[media] V4L: omap1-camera: fix Oops with NULL platform data

Consistently check for platform data != NULL before dereferencing.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/omap1_camera.c b/drivers/media/video/omap1_camera.c
index f24bcaf..e87ae2f 100644 (file)
--- a/drivers/media/video/omap1_camera.c
+++ b/drivers/media/video/omap1_camera.c
@@ -1579,10 +1579,10 @@ static int __init omap1_cam_probe(struct platform_device *pdev)
        pcdev->clk = clk;
 
        pcdev->pdata = pdev->dev.platform_data;
-       pcdev->pflags = pcdev->pdata->flags;
-
-       if (pcdev->pdata)
+       if (pcdev->pdata) {
+               pcdev->pflags = pcdev->pdata->flags;
                pcdev->camexclk = pcdev->pdata->camexclk_khz * 1000;
+       }
 
        switch (pcdev->camexclk) {
        case 6000000:
@@ -1592,6 +1592,7 @@ static int __init omap1_cam_probe(struct platform_device *pdev)
        case 24000000:
                break;
        default:
+               /* pcdev->camexclk != 0 => pcdev->pdata != NULL */
                dev_warn(&pdev->dev,
                                "Incorrect sensor clock frequency %ld kHz, "
                                "should be one of 0, 6, 8, 9.6, 12 or 24 MHz, "
@@ -1599,8 +1600,7 @@ static int __init omap1_cam_probe(struct platform_device *pdev)
                                pcdev->pdata->camexclk_khz);
                pcdev->camexclk = 0;
        case 0:
-               dev_info(&pdev->dev,
-                               "Not providing sensor clock\n");
+               dev_info(&pdev->dev, "Not providing sensor clock\n");
        }
 
        INIT_LIST_HEAD(&pcdev->capture);