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staging: gasket: apex return error on sysfs show of missing attribute

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Apex sysfs show function return -ENODEV if the attribute is not present,
rather than silently failing from the standpoint of the userspace
accessor.

Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Todd Poynor
2018-07-21 06:35:01 -07:00
committed by Alex Van Damme
parent 391b97b101
commit 8127031234
1 changed files with 2 additions and 2 deletions
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4
apex_driver.c
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@@ -780,14 +780,14 @@ static ssize_t sysfs_show(
gasket_dev = gasket_sysfs_get_device_data(device);
if (!gasket_dev) {
gasket_nodev_error("No Apex device sysfs mapping found");
return 0;
return -ENODEV;
}
gasket_attr = gasket_sysfs_get_attr(device, attr);
if (!gasket_attr) {
gasket_nodev_error("No Apex device sysfs attr data found");
gasket_sysfs_put_device_data(device, gasket_dev);
return 0;
return -ENODEV;
}
type = (enum sysfs_attribute_type)gasket_sysfs_get_attr(device, attr);