[RFC PATCH v1 8/9] net: ipconfig: Force fw_devlink to unblock any devices that might probe

From: Saravana Kannan via iommu <iommu@lists.linux-foundation.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	 Kevin Hilman <khilman@kernel.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	 Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
	Joerg Roedel <joro@8bytes.org>,  Will Deacon <will@kernel.org>,
	Andrew Lunn <andrew@lunn.ch>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	 Russell King <linux@armlinux.org.uk>,
	"David S. Miller" <davem@davemloft.net>,
	 Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	 Linus Walleij <linus.walleij@linaro.org>,
	 Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Daniel Scally <djrscally@gmail.com>,
	 Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	 Sakari Ailus <sakari.ailus@linux.intel.com>,
	Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
	 David Ahern <dsahern@kernel.org>
Cc: Rob Herring <robh@kernel.org>,
	linux-acpi@vger.kernel.org,
	Saravana Kannan <saravanak@google.com>,
	linux-pm@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Nathan Chancellor <nathan@kernel.org>,
	linux-gpio@vger.kernel.org, iommu@lists.linux-foundation.org,
	Mark Brown <broonie@kernel.org>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	John Stultz <jstultz@google.com>,
	kernel-team@android.com,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [RFC PATCH v1 8/9] net: ipconfig: Force fw_devlink to unblock any devices that might probe
Date: Thu, 26 May 2022 01:15:47 -0700	[thread overview]
Message-ID: <20220526081550.1089805-9-saravanak@google.com> (raw)
In-Reply-To: <20220526081550.1089805-1-saravanak@google.com>

If there are network devices that could probe without some of their
suppliers probing and those network devices are needed for IP auto
config to work, then fw_devlink=on might break that usecase by blocking
the network devices from probing by the time IP auto config starts.

So, when IP auto config is enabled, make sure fw_devlink doesn't block
the probing of any device that has a driver by the time we get to IP
auto config.

Signed-off-by: Saravana Kannan <saravanak@google.com>
---
 net/ipv4/ipconfig.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 9d41d5d5cd1e..aa7b8ba68ca6 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -1435,6 +1435,8 @@ static int __init wait_for_devices(void)
 {
 	int i;
 
+	fw_devlink_unblock_may_probe();
+
 	for (i = 0; i < DEVICE_WAIT_MAX; i++) {
 		struct net_device *dev;
 		int found = 0;
-- 
2.36.1.124.g0e6072fb45-goog

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