Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-09-23 16:33:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

iio: core: Return error for failed read_reg

Browse Source 
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.

Signed-off-by: Matt Fornero <matt.fornero@mathworks.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matt Fornero 2017-09-05 16:34:10 +02:00 committed by Jonathan Cameron
parent 7ee3b7ebcb
commit 3d62c78a6e
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/iio/industrialio-core.c
View File

@ -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);