On Wed, 2017-11-29 at 17:40 +0100, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> Date: Wed, 29 Nov 2017 17:30:36 +0100
>
> Move two debug messages so that a null pointer access can not happen
> for the variable "ch" in these functions.
An actual defect fix!
Here you could probably cc stable too.
>
> This issue was detected by using the Coccinelle software.
>
> Fixes: 669fef464468d3f02d60a5cf725fc097e03c5cb8 ("serial: jsm: Convert jsm_printk to jsm_dbg")
>
> Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/tty/serial/jsm/jsm_tty.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c
> index 469927d37b41..a34eed7344e5 100644
> --- a/drivers/tty/serial/jsm/jsm_tty.c
> +++ b/drivers/tty/serial/jsm/jsm_tty.c
> @@ -521,11 +521,10 @@ void jsm_input(struct jsm_channel *ch)
> int s = 0;
> int i = 0;
>
> - jsm_dbg(READ, &ch->ch_bd->pci_dev, "start\n");
> -
> if (!ch)
> return;
>
> + jsm_dbg(READ, &ch->ch_bd->pci_dev, "start\n");
> port = &ch->uart_port.state->port;
> tp = port->tty;
>
> @@ -647,10 +646,10 @@ static void jsm_carrier(struct jsm_channel *ch)
> int virt_carrier = 0;
> int phys_carrier = 0;
>
> - jsm_dbg(CARR, &ch->ch_bd->pci_dev, "start\n");
> if (!ch)
> return;
>
> + jsm_dbg(CARR, &ch->ch_bd->pci_dev, "start\n");
> bd = ch->ch_bd;
>
> if (!bd)
--
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