forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

kobject: return error code if writing /sys/.../uevent fails

Browse source 
[ Upstream commit df44b47965 ]

Propagate error code back to userspace if writing the /sys/.../uevent
file fails. Before, the write operation always returned with success,
even if we failed to recognize the input string or if we failed to
generate the uevent itself.

With the error codes properly propagated back to userspace, we are
able to react in userspace accordingly by not assuming and awaiting
a uevent that is not delivered.

Signed-off-by: Peter Rajnoha <prajnoha@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Peter Rajnoha 2018-12-05 12:27:44 +01:00 • committed by Greg Kroah-Hartman
commit f7debeebcd
3 changed files with 19 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

6
kernel/module.c
View file

@ -1207,8 +1207,10 @@ static ssize_t store_uevent(struct module_attribute *mattr,
struct module_kobject *mk,
const char *buffer, size_t count)
{
kobject_synth_uevent(&mk->kobj, buffer, count);
return count;
int rc;
rc = kobject_synth_uevent(&mk->kobj, buffer, count);
return rc ? rc : count;
}
struct module_attribute module_uevent =