Staging: usbip: usbip_start_threads(): handle kernel_thread failure

kernel_thread may fail, notice this.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/usbip/usbip_common.c b/drivers/staging/usbip/usbip_common.c
index 72e2092..22f93dd 100644 (file)
--- a/drivers/staging/usbip/usbip_common.c
+++ b/drivers/staging/usbip/usbip_common.c
@@ -406,8 +406,20 @@ void usbip_start_threads(struct usbip_device *ud)
        /*
         * threads are invoked per one device (per one connection).
         */
-       kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
-       kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
+       int retval;
+
+       retval = kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
+       if (retval < 0) {
+               printk(KERN_ERR "Creating tcp_rx thread for ud %p failed.\n",
+                               ud);
+               return;
+       }
+       retval = kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
+       if (retval < 0) {
+               printk(KERN_ERR "Creating tcp_tx thread for ud %p failed.\n",
+                               ud);
+               return;
+       }
 
        /* confirm threads are starting */
        wait_for_completion(&ud->tcp_rx.thread_done);