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authorJiri Slaby <jslaby@suse.cz>2013-01-03 15:53:06 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-16 07:30:15 +0100
commit2e124b4a390ca85325fae75764bef92f0547fa25 (patch)
tree5519fbcdbe954e79b271ea6d31ac5a4dc754c4f5 /drivers/usb/serial/usb_wwan.c
parentTTY: move low_latency to tty_port (diff)
downloadlinux-2e124b4a390ca85325fae75764bef92f0547fa25.tar.xz
linux-2e124b4a390ca85325fae75764bef92f0547fa25.zip
TTY: switch tty_flip_buffer_push
Now, we start converting tty buffer functions to actually use tty_port. This will allow us to get rid of the need of tty in many call sites. Only tty_port will needed and hence no more tty_port_tty_get in those paths. Now, the one where most of tty_port_tty_get gets removed: tty_flip_buffer_push. IOW we also closed all the races in drivers not using tty_port_tty_get at all yet. Also we move tty_flip_buffer_push declaration from include/linux/tty.h to include/linux/tty_flip.h to all others while we are changing it anyway. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial/usb_wwan.c')
-rw-r--r--drivers/usb/serial/usb_wwan.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 293b460030cb..a547c91e3c05 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -275,7 +275,6 @@ static void usb_wwan_indat_callback(struct urb *urb)
int err;
int endpoint;
struct usb_serial_port *port;
- struct tty_struct *tty;
struct device *dev;
unsigned char *data = urb->transfer_buffer;
int status = urb->status;
@@ -288,16 +287,12 @@ static void usb_wwan_indat_callback(struct urb *urb)
dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n",
__func__, status, endpoint);
} else {
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- if (urb->actual_length) {
- tty_insert_flip_string(&port->port, data,
- urb->actual_length);
- tty_flip_buffer_push(tty);
- } else
- dev_dbg(dev, "%s: empty read urb received\n", __func__);
- tty_kref_put(tty);
- }
+ if (urb->actual_length) {
+ tty_insert_flip_string(&port->port, data,
+ urb->actual_length);
+ tty_flip_buffer_push(&port->port);
+ } else
+ dev_dbg(dev, "%s: empty read urb received\n", __func__);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);