On Fri, Feb 27, 2015 at 7:44 PM, Aleksander Morgado
<aleksan...@aleksander.es> wrote:
> Access to the 'serial_table' array needs to be protected by the spinlock.
>
> Signed-off-by: Aleksander Morgado <aleksan...@aleksander.es>
> ---
> drivers/net/usb/hso.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
> index 3c8dfe5..4f6deff 100644
> --- a/drivers/net/usb/hso.c
> +++ b/drivers/net/usb/hso.c
> @@ -607,19 +607,24 @@ static struct hso_serial
> *get_serial_by_shared_int_and_type(
> struct hso_shared_int *shared_int,
> int mux)
> {
> + struct hso_serial *serial = NULL;
> int i, port;
> + unsigned long flags;
>
> port = hso_mux_to_port(mux);
>
> + spin_lock_irqsave(&serial_table_lock, flags);
> for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
> if (serial_table[i] &&
> (dev2ser(serial_table[i])->shared_int == shared_int) &&
> ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
> - return dev2ser(serial_table[i]);
> + serial = dev2ser(serial_table[i]);
> + break;
> }
> }
> + spin_unlock_irqrestore(&serial_table_lock, flags);
>
> - return NULL;
> + return serial;
> }
>
> static struct hso_serial *get_serial_by_index(unsigned index)
> --
> 2.3.1
>
Seems there are actually more places where this has to be done; I'll
send an updated version of the patch.
--
Aleksander
https://aleksander.es
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