linux-kernel - [PATCH 1/1] usb: usbip: userspace: remove the port state file when detaching port.

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Date:	Thu, 15 Nov 2012 16:32:49 +0800
From:	Harvey Yang <harvey.huawei.yang@...il.com>
To:	Matt Mooney <mfm@...eddisk.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Harvey Yang <harvey.huawei.yang@...il.com>
Subject: [PATCH 1/1] usb: usbip: userspace: remove the port state file when detaching port.

with the last detached port state file remaining , usbip reports error on attaching. So clean up the state files on detaching.

Signed-off-by: Harvey Yang <harvey.huawei.yang@...il.com>
---
 drivers/staging/usbip/userspace/src/usbip_detach.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/usbip/userspace/src/usbip_detach.c b/drivers/staging/usbip/userspace/src/usbip_detach.c
index 89bf3c1..312745d 100644
--- a/drivers/staging/usbip/userspace/src/usbip_detach.c
+++ b/drivers/staging/usbip/userspace/src/usbip_detach.c
@@ -19,6 +19,7 @@
 #include <sysfs/libsysfs.h>
 
 #include <ctype.h>
+#include <limits.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -46,6 +47,7 @@ static int detach_port(char *port)
 {
 	int ret;
 	uint8_t portnum;
+	char path[PATH_MAX+1];
 
 	for (unsigned int i=0; i < strlen(port); i++)
 		if (!isdigit(port[i])) {
@@ -56,6 +58,13 @@ static int detach_port(char *port)
 	/* check max port */
 
 	portnum = atoi(port);
+
+	/* remove the port state file */
+
+	snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", portnum);
+
+	remove(path);
+	rmdir(VHCI_STATE_PATH);
 
 	ret = usbip_vhci_driver_open();
 	if (ret < 0) {
-- 
1.7.1

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