linux-kernel - Re: [PATCH] PCI: take the rescan lock when adding devices during host probe

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Message-ID: <95e25468-722b-4c6a-b8ea-b142d4a66f72@kernel.org>
Date: Mon, 30 Sep 2024 18:09:48 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>, Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
 Konrad Dybcio <konradybcio@...nel.org>
Subject: Re: [PATCH] PCI: take the rescan lock when adding devices during host
 probe

On 26.09.2024 3:09 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> Since adding the PCI power control code, we may end up with a race
> between the pwrctl platform device rescanning the bus and the host
> controller probe function. The latter needs to take the rescan lock when
> adding devices or may crash.
> 
> Reported-by: Konrad Dybcio <konradybcio@...nel.org>
> Fixes: 4565d2652a37 ("PCI/pwrctl: Add PCI power control core code")
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---

Tested-by: Konrad Dybcio <konradybcio@...nel.org>

Konrad