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authorAl Viro <viro@zeniv.linux.org.uk>2015-07-04 16:04:19 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2015-07-04 16:04:19 -0400
commita84b69cb6e0a41e86bc593904faa6def3b957343 (patch)
tree74faea3dcd270a007885d20cb57973d0189731a5
parent43c3dd08da890e458f670b4fc0630513fb405620 (diff)
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>
-rw-r--r--net/9p/client.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 6f4c4c88db84..28f36e4556f9 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -843,7 +843,8 @@ 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);

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