staging/fwserial: Only reset port status for attached peers
When a port has been reserved in an attempt to connect to a peer
but that attempt does not succeed, releasing the port should not
reset the port line status. Although resetting is functionally
harmless, it can appear as if a remote peer dropped carrier to a
port it was not attached to (which can be confusing).
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index 59e90e6..8db4b41 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -1783,10 +1783,11 @@
return NULL;
}
-static void fwserial_release_port(struct fwtty_port *port)
+static void fwserial_release_port(struct fwtty_port *port, bool reset)
{
/* drop carrier (and all other line status) */
- fwtty_update_port_status(port, 0);
+ if (reset)
+ fwtty_update_port_status(port, 0);
spin_lock_bh(&port->lock);
@@ -1816,7 +1817,7 @@
spin_unlock_bh(&peer->lock);
if (port)
- fwserial_release_port(port);
+ fwserial_release_port(port, false);
}
/**
@@ -1879,7 +1880,7 @@
peer_revert_state(peer);
release_port:
spin_unlock_bh(&peer->lock);
- fwserial_release_port(port);
+ fwserial_release_port(port, false);
free_pkt:
kfree(pkt);
return err;
@@ -2157,7 +2158,7 @@
spin_unlock_bh(&peer->lock);
if (port)
- fwserial_release_port(port);
+ fwserial_release_port(port, true);
synchronize_rcu();
kfree(peer);
@@ -2617,7 +2618,7 @@
spin_unlock_bh(&peer->lock);
if (port)
- fwserial_release_port(port);
+ fwserial_release_port(port, false);
rcode = fwserial_send_mgmt_sync(peer, pkt);
@@ -2639,7 +2640,7 @@
cleanup:
spin_unlock_bh(&peer->lock);
if (port)
- fwserial_release_port(port);
+ fwserial_release_port(port, false);
kfree(pkt);
return;
}
@@ -2691,7 +2692,7 @@
cleanup:
spin_unlock_bh(&peer->lock);
if (port)
- fwserial_release_port(port);
+ fwserial_release_port(port, true);
kfree(pkt);
return;
}
@@ -2702,6 +2703,7 @@
size_t len)
{
struct fwtty_port *port = NULL;
+ bool reset = false;
int rcode;
if (addr != fwserial_mgmt_addr_handler.offset || len < sizeof(pkt->hdr))
@@ -2777,6 +2779,7 @@
if (be16_to_cpu(pkt->hdr.code) & FWSC_RSP_NACK)
fwtty_notice(&peer->unit, "NACK unplug?");
port = peer_revert_state(peer);
+ reset = true;
}
break;
@@ -2788,7 +2791,7 @@
spin_unlock_bh(&peer->lock);
if (port)
- fwserial_release_port(port);
+ fwserial_release_port(port, reset);
return rcode;
}