On Sat, Oct 20, 2012 at 01:04:12PM +0200, Thierry Reding wrote:

On Thu, Oct 04, 2012 at 07:59:20PM +0200, Steffen Trumtrar wrote:
[...]

quoted

diff --git a/drivers/of/of_videomode.c b/drivers/of/of_videomode.c

[...]

quoted

+#if defined(CONFIG_DRM)

This should be:

	#if IS_ENABLED(CONFIG_DRM)

or the code below won't be included if DRM is built as a module. But see
my other replies as to how we can probably handle this better by moving
this into the DRM subsystem.

I already started with moving...now I only need some time to finish with it.

quoted

+int videomode_to_display_mode(struct videomode *vm, struct drm_display_mode *dmode)
+{
+	memset(dmode, 0, sizeof(*dmode));

It appears the usual method to obtain a drm_display_mode to allocate it
using drm_mode_create(), which will allocate it and associate it with
the struct drm_device.

Now, if you do a memset() on the structure you'll overwrite a number of
fields that have previously been initialized and are actually required
to get everything cleaned up properly later on.

So I think we should remove the call to memset().

I was not aware of that. The memset has to go than, of course.

quoted

+int of_get_fb_videomode(struct device_node *np, struct fb_videomode *fb,
+			int index)
+{

[...]

quoted

+}
+EXPORT_SYMBOL_GPL(of_get_drm_display_mode);

This should be:

	EXPORT_SYMBOL_GPL(of_get_fb_videomode);

Oops.

Regrads,

Steffen


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