From 12ddc74e8e25107eda81aceb74e3311c1480b381 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 17 Oct 2012 13:34:57 +0200 Subject: [PATCH] USB: io_edgeport: fix port-data memory leak commit c27f3efc56080a246f6ab7f57f0a6f56d256d769 upstream. Fix port-data memory leak by moving port data allocation and deallocation to port_probe and port_remove. Since commit 0998d0631001288 (device-core: Ensure drvdata = NULL when no driver is bound) the port private data is no longer freed at release as it is no longer accessible. Compile-only tested. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_edgeport.c | 54 +++++++++++++++++--------------- drivers/usb/serial/io_tables.h | 8 +++++ 2 files changed, 37 insertions(+), 25 deletions(-) diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index e1f5ccd1e8f8..dca27a5269f7 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -228,6 +228,8 @@ static int edge_get_icount(struct tty_struct *tty, static int edge_startup(struct usb_serial *serial); static void edge_disconnect(struct usb_serial *serial); static void edge_release(struct usb_serial *serial); +static int edge_port_probe(struct usb_serial_port *port); +static int edge_port_remove(struct usb_serial_port *port); #include "io_tables.h" /* all of the devices that this driver supports */ @@ -2921,9 +2923,8 @@ static void load_application_firmware(struct edgeport_serial *edge_serial) static int edge_startup(struct usb_serial *serial) { struct edgeport_serial *edge_serial; - struct edgeport_port *edge_port; struct usb_device *dev; - int i, j; + int i; int response; bool interrupt_in_found; bool bulk_in_found; @@ -3007,26 +3008,6 @@ static int edge_startup(struct usb_serial *serial) /* we set up the pointers to the endpoints in the edge_open function, * as the structures aren't created yet. */ - /* set up our port private structures */ - for (i = 0; i < serial->num_ports; ++i) { - edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL); - if (edge_port == NULL) { - dev_err(&serial->dev->dev, "%s - Out of memory\n", - __func__); - for (j = 0; j < i; ++j) { - kfree(usb_get_serial_port_data(serial->port[j])); - usb_set_serial_port_data(serial->port[j], - NULL); - } - usb_set_serial_data(serial, NULL); - kfree(edge_serial); - return -ENOMEM; - } - spin_lock_init(&edge_port->ep_lock); - edge_port->port = serial->port[i]; - usb_set_serial_port_data(serial->port[i], edge_port); - } - response = 0; if (edge_serial->is_epic) { @@ -3175,12 +3156,35 @@ static void edge_release(struct usb_serial *serial) dbg("%s", __func__); - for (i = 0; i < serial->num_ports; ++i) - kfree(usb_get_serial_port_data(serial->port[i])); - kfree(edge_serial); } +static int edge_port_probe(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + + edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); + if (!edge_port) + return -ENOMEM; + + spin_lock_init(&edge_port->ep_lock); + edge_port->port = port; + + usb_set_serial_port_data(port, edge_port); + + return 0; +} + +static int edge_port_remove(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + + edge_port = usb_get_serial_port_data(port); + kfree(edge_port); + + return 0; +} + module_usb_serial_driver(serial_drivers, id_table_combined); MODULE_AUTHOR(DRIVER_AUTHOR); diff --git a/drivers/usb/serial/io_tables.h b/drivers/usb/serial/io_tables.h index 350afddb55ba..1511dd0ad324 100644 --- a/drivers/usb/serial/io_tables.h +++ b/drivers/usb/serial/io_tables.h @@ -110,6 +110,8 @@ static struct usb_serial_driver edgeport_2port_device = { .attach = edge_startup, .disconnect = edge_disconnect, .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, .ioctl = edge_ioctl, .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, @@ -139,6 +141,8 @@ static struct usb_serial_driver edgeport_4port_device = { .attach = edge_startup, .disconnect = edge_disconnect, .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, .ioctl = edge_ioctl, .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, @@ -168,6 +172,8 @@ static struct usb_serial_driver edgeport_8port_device = { .attach = edge_startup, .disconnect = edge_disconnect, .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, .ioctl = edge_ioctl, .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, @@ -197,6 +203,8 @@ static struct usb_serial_driver epic_device = { .attach = edge_startup, .disconnect = edge_disconnect, .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, .ioctl = edge_ioctl, .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, -- 2.39.5