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authorAlan Stern <stern@rowland.harvard.edu>2009-06-02 11:53:55 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-06-15 21:44:47 -0700
commitf9c99bb8b3a1ec81af68d484a551307326c2e933 (patch)
tree9031ebe390ecd558d54ad484dde5ba66dcf823b7 /drivers/usb/serial/io_ti.c
parentc706ebdfc8955b850e477255a8c0f93f9f14712d (diff)
USB: usb-serial: replace shutdown with disconnect, release
This patch (as1254) splits up the shutdown method of usb_serial_driver into a disconnect and a release method. The problem is that the usb-serial core was calling shutdown during disconnect handling, but drivers didn't expect it to be called until after all the open file references had been closed. The result was an oops when the close method tried to use memory that had been deallocated by shutdown. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/io_ti.c')
-rw-r--r--drivers/usb/serial/io_ti.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index db964db42d3c..e8bc42f92e79 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2663,7 +2663,7 @@ cleanup:
return -ENOMEM;
}
-static void edge_shutdown(struct usb_serial *serial)
+static void edge_disconnect(struct usb_serial *serial)
{
int i;
struct edgeport_port *edge_port;
@@ -2673,12 +2673,22 @@ static void edge_shutdown(struct usb_serial *serial)
for (i = 0; i < serial->num_ports; ++i) {
edge_port = usb_get_serial_port_data(serial->port[i]);
edge_remove_sysfs_attrs(edge_port->port);
+ }
+}
+
+static void edge_release(struct usb_serial *serial)
+{
+ int i;
+ struct edgeport_port *edge_port;
+
+ dbg("%s", __func__);
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ edge_port = usb_get_serial_port_data(serial->port[i]);
edge_buf_free(edge_port->ep_out_buf);
kfree(edge_port);
- usb_set_serial_port_data(serial->port[i], NULL);
}
kfree(usb_get_serial_data(serial));
- usb_set_serial_data(serial, NULL);
}
@@ -2915,7 +2925,8 @@ static struct usb_serial_driver edgeport_1port_device = {
.throttle = edge_throttle,
.unthrottle = edge_unthrottle,
.attach = edge_startup,
- .shutdown = edge_shutdown,
+ .disconnect = edge_disconnect,
+ .release = edge_release,
.port_probe = edge_create_sysfs_attrs,
.ioctl = edge_ioctl,
.set_termios = edge_set_termios,
@@ -2944,7 +2955,8 @@ static struct usb_serial_driver edgeport_2port_device = {
.throttle = edge_throttle,
.unthrottle = edge_unthrottle,
.attach = edge_startup,
- .shutdown = edge_shutdown,
+ .disconnect = edge_disconnect,
+ .release = edge_release,
.port_probe = edge_create_sysfs_attrs,
.ioctl = edge_ioctl,
.set_termios = edge_set_termios,