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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-07-04 16:04:19 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:59 -0700 |
| commit | 360e4e9ec085f43a8e975a1810cd053952d7bfad (patch) | |
| tree | 22482a28ec042f7886c26b1046f0787692c65154 /net/9p | |
| parent | 9a8ca28bb26b3d89a604fa2cb2f390102cc6761f (diff) | |
| download | lwn-360e4e9ec085f43a8e975a1810cd053952d7bfad.tar.gz lwn-360e4e9ec085f43a8e975a1810cd053952d7bfad.zip | |
9p: forgetting to cancel request on interrupted zero-copy RPC
commit a84b69cb6e0a41e86bc593904faa6def3b957343 upstream.
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.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/9p')
| -rw-r--r-- | net/9p/client.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index 9186550d77a6..08046f39f09c 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -839,7 +839,8 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, if (err < 0) { if (err == -EIO) c->status = Disconnected; - goto reterr; + if (err != -ERESTARTSYS) + goto reterr; } if (req->status == REQ_STATUS_ERROR) { p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |