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Subject[PATCH 4.4 029/193] usbip: keep usbip_device sockfd state in sync with tcp_socket
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shuah Khan <shuahkh@osg.samsung.com>

commit 009f41aed4b3e11e6dc1e3c07377a10c20f1a5ed upstream.

Keep usbip_device sockfd state in sync with tcp_socket. When tcp_socket
is reset to null, reset sockfd to -1 to keep it in sync.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/usbip/stub_dev.c | 3 +++
drivers/usb/usbip/vhci_hcd.c | 2 ++
2 files changed, 5 insertions(+)

--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -87,6 +87,7 @@ static ssize_t store_sockfd(struct devic
goto err;

sdev->ud.tcp_socket = socket;
+ sdev->ud.sockfd = sockfd;

spin_unlock_irq(&sdev->ud.lock);

@@ -186,6 +187,7 @@ static void stub_shutdown_connection(str
if (ud->tcp_socket) {
sockfd_put(ud->tcp_socket);
ud->tcp_socket = NULL;
+ ud->sockfd = -1;
}

/* 3. free used data */
@@ -280,6 +282,7 @@ static struct stub_device *stub_device_a
sdev->ud.status = SDEV_ST_AVAILABLE;
spin_lock_init(&sdev->ud.lock);
sdev->ud.tcp_socket = NULL;
+ sdev->ud.sockfd = -1;

INIT_LIST_HEAD(&sdev->priv_init);
INIT_LIST_HEAD(&sdev->priv_tx);
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -797,6 +797,7 @@ static void vhci_shutdown_connection(str
if (vdev->ud.tcp_socket) {
sockfd_put(vdev->ud.tcp_socket);
vdev->ud.tcp_socket = NULL;
+ vdev->ud.sockfd = -1;
}
pr_info("release socket\n");

@@ -844,6 +845,7 @@ static void vhci_device_reset(struct usb
if (ud->tcp_socket) {
sockfd_put(ud->tcp_socket);
ud->tcp_socket = NULL;
+ ud->sockfd = -1;
}
ud->status = VDEV_ST_NULL;


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