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| author |   Johan Hovold <johan@kernel.org> | 2021-04-07 11:52:02 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-10 10:36:34 +0200 |
| commit | 1b8b20868a6d64cfe8174a21b25b74367bdf0560 (patch) | |
| tree | ff3f74fd6a145199eebc043d4827d7ba39b8dfc8 /include/linux/tty_driver.h | |
| parent | tty: actually undefine superseded ASYNC flags (diff) | |
| download | wireguard-linux-1b8b20868a6d64cfe8174a21b25b74367bdf0560.tar.xz wireguard-linux-1b8b20868a6d64cfe8174a21b25b74367bdf0560.zip | |
tty: fix return value for unsupported ioctls
Drivers should return -ENOTTY ("Inappropriate I/O control operation")
when an ioctl isn't supported, while -EINVAL is used for invalid
arguments.
Fix up the TIOCMGET, TIOCMSET and TIOCGICOUNT helpers which returned
-EINVAL when a tty driver did not implement the corresponding
operations.
Note that the TIOCMGET and TIOCMSET helpers predate git and do not get a
corresponding Fixes tag below.
Fixes: d281da7ff6f7 ("tty: Make tiocgicount a handler")
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210407095208.31838-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty_driver.h')
| -rw-r--r-- | include/linux/tty_driver.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 61c3372d3f32..2f719b471d52 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -228,7 +228,7 @@ * * Called when the device receives a TIOCGICOUNT ioctl. Passed a kernel * structure to complete. This method is optional and will only be called - * if provided (otherwise EINVAL will be returned). + * if provided (otherwise ENOTTY will be returned). */ #include <linux/export.h> |