patch "iio: core: Return error for failed read_reg" added to staging-linus

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

iio: core: Return error for failed read_reg

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-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: Matt Fornero <[email protected]>
Date: Tue, 5 Sep 2017 16:34:10 +0200
Subject: iio: core: Return error for failed read_reg

If an IIO device returns an error code for a read access via debugfs, it is currently ignored by the IIO core (other than emitting an error message). Instead, return this error code to user space, so upper layers can detect it correctly.

---
 drivers/iio/industrialio-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index 17ec4cee51dc..a47428b4d31b 100644
@@ -310,8 +310,10 @@ static ssize_t iio_debugfs_read_reg(struct file *file, char __user *userbuf,
 	ret = indio_dev->info->debugfs_reg_access(indio_dev,
 						  indio_dev->cached_reg_addr,
 						  0, &val);
-	if (ret)
+	if (ret) {
 		dev_err(indio_dev->dev.parent, "%s: read failed\n", __func__);
+		return ret;
+	}
 
 	len = snprintf(buf, sizeof(buf), "0x%X\n", val);
 

2.14.1