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serial: imx: fix a possible NULL dereference 

of_match_device could return NULL, and so cause a NULL pointer
dereference later.
Even if the probability of this case is very low, fixing it made
static analyzers happy.
Solving this with of_device_get_match_data made also code simplier.

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
LABBE Corentin 2015-11-24 15:36:57 +01:00 committed by Greg Kroah-Hartman
parent 4d2ae601d8
commit 5f8b90431f
1 changed files with 2 additions and 5 deletions
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7
drivers/tty/serial/imx.c
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@ -1857,11 +1857,10 @@ static int serial_imx_probe_dt(struct imx_port *sport,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *of_id =
of_match_device(imx_uart_dt_ids, &pdev->dev);
int ret;
if (!np)
sport->devdata = of_device_get_match_data(&pdev->dev);
if (!sport->devdata)
/* no device tree device */
return 1;
@ -1878,8 +1877,6 @@ static int serial_imx_probe_dt(struct imx_port *sport,
if (of_get_property(np, "fsl,dte-mode", NULL))
sport->dte_mode = 1;
sport->devdata = of_id->data;
return 0;
}
#else