Patch "iio: adc: cpcap: fix incorrect validation" has been added to the 4.14-stable tree

Patch "iio: adc: cpcap: fix incorrect validation" has been added to the 4.14-stable tree

[gregkh]

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

    iio: adc: cpcap: fix incorrect validation

to the 4.14-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:
     iio-adc-cpcap-fix-incorrect-validation.patch
and it can be found in the queue-4.14 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 81b039ec36a41a5451e1e36f05bb055eceab1dc8 Mon Sep 17 00:00:00 2001
From: Pan Bian <bianpan2016@163.com>
Date: Mon, 13 Nov 2017 00:01:20 +0800
Subject: iio: adc: cpcap: fix incorrect validation

From: Pan Bian <bianpan2016@163.com>

commit 81b039ec36a41a5451e1e36f05bb055eceab1dc8 upstream.

Function platform_get_irq_byname() returns a negative error code on
failure, and a zero or positive number on success. However, in function
cpcap_adc_probe(), positive IRQ numbers are also taken as error cases.
Use "if (ddata->irq < 0)" instead of "if (!ddata->irq)" to validate the
return value of platform_get_irq_byname().

Signed-off-by: Pan Bian <bianpan2016@163.com>
Fixes: 25ec249632d50 ("iio: adc: cpcap: Add minimal support for CPCAP PMIC ADC")
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/adc/cpcap-adc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/cpcap-adc.c
+++ b/drivers/iio/adc/cpcap-adc.c
@@ -1012,7 +1012,7 @@ static int cpcap_adc_probe(struct platfo
 	platform_set_drvdata(pdev, indio_dev);
 
 	ddata->irq = platform_get_irq_byname(pdev, "adcdone");
-	if (!ddata->irq)
+	if (ddata->irq < 0)
 		return -ENODEV;
 
 	error = devm_request_threaded_irq(&pdev->dev, ddata->irq, NULL,


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

queue-4.14/efi-esrt-use-memunmap-instead-of-kfree-to-free-the-remapping.patch
queue-4.14/iio-adc-cpcap-fix-incorrect-validation.patch