From: Pan Bian <bianpan2016@163.com>
Date: Sun, 23 Apr 2017 05:43:24 +0000 (+0800)
Subject: rtc: snvs: fix an incorrect check of return value
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d36d6e43078a6ccc1e984534f292e19ab2733935;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

rtc: snvs: fix an incorrect check of return value


[ Upstream commit 758929005f06f954b7e1c87a1c9fdb44157b228f ]

Function devm_regmap_init_mmio() returns an ERR_PTR on error. However,
in function snvs_rtc_probe() its return value is checked against NULL.
This patch fixes it by checking the return value with IS_ERR().

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index 0f11c2a228e3..a753ef9c1459 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -257,7 +257,7 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 		of_property_read_u32(pdev->dev.of_node, "offset", &data->offset);
 	}
 
-	if (!data->regmap) {
+	if (IS_ERR(data->regmap)) {
 		dev_err(&pdev->dev, "Can't find snvs syscon\n");
 		return -ENODEV;
 	}