[PATCH v2 1/3] usbipd: enable SO_KEEPALIVE socket option for accepted connection

[Vadym Hrynchyshyn <vadimgrn@gmail.com>]

If usbip client does not close a TCP/IP connection to a daemon
gracefully, the daemon will keep this connection open indefinitely.

The issue is that the client cannot attach this device again
until the device will be rebinded on server side by commands:
usbip unbind -b X-Y
usbip bind -b X-Y

usbip client enables tcp keepalive by calling usbip_net_set_keepalive
from usbip_net_tcp_connect. usbip daemon now enables this socket option
too for accepted connection.

Signed-off-by: Vadym Hrynchyshyn <vadimgrn@gmail.com>
---
 tools/usb/usbip/src/usbipd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/usb/usbip/src/usbipd.c b/tools/usb/usbip/src/usbipd.c
index 48398a78e88a..d89633d8f799 100644
--- a/tools/usb/usbip/src/usbipd.c
+++ b/tools/usb/usbip/src/usbipd.c
@@ -119,6 +119,7 @@ static int recv_request_import(int sockfd)
 	if (found) {
 		/* should set TCP_NODELAY for usbip */
 		usbip_net_set_nodelay(sockfd);
+		usbip_net_set_keepalive(sockfd);
 
 		/* export device needs a TCP/IP socket descriptor */
 		status = usbip_export_device(edev, sockfd);
-- 
2.43.0