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of: base: Avoid console probe delay when fw_devlink.strict=1

Commit 71066545b48e ("driver core: Set fw_devlink.strict=1 by default")
enabled iommus and dmas dependency enforcement by default. On some
systems, this caused the console device's probe to get delayed until the
deferred_probe_timeout expires.

We need consoles to work as soon as possible, so mark the console device
node with FWNODE_FLAG_BEST_EFFORT so that fw_delink knows not to delay
the probe of the console device for suppliers without drivers. The
driver can then make the decision on where it can probe without those
suppliers or defer its probe.

Fixes: 71066545b48e ("driver core: Set fw_devlink.strict=1 by default")
Reported-by: Sascha Hauer <sha@pengutronix.de>
Reported-by: Peng Fan <peng.fan@nxp.com>
Tested-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20220623080344.783549-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

authored by

Saravana Kannan and committed by
Greg Kroah-Hartman a244ec36 8f486cab

+2
+2
drivers/of/base.c
··· 1919 1919 of_property_read_string(of_aliases, "stdout", &name); 1920 1920 if (name) 1921 1921 of_stdout = of_find_node_opts_by_path(name, &of_stdout_options); 1922 + if (of_stdout) 1923 + of_stdout->fwnode.flags |= FWNODE_FLAG_BEST_EFFORT; 1922 1924 } 1923 1925 1924 1926 if (!of_aliases)