linux-kernel - [PATCH 4.5 01/88] clocksource/drivers/tango-xtal: Fix boot hang due to incorrect test

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Date:	Mon,  9 May 2016 09:20:50 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Marc Gonzalez <marc_gonzalez@...madesigns.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: [PATCH 4.5 01/88] clocksource/drivers/tango-xtal: Fix boot hang due to incorrect test

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Lezcano <daniel.lezcano@...aro.org>

commit 16eeed7e5558a3dcf30f75526a896b2632f299f9 upstream.

Commit 0881841f7e78 introduced a regression by inverting a test check
after calling clocksource_mmio_init(). That results on the system to
hang at boot time.

Fix it by inverting the test again.

Fixes: 0881841f7e78 ("Replace code by clocksource_mmio_init")
Reported-by: Marc Gonzalez <marc_gonzalez@...madesigns.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/clocksource/tango_xtal.c
+++ b/drivers/clocksource/tango_xtal.c
@@ -42,7 +42,7 @@ static void __init tango_clocksource_ini
 
 	ret = clocksource_mmio_init(xtal_in_cnt, "tango-xtal", xtal_freq, 350,
 				    32, clocksource_mmio_readl_up);
-	if (!ret) {
+	if (ret) {
 		pr_err("%s: registration failed\n", np->full_name);
 		return;
 	}