linux-kernel - [PATCH 5/7] staging: usbip: vhci: friendly log messages for connection errors

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Date:	Wed, 12 Jan 2011 15:02:03 +0200
From:	Max Vozeler <max@...eler.com>
To:	gregkh@...e.de
Cc:	hirofuchi@...rs.sourceforge.net, rpjday@...shcourse.ca,
	bgmerrell@...ell.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, mwehby@...otticaRetail.com,
	marco@...ikam.com, Max Vozeler <max@...eler.com>
Subject: [PATCH 5/7] staging: usbip: vhci: friendly log messages for connection errors

Also changes the event on connection close to be
VDEV_EVENT_DOWN - no functional change.

Signed-off-by: Max Vozeler <max@...eler.com>
---
 drivers/staging/usbip/vhci_rx.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/usbip/vhci_rx.c b/drivers/staging/usbip/vhci_rx.c
index bdbedd2..ac15cea 100644
--- a/drivers/staging/usbip/vhci_rx.c
+++ b/drivers/staging/usbip/vhci_rx.c
@@ -205,11 +205,23 @@ static void vhci_rx_pdu(struct usbip_device *ud)
 
 	memset(&pdu, 0, sizeof(pdu));
 
-
 	/* 1. receive a pdu header */
 	ret = usbip_xmit(0, ud->tcp_socket, (char *) &pdu, sizeof(pdu), 0);
+	if (ret < 0) {
+		if (ret == -ECONNRESET)
+			usbip_uinfo("connection reset by peer\n");
+		else if (ret != -ERESTARTSYS)
+			usbip_uinfo("xmit failed %d\n", ret);
+		usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+		return;
+	}
+	if (ret == 0) {
+		usbip_uinfo("connection closed");
+		usbip_event_add(ud, VDEV_EVENT_DOWN);
+		return;
+	}
 	if (ret != sizeof(pdu)) {
-		usbip_uerr("receiving pdu failed! size is %d, should be %d\n",
+		usbip_uerr("received pdu size is %d, should be %d\n",
 					ret, (unsigned int)sizeof(pdu));
 		usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
 		return;
-- 
1.7.2.3

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