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b8f0e82044
Fix port-data memory leak in usb-serial probe error path by moving port
data allocation to port_probe.
Since commit a1028f0abf ("usb: usb_wwan: replace release and disconnect
with a port_remove hook") port data is deallocated in port_remove. This
leaves a possibility for memory leaks if usb-serial probe fails after
attach but before the port in question has been successfully registered.
Note that this patch also fixes two additional memory leaks in the error
path of attach should port initialisation fail for any port as the urbs
were never freed and neither was the data of any of the successfully
initialised ports.
Compile-only tested.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*
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* Definitions for USB serial mobile broadband cards
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*/
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#ifndef __LINUX_USB_USB_WWAN
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#define __LINUX_USB_USB_WWAN
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extern void usb_wwan_dtr_rts(struct usb_serial_port *port, int on);
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extern int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port);
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extern void usb_wwan_close(struct usb_serial_port *port);
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extern int usb_wwan_port_probe(struct usb_serial_port *port);
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extern int usb_wwan_port_remove(struct usb_serial_port *port);
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extern int usb_wwan_write_room(struct tty_struct *tty);
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extern void usb_wwan_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port,
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struct ktermios *old);
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extern int usb_wwan_tiocmget(struct tty_struct *tty);
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extern int usb_wwan_tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear);
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extern int usb_wwan_ioctl(struct tty_struct *tty,
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unsigned int cmd, unsigned long arg);
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extern int usb_wwan_send_setup(struct usb_serial_port *port);
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extern int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
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const unsigned char *buf, int count);
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extern int usb_wwan_chars_in_buffer(struct tty_struct *tty);
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#ifdef CONFIG_PM
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extern int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message);
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extern int usb_wwan_resume(struct usb_serial *serial);
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#endif
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/* per port private data */
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#define N_IN_URB 4
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#define N_OUT_URB 4
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#define IN_BUFLEN 4096
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#define OUT_BUFLEN 4096
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struct usb_wwan_intf_private {
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spinlock_t susp_lock;
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unsigned int suspended:1;
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int in_flight;
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int (*send_setup) (struct usb_serial_port *port);
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void *private;
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};
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struct usb_wwan_port_private {
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/* Input endpoints and buffer for this port */
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struct urb *in_urbs[N_IN_URB];
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u8 *in_buffer[N_IN_URB];
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/* Output endpoints and buffer for this port */
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struct urb *out_urbs[N_OUT_URB];
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u8 *out_buffer[N_OUT_URB];
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unsigned long out_busy; /* Bit vector of URBs in use */
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int opened;
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struct usb_anchor delayed;
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/* Settings for the port */
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int rts_state; /* Handshaking pins (outputs) */
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int dtr_state;
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int cts_state; /* Handshaking pins (inputs) */
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int dsr_state;
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int dcd_state;
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int ri_state;
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unsigned long tx_start_time[N_OUT_URB];
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};
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#endif /* __LINUX_USB_USB_WWAN */
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