[PATCH v7 2/4] driver core: add deferring probe reason to devices_deferred property
andy.shevchenko at gmail.com
Tue Jun 30 06:00:01 EDT 2020
On Tue, Jun 30, 2020 at 11:32 AM Andrzej Hajda <a.hajda at samsung.com> wrote:
> On 29.06.2020 18:36, Andy Shevchenko wrote:
> > On Mon, Jun 29, 2020 at 2:22 PM Andrzej Hajda <a.hajda at samsung.com> wrote:
> >> /sys/kernel/debug/devices_deferred property contains list of deferred devices.
> >> This list does not contain reason why the driver deferred probe, the patch
> >> improves it.
> >> The natural place to set the reason is dev_err_probe function introduced recently,
> >> ie. if dev_err_probe will be called with -EPROBE_DEFER instead of printk the message
> >> will be attached to deferred device and printed when user read devices_deferred
> > to a deferred
> > reads
> OK, thx.
> >> property.
> >> list_for_each_entry(curr, &deferred_probe_pending_list, deferred_probe)
> >> - seq_printf(s, "%s\n", dev_name(curr->device));
> >> + seq_printf(s, "%s\t%s", dev_name(curr->device),
> >> + curr->device->p->deferred_probe_reason ?: "\n");
> > Hmm... "\t" will be dangling in the latter case
> Hmm, I followed your advice  :)
Ah, indeed :-)
Okay, as I said I'm fine with the code. Since it's debugfs, we are fine.
With Best Regards,
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