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net/9p: don't allow Tflush to be interrupted

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When a signal is received while sending a Tflush, the client,
which has recursed into p9_client_rpc() while sending another request,
should wait for Rflush as long as the transport is still up.

Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Jim Garlick
2012-02-01 12:48:53 -08:00
committed by Eric Van Hensbergen
parent 3c761ea05a
commit a314f2748e
1 changed files with 8 additions and 0 deletions
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8
net/9p/client.c
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@@ -740,10 +740,18 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
c->status = Disconnected; c->status = Disconnected;
goto reterr; goto reterr;
} }
again:
/* Wait for the response */ /* Wait for the response */
err = wait_event_interruptible(*req->wq, err = wait_event_interruptible(*req->wq,
req->status >= REQ_STATUS_RCVD); req->status >= REQ_STATUS_RCVD);
if ((err == -ERESTARTSYS) && (c->status == Connected)
&& (type == P9_TFLUSH)) {
sigpending = 1;
clear_thread_flag(TIF_SIGPENDING);
goto again;
}
if (req->status == REQ_STATUS_ERROR) { if (req->status == REQ_STATUS_ERROR) {
p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
err = req->t_err; err = req->t_err;