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Fix: reset word counter in case of failed IPC.

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If IPC fails for some reasons, reset received counter of items+words.
This operation is not performed by the kernel.
This commit is contained in:
Alexander Boettcher 2012-06-25 14:56:46 +02:00 committed by Norman Feske
parent 12f2572155
commit c873faa390
1 changed files with 6 additions and 5 deletions
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11
base-nova/src/base/ipc/ipc.cc
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@ -138,11 +138,12 @@ void Ipc_client::_call()
_rcv_msg->rcv_prepare_pt_sel_window(utcb);
/* establish the mapping via a portal traversal */
if (Ipc_ostream::_dst.dst() == 0)
PWRN("destination portal is zero");
int res = Nova::call(Ipc_ostream::_dst.dst());
if (res)
PERR("call returned %d", res);
uint8_t res = Nova::call(Ipc_ostream::_dst.dst());
if (res) {
/* If an error occurred, reset word&item count (not done by kernel). */
utcb->set_msg_word(0);
PERR("call returned %u", res);
}
copy_utcb_to_msgbuf(utcb, _rcv_msg);
_snd_msg->snd_reset();