UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

USB: sierra: do not resume I/O on closing ports 

Use tty-port initialised flag rather than private flag to determine when
port is closing down.

Since the tty-port flag is set prior to dropping DTR/RTS (when HUPCL is
set) this avoid submitting the read urbs when resuming the interface in
dtr_rts() only to immediately kill them again in shutdown().

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2014-05-26 19:23:09 +02:00 committed by Greg Kroah-Hartman
parent 0287d5c5cd
commit c2e45d7047
1 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/usb/serial/sierra.c
View File

@ -316,7 +316,6 @@ struct sierra_port_private {
int dsr_state;
int dcd_state;
int ri_state;
unsigned int opened:1;
};
static int sierra_send_setup(struct usb_serial_port *port)
@ -769,8 +768,11 @@ static void sierra_close(struct usb_serial_port *port)
portdata = usb_get_serial_port_data(port);
/*
* Need to take susp_lock to make sure port is not already being
* resumed, but no need to hold it due to ASYNC_INITIALIZED.
*/
spin_lock_irq(&intfdata->susp_lock);
portdata->opened = 0;
if (--intfdata->open_ports == 0)
serial->interface->needs_remote_wakeup = 0;
spin_unlock_irq(&intfdata->susp_lock);
@ -826,7 +828,6 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
goto err_submit;
spin_lock_irq(&intfdata->susp_lock);
portdata->opened = 1;
if (++intfdata->open_ports == 1)
serial->interface->needs_remote_wakeup = 1;
spin_unlock_irq(&intfdata->susp_lock);
@ -1025,16 +1026,14 @@ static int sierra_resume(struct usb_serial *serial)
{
struct usb_serial_port *port;
struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
struct sierra_port_private *portdata;
int ec = 0;
int i, err;
spin_lock_irq(&intfdata->susp_lock);
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
portdata = usb_get_serial_port_data(port);
if (!portdata || !portdata->opened)
if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
continue;
err = sierra_submit_delayed_urbs(port);