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| author | Johan Hovold <johan@kernel.org> | 2021-04-07 12:52:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-22 11:59:31 +0300 |
| commit | 76d7fc0857bc4033415fcad905db13753d0febc7 (patch) | |
| tree | 83df353495d985430dc9ff57c49d2dc5c37b3caa /include | |
| parent | 2c9525d64418383861679d3519ebc10002123507 (diff) | |
| download | linux-76d7fc0857bc4033415fcad905db13753d0febc7.tar.xz | |
tty: fix return value for unsupported ioctls
[ Upstream commit 1b8b20868a6d64cfe8174a21b25b74367bdf0560 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -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 71dbc891851a..e10b09672345 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -236,7 +236,7 @@ * * 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> |