diff options
| author | Johan Hovold <johan@kernel.org> | 2021-04-07 12:23:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 09:44:20 +0200 |
| commit | 51a5e5e93c014753b01251e0d232d0549295feb7 (patch) | |
| tree | c018ca0450a942106bbc3493e162fbef4f49f493 /drivers/acpi/cppc_acpi.c | |
| parent | c751e448b726721651c5944c79aef4105186a4c8 (diff) | |
| download | linux-stable-51a5e5e93c014753b01251e0d232d0549295feb7.tar.gz linux-stable-51a5e5e93c014753b01251e0d232d0549295feb7.tar.bz2 linux-stable-51a5e5e93c014753b01251e0d232d0549295feb7.zip | |
staging: greybus: uart: fix unprivileged TIOCCSERIAL
[ Upstream commit 60c6b305c11b5fd167ce5e2ce42f3a9098c388f0 ]
TIOCSSERIAL is a horrid, underspecified, legacy interface which for most
serial devices is only useful for setting the close_delay and
closing_wait parameters.
A non-privileged user has only ever been able to set the since long
deprecated ASYNC_SPD flags and trying to change any other *supported*
feature should result in -EPERM being returned. Setting the current
values for any supported features should return success.
Fix the greybus implementation which instead indicated that the
TIOCSSERIAL ioctl was not even implemented when a non-privileged user
set the current values.
Fixes: e68453ed28c5 ("greybus: uart-gb: now builds, more framework added")
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210407102334.32361-7-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi/cppc_acpi.c')
0 files changed, 0 insertions, 0 deletions