_STOP_BITS;
-
for (port_num = 0; port_num < MAX_U_SERIAL_PORTS; port_num++) {
- ret = gs_port_alloc(port_num, &coding);
+ ret = gs_port_alloc(port_num);
if (ret == -EBUSY)
continue;
if (ret)
@@ -1491,11 +1481,6 @@ int gserial_connect(struct gserial *gser, u8 port_num)
gser->ioport = port;
port->port_usb = gser;
- /* REVISIT unclear how best to handle this state...
- * we don't really couple it with the Linux TTY.
- */
- gser->port_line_coding = port->port_line_coding;
-
/* REVISIT if waiting on "carrier detect", signal. */
/* if it's already open, start I/O ... and notify the serial
@@ -1543,9 +1528,6 @@ void gserial_disconnect(struct gserial *gser)
/* tell the TTY glue not to do I/O here any more */
spin_lock_irqsave(&port->port_lock, flags);
- /* REVISIT as above: how best to track this? */
- port->port_line_coding = gser->port_line_coding;
-
port->port_usb = NULL;
gser->ioport = NULL;
if (port->port.count > 0 || port->openclose) {
diff --git a/drivers/usb/gadget/function/u_serial.h b/drivers/usb/gadget/function/u_serial.h
index 8d0901e..0549efe 100644
--- a/drivers/usb/gadget/function/u_serial.h
+++ b/drivers/usb/gadget/function/u_serial.h
@@ -44,9 +44,6 @@ struct gserial {
struct usb_ep *in;
struct usb_ep *out;
- /* REVISIT avoid this CDC-ACM support harder ... */
- struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
-
/* notification callbacks */
void (*connect)(struct gserial *p);
void (*disconnect)(struct gserial *p);
--
2.7.4
--
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