From: Will Deacon <will.deacon@arm.com>
Date: Thu, 31 May 2012 23:26:10 +0000 (-0700)
Subject: pipe: return -ENOIOCTLCMD instead of -EINVAL on unknown ioctl command
X-Git-Tag: v3.5-rc1~21^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1d494495c69ef0810cd008f59310d2b9db28e36;p=pandora-kernel.git

pipe: return -ENOIOCTLCMD instead of -EINVAL on unknown ioctl command

As described in commit 07d106d0a33d ("vfs: fix up ENOIOCTLCMD error
handling"), drivers should return -ENOIOCTLCMD if they receive an ioctl
command which they don't understand.  Doing so will result in -ENOTTY
being returned to userspace, which matches the behaviour of the compat
layer if it fails to translate an ioctl command.

This patch fixes the pipe ioctl to return -ENOIOCTLCMD instead of -EINVAL
when passed an unknown ioctl command.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Alan Cox <alan@linux.intel.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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