Re: [PATCH v8 2/6] video: add of helper for videomode

Steffen Trumtrar
2012-11-13T08:32:40Z

Hi!

On Mon, Nov 12, 2012 at 07:58:40PM +0100, Sascha Hauer wrote:
> Hi Steffen,
>
> You lose memory in several places:
>
> On Mon, Nov 12, 2012 at 04:37:02PM +0100, Steffen Trumtrar wrote:
> > +static struct display_timing *of_get_display_timing(struct device_node *np)
> > +{
> > + struct display_timing *dt;
> > + int ret = 0;
> > +
> > + dt = kzalloc(sizeof(*dt), GFP_KERNEL);
> > + if (!dt) {
> > + pr_err("%s: could not allocate display_timing struct\n", __func__);
> > + return NULL;
> > + }
> > +
> > + ret |= parse_property(np, "hback-porch", &dt->hback_porch);
> > + ret |= parse_property(np, "hfront-porch", &dt->hfront_porch);
> > + ret |= parse_property(np, "hactive", &dt->hactive);
> > + ret |= parse_property(np, "hsync-len", &dt->hsync_len);
> > + ret |= parse_property(np, "vback-porch", &dt->vback_porch);
> > + ret |= parse_property(np, "vfront-porch", &dt->vfront_porch);
> > + ret |= parse_property(np, "vactive", &dt->vactive);
> > + ret |= parse_property(np, "vsync-len", &dt->vsync_len);
> > + ret |= parse_property(np, "clock-frequency", &dt->pixelclock);
> > +
> > + of_property_read_u32(np, "vsync-active", &dt->vsync_pol_active);
> > + of_property_read_u32(np, "hsync-active", &dt->hsync_pol_active);
> > + of_property_read_u32(np, "de-active", &dt->de_pol_active);
> > + of_property_read_u32(np, "pixelclk-inverted", &dt->pixelclk_pol);
> > + dt->interlaced = of_property_read_bool(np, "interlaced");
> > + dt->doublescan = of_property_read_bool(np, "doublescan");
> > +
> > + if (ret) {
> > + pr_err("%s: error reading timing properties\n", __func__);
> > + return NULL;
>
> Here
>
> > + }
> > +
> > + return dt;
> > +}
> > +
> > +/**
> > + * of_get_display_timings - parse all display_timing entries from a device_node
> > + * @np: device_node with the subnodes
> > + **/
> > +struct display_timings *of_get_display_timings(struct device_node *np)
> > +{
> > + struct device_node *timings_np;
> > + struct device_node *entry;
> > + struct device_node *native_mode;
> > + struct display_timings *disp;
> > +
> > + if (!np) {
> > + pr_err("%s: no devicenode given\n", __func__);
> > + return NULL;
> > + }
> > +
> > + timings_np = of_find_node_by_name(np, "display-timings");
> > + if (!timings_np) {
> > + pr_err("%s: could not find display-timings node\n", __func__);
> > + return NULL;
> > + }
> > +
> > + disp = kzalloc(sizeof(*disp), GFP_KERNEL);
> > + if (!disp)
> > + return -ENOMEM;
> > +
> > + entry = of_parse_phandle(timings_np, "native-mode", 0);
> > + /* assume first child as native mode if none provided */
> > + if (!entry)
> > + entry = of_get_next_child(np, NULL);
> > + if (!entry) {
> > + pr_err("%s: no timing specifications given\n", __func__);
> > + return NULL;
>
> Here
>
> > + }
> > +
> > + pr_info("%s: using %s as default timing\n", __func__, entry->name);
> > +
> > + native_mode = entry;
> > +
> > + disp->num_timings = of_get_child_count(timings_np);
> > + disp->timings = kzalloc(sizeof(struct display_timing *)*disp->num_timings,
> > + GFP_KERNEL);
> > + if (!disp->timings)
> > + return -ENOMEM;
>
> Here
>
> > +
> > + disp->num_timings = 0;
> > + disp->native_mode = 0;
> > +
> > + for_each_child_of_node(timings_np, entry) {
> > + struct display_timing *dt;
> > +
> > + dt = of_get_display_timing(entry);
> > + if (!dt) {
> > + /* to not encourage wrong devicetrees, fail in case of an error */
> > + pr_err("%s: error in timing %d\n", __func__, disp->num_timings+1);
> > + return NULL;
>
> Here
>
> > + }
> > +
> > + if (native_mode == entry)
> > + disp->native_mode = disp->num_timings;
> > +
> > + disp->timings[disp->num_timings] = dt;
> > + disp->num_timings++;
> > + }
> > + of_node_put(timings_np);
> > +
> > + if (disp->num_timings > 0)
> > + pr_info("%s: got %d timings. Using timing #%d as default\n", __func__,
> > + disp->num_timings , disp->native_mode + 1);
> > + else {
> > + pr_err("%s: no valid timings specified\n", __func__);
> > + return NULL;
>
> and here
>

Well,... you are right. :-(

Regards,
Steffen

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