linux-kernel - Re: [PATCH] thunderbolt: Resume PCIe bridges after switch is found on AMD USB4 controller

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Message-ID: <YxYXfhCCaj6tGAx7@black.fi.intel.com>
Date:   Mon, 5 Sep 2022 18:36:30 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     andreas.noever@...il.com, michael.jamet@...el.com,
        YehezkelShB@...il.com, sanju.mehta@....com,
        mario.limonciello@....com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thunderbolt: Resume PCIe bridges after switch is found
 on AMD USB4 controller

On Mon, Sep 05, 2022 at 11:24:26PM +0800, Kai-Heng Feng wrote:
> > can you check if that is happening? It should show up in the dmesg when
> > CONFIG_PCI_DEBUG=y but I don't see it in yours.
> 
> That's because there isn't any child device yet, so the function bails early:
> if (!dev->subordinate || list_empty(&dev->subordinate->devices))

Ah, of course I forgot that this is hotplug case so there are no need
for the delays :/