linux-kernel - [PATCH] of: correct of_console

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Date:	Wed,  3 Sep 2014 11:06:43 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Grant Likely <grant.likely@...aro.org>
Cc:	Rob Herring <robh+dt@...nel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>,
	Brian Norris <computersforpeace@...il.com>
Subject: [PATCH] of: correct of_console_check()'s return value

The comments above of_console_check() say that it will return TRUE if it
registers a preferred console, but add_preferred_console() uses a
0-equals-success convention, so ths leaves of_console_check() with an
inconsistent policy for its return values.

Fortunately, nobody was actually checking the return value of
of_console_check(), so this isn't significant at the moment.

But let's match the comments, so we're doing what we say.

Fixes: 3482f2c52b77 ('of: Create of_console_check() for selecting a console specified in /chosen')
Signed-off-by: Brian Norris <computersforpeace@...il.com>
Cc: Grant Likely <grant.likely@...aro.org>
---
This is one way to fix it. Another possibility includes changing
of_console_check() to use 0-as-success

 drivers/of/base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index d8574adf0d62..bcfd08c2795c 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1986,7 +1986,7 @@ bool of_console_check(struct device_node *dn, char *name, int index)
 {
 	if (!dn || dn != of_stdout || console_set_on_cmdline)
 		return false;
-	return add_preferred_console(name, index, NULL);
+	return !add_preferred_console(name, index, NULL);
 }
 EXPORT_SYMBOL_GPL(of_console_check);
 
-- 
1.9.1

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