linux-kernel - Re: [PATCH v3 0/8] thunderbolt: Intel Ice Lake support

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Date:   Tue, 20 Aug 2019 13:34:04 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     Mario.Limonciello@...l.com
Cc:     mika.westerberg@...ux.intel.com, linux-kernel@...r.kernel.org,
        andreas.noever@...il.com, michael.jamet@...el.com,
        YehezkelShB@...il.com, rjw@...ysocki.net, lenb@...nel.org,
        anthony.wong@...onical.com, rajmohan.mani@...el.com,
        raanan.avargil@...el.com, David.Laight@...LAB.COM,
        linux-acpi@...r.kernel.org
Subject: Re: [PATCH v3 0/8] thunderbolt: Intel Ice Lake support

On Mon, Aug 19, 2019 at 04:29:35PM +0000, Mario.Limonciello@...l.com wrote:
> I've run into a problem when using
> a WD19TB that after unplugging it will cause the following to spew in dmesg:
> 
> [ 2198.017003] ============================================
> [ 2198.017005] WARNING: possible recursive locking detected
> [ 2198.017008] 5.3.0-rc5+ #75 Not tainted
> [ 2198.017009] --------------------------------------------
> [ 2198.017012] irq/122-pciehp/121 is trying to acquire lock:
> [ 2198.017015] 00000000801d4de8 (&ctrl->reset_lock){.+.+}, at: pciehp_check_presence+0x1b/0x80
> [ 2198.017026] 
>                but task is already holding lock:
> [ 2198.017028] 000000000899e2eb (&ctrl->reset_lock){.+.+}, at: pciehp_ist+0xaf/0x1c0

This was first reported by Theodore in April and appears to be a
false positive:

https://lore.kernel.org/linux-pci/20190402083257.kyqmirq4ovzscxsv@wunner.de/

Thanks,

Lukas