Re: [RFC PATCH v6 6/9] media: tegra: Add Tegra210 Video input driver

Dmitry Osipenko
2020-04-05T21:11:32Z

04.04.2020 04:25, Sowjanya Komatineni пишет:
...
> +static int tegra_vi_tpg_channels_alloc(struct tegra_vi *vi)
> +{
> + struct tegra_vi_channel *chan, *tmp;
> + unsigned int port_num;
> + unsigned int nchannels = vi->soc->vi_max_channels;
> + int ret = 0;
> +
> + for (port_num = 0; port_num < nchannels; port_num++) {
> + /*
> + * Do not use devm_kzalloc as memory is freed immediately
> + * when device instance is unbound but application might still
> + * be holding the device node open. Channel memory allocated
> + * with kzalloc is freed during video device release callback.
> + */
> + chan = kzalloc(sizeof(*chan), GFP_KERNEL);

Why anyone would want to unbind this driver in practice?

I think it should make more sense to set suppress_bind_attrs=true.