tree 74faea3dcd270a007885d20cb57973d0189731a5
parent 43c3dd08da890e458f670b4fc0630513fb405620
author Al Viro <viro@zeniv.linux.org.uk> 1436040259 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1436040259 -0400

9p: forgetting to cancel request on interrupted zero-copy RPC

If we'd already sent a request and decide to abort it, we *must*
issue TFLUSH properly and not just blindly reuse the tag, or
we'll get seriously screwed when response eventually arrives
and we confuse it for response to later request that had reused
the same tag.

Cc: stable@vger.kernel.org # v3.2 and later
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>