Re: [PATCH] staging: usbip: stub_dev: Fixed oops during removal of usbip_host

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Hello.

On 14-09-2012 13:53, navin patidar wrote:

stub_device_reset should set kernel thread pointers to NULL.
so that at the time of usbip_host removal stub_shoutdown_connection
doesn't try to kill kernel threads which are already killed.

Signed-off-by: navin patidar <navinp@xxxxxxx>
---
  drivers/staging/usbip/stub_dev.c |   14 +++++++++-----
  1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/usbip/stub_dev.c b/drivers/staging/usbip/stub_dev.c
index 92ced35..f584af8 100644
--- a/drivers/staging/usbip/stub_dev.c
+++ b/drivers/staging/usbip/stub_dev.c
@@ -192,16 +192,13 @@ static void stub_shutdown_connection(struct usbip_device *ud)
  	if (ud->tcp_tx)
  		kthread_stop_put(ud->tcp_tx);

-	/*
-	 * 2. close the socket
+	/* 2. close the socket

   It's the preferred comment style -- why modify it?

  	 *
  	 * tcp_socket is freed after threads are killed so that usbip_xmit does
  	 * not touch NULL socket.
  	 */
-	if (ud->tcp_socket) {
+	if (ud->tcp_socket)
  		sock_release(ud->tcp_socket);
-		ud->tcp_socket = NULL;
-	}

  	/* 3. free used data */
  	stub_device_cleanup_urbs(sdev);
@@ -233,6 +230,13 @@ static void stub_device_reset(struct usbip_device *ud)

  	dev_dbg(&udev->dev, "device reset");

+	/*reset tcp socket*/

   Add spaces after /* and before */, please.

+	ud->tcp_socket = NULL;
+
+	/*reset kernel thread pointers */

   Here too.

WBR, Sergei

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