Patch "rtc: snvs: fix an incorrect check of return value" has been added to the 4.9-stable tree

Patch "rtc: snvs: fix an incorrect check of return value" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    rtc: snvs: fix an incorrect check of return value

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rtc-snvs-fix-an-incorrect-check-of-return-value.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Apr  9 17:09:24 CEST 2018
From: Pan Bian <bianpan2016@163.com>
Date: Sun, 23 Apr 2017 13:43:24 +0800
Subject: rtc: snvs: fix an incorrect check of return value

From: Pan Bian <bianpan2016@163.com>


[ 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>
---
 drivers/rtc/rtc-snvs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -257,7 +257,7 @@ static int snvs_rtc_probe(struct platfor
 		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;
 	}


Patches currently in stable-queue which might be from bianpan2016@163.com are

queue-4.9/cx25840-fix-unchecked-return-values.patch
queue-4.9/usb-dwc3-keystone-check-return-value.patch
queue-4.9/rtc-snvs-fix-an-incorrect-check-of-return-value.patch