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media: dmxdev: fix error code for invalid ioctls

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[ Upstream commit a145f64c6107d3aa5a7cec9f8977d04ac2a896c9 ]

Returning -EINVAL when an ioctl is not implemented is a very
bad idea, as it is hard to distinguish from other error
contitions that an ioctl could lead. Replace it by its
right error code: -ENOTTY.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mauro Carvalho Chehab 2018-02-11 05:44:21 -05:00 committed by Greg Kroah-Hartman
parent 515702e0a9
commit 40a8962a53
1 changed files with 1 additions and 1 deletions
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2
drivers/media/dvb-core/dmxdev.c
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@ -1071,7 +1071,7 @@ static int dvb_demux_do_ioctl(struct file *file,
break;
default:
ret = -EINVAL;
ret = -ENOTTY;
break;
}
mutex_unlock(&dmxdev->mutex);