patch "iio: adc: qcom-spmi-adc5: Fix the channel name" added to char-misc-linus

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

iio: adc: qcom-spmi-adc5: Fix the channel name

to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 701c875aded880013aacac608832995c4b052257 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <[email protected]>
Date: Wed, 18 Jan 2023 12:06:23 +0200
Subject: iio: adc: qcom-spmi-adc5: Fix the channel name

The node name can contain an address part which is unused by the driver. Moreover, this string is propagated into the userspace label, sysfs filenames *and breaking ABI*.

Cut the address part out before assigning the channel name.

---
 drivers/iio/adc/qcom-spmi-adc5.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

index 821fee60a765..d1b86570768a 100644
@@ -626,12 +626,20 @@ static int adc5_get_fw_channel_data(struct adc5_chip *adc,
 				    struct fwnode_handle *fwnode,
 				    const struct adc5_data *data)
 {
-	const char *name = fwnode_get_name(fwnode), *channel_name;
+	const char *channel_name;
+	char *name;
 	u32 chan, value, varr[2];
 	u32 sid = 0;
 	int ret;
 	struct device *dev = adc->dev;
 
+	name = devm_kasprintf(dev, GFP_KERNEL, "%pfwP", fwnode);
+	if (!name)
+		return -ENOMEM;
+
+	/* Cut the address part */
+	name[strchrnul(name, '@') - name] = '\0';
+
 	ret = fwnode_property_read_u32(fwnode, "reg", &chan);
 	if (ret) {
 		dev_err(dev, "invalid channel number %s\n", name);

2.40.0