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authorJohan Hovold <jhovold@gmail.com>2010-03-17 23:05:57 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-20 13:21:34 -0700
commit231543206452f5c42bace54b5c13dfe5a0313812 (patch)
treecbefc56d6c37f50c895a37c47161ac5733cda24c
parent0f3d5bae2bdacce6c6c1d116809d6b3d50338df7 (diff)
USB: serial: generalise generic read implementation
Add process_read_urb to usb_serial_driver so that a driver can rely on the generic read (and throttle) mechanism but still do device specific processing of incoming data (such as adding tty_flags before pushing to line discipline). The default generic implementation handles sysrq for consoles but otherwise simply pushes to tty. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/serial/generic.c5
-rw-r--r--drivers/usb/serial/usb-serial.c1
-rw-r--r--include/linux/usb/serial.h3
3 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index e16c0b234cc..176f1257b66 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -408,7 +408,7 @@ int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
}
EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urb);
-static void usb_serial_generic_process_read_urb(struct urb *urb)
+void usb_serial_generic_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct tty_struct *tty;
@@ -433,6 +433,7 @@ static void usb_serial_generic_process_read_urb(struct urb *urb)
tty_flip_buffer_push(tty);
tty_kref_put(tty);
}
+EXPORT_SYMBOL_GPL(usb_serial_generic_process_read_urb);
void usb_serial_generic_read_bulk_callback(struct urb *urb)
{
@@ -451,7 +452,7 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
usb_serial_debug_data(debug, &port->dev, __func__,
urb->actual_length, data);
- usb_serial_generic_process_read_urb(urb);
+ port->serial->type->process_read_urb(urb);
/* Throttle the device if requested by tty */
spin_lock_irqsave(&port->lock, flags);
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 538924627eb..1b924425089 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1298,6 +1298,7 @@ static void fixup_generic(struct usb_serial_driver *device)
set_to_generic_if_null(device, write_bulk_callback);
set_to_generic_if_null(device, disconnect);
set_to_generic_if_null(device, release);
+ set_to_generic_if_null(device, process_read_urb);
}
int usb_serial_register(struct usb_serial_driver *driver)
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 53f6dc65e87..ff8872eba3a 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -272,6 +272,8 @@ struct usb_serial_driver {
void (*write_int_callback)(struct urb *urb);
void (*read_bulk_callback)(struct urb *urb);
void (*write_bulk_callback)(struct urb *urb);
+ /* Called by the generic read bulk callback */
+ void (*process_read_urb)(struct urb *urb);
};
#define to_usb_serial_driver(d) \
container_of(d, struct usb_serial_driver, driver)
@@ -323,6 +325,7 @@ extern int usb_serial_generic_register(int debug);
extern void usb_serial_generic_deregister(void);
extern int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
gfp_t mem_flags);
+extern void usb_serial_generic_process_read_urb(struct urb *urb);
extern int usb_serial_handle_sysrq_char(struct tty_struct *tty,
struct usb_serial_port *port,
unsigned int ch);