linux-kernel - Re: [PATCH v2 5/8] PCI: brcmstb: Fix potential premature regulator disabling

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Message-ID: <213fd5f9-405d-403c-8ebb-a2b371f0ab22@broadcom.com>
Date: Thu, 20 Feb 2025 09:30:15 -0800
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: Jim Quinlan <james.quinlan@...adcom.com>, linux-pci@...r.kernel.org,
 Nicolas Saenz Julienne <nsaenz@...nel.org>,
 Bjorn Helgaas <bhelgaas@...gle.com>,
 Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
 Cyril Brulebois <kibi@...ian.org>, Stanimir Varbanov <svarbanov@...e.de>,
 bcm-kernel-feedback-list@...adcom.com, jim2101024@...il.com
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kw@...ux.com>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
 Rob Herring <robh@...nel.org>,
 "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
 <linux-rpi-kernel@...ts.infradead.org>,
 "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
 <linux-arm-kernel@...ts.infradead.org>,
 open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/8] PCI: brcmstb: Fix potential premature regulator
 disabling



On 2/14/2025 9:39 AM, Jim Quinlan wrote:
> Our system for enabling and disabling regulators is designed to work only
> on the port driver below the root complex.  The conditions to discriminate
> for this case should be the same when we are adding or removing the bus.
> Without this change the regulators may be disabled prematurely when a bus
> further down the tree is removed.
> 
> Fixes: 9e6be018b263 ("PCI: brcmstb: Enable child bus device regulators from DT")
> Signed-off-by: Jim Quinlan <james.quinlan@...adcom.com>

Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
-- 
Florian